| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 323266000 | Including pre or post regulation | 46 |
| 20080203982 | POWER SUPPLY SYSTEM FOR MOTHERBOARD - A power supply system for a motherboard includes a voltage regulator circuit includes a system power source, and a voltage output terminal, a sampling circuit having an input, and an output receiving a high level sleep signal from a south bridge of the motherboard, a switching circuit having an input, and an output, a power connector having a control terminal connected to the output of the switching circuit, and a power source being connected to the power connector. When the voltage regulator circuit outputs a voltage greater than a predetermined stable voltage to the sampling circuit, the sampling circuit outputs a low level signal to the switching circuit which in return outputs a high level signal to the control terminal of the power connector to cut off power supply from the power source to the system power source. | 08-28-2008 |
| 20080203983 | VOLTAGE REGULATOR WITH LEAKAGE CURRENT COMPENSATION - A voltage regulator having an input terminal for receiving an input voltage and an output terminal for providing a regulated voltage, the voltage regulator including: a differential amplifier configured for receiving a reference voltage and a feedback signal being a function of the regulated voltage, and for providing a regulation signal according to a comparison between the reference voltage and the feedback signal, a regulation transistor having a control terminal for receiving the regulation signal, a first terminal for receiving the first voltage and a second terminal coupled with the output terminal of the voltage regulator, wherein a voltage-controlled circuit coupled to the output terminal, responsive to a voltage difference between the first voltage and the regulation voltage and adapted to sink from the output terminal a current depending on said voltage difference between the supply voltage and the regulation voltage, said current being related to a leakage current of the regulation transistor. | 08-28-2008 |
| 20080272750 | Device - A device includes an output and a linear regulator coupled to the output. The device also includes a switching regulator coupled to the output and means for controlling said switching regulator in dependence on power loss in said linear regulator. | 11-06-2008 |
| 20080278123 | Switching regulator circuit, system, and method for providing input current measurement without a dedicated input current sense element - A synchronous regulator includes a controller coupled to receive a reference signal and a feedback signal from the regulator operable to provide a pulse width modulation (PWM) signal at its output. The regulator includes at least one gate driver coupled to receive the PWM signal, and a synchronous output switch having a phase node there between controlled by the gate driver, and regulator input current measurement circuitry. The regulator input current measurement circuitry comprises a circuit operable for providing a signal representative of at least one phase node timing parameter, a sensing circuit operable for sensing inductor or output current provided by the regulator, and a calculation circuit coupled to receive the signal representative of the phase node timing parameters and the inductor or output current and is operable to determine the input current. | 11-13-2008 |
| 20080284389 | POWER SUPPLY APPARATUS - A power supply apparatus that supplies an operating voltage to a microcomputer reliably resets the microcomputer before operation becomes unstable when an external power supply voltage decreases due to interruption. A switching regulator and series regulators are included. An externally supplied power supply voltage is stepped down to generate an intermediate voltage. The intermediate voltage is stepped down to generate an operating voltage for a microcomputer core. The intermediate voltage is stepped down to generate an operating voltage for an I/O port. When the intermediate voltage becomes lower than a reset determining voltage, the power supply apparatus outputs a reset signal to the microcomputer. When the power supply voltage decreases, the microcomputer can be reliably reset and the core can be prevented from operating erratically before the voltage becomes lower than a minimum core operating voltage. | 11-20-2008 |
| 20090001946 | SYSTEM AND METHOD TO CALCULATE INITIAL DUTY CYCLE - A system and method for determining an initial duty cycle for startup of a voltage regulator involves generating a first current source responsive to an input voltage to the voltage regulator and generating a second current source responsive to an output voltage of the voltage regulator. A first capacitor is charged using the first current source responsive to a duty cycle of a PWM signal of the voltage regulator to a first voltage. A second capacitor is charged to a second voltage responsive to a period of the PWM signal of the voltage regulator. The initial duty cycle for startup of the voltage regulator is established as the duty cycle of the PWM signal when the first voltage is substantially equal to the second voltage. | 01-01-2009 |
| 20090015217 | POWER SUPPLY CONTROLLER AND METHOD THEREFOR - In one embodiment, a power supply controller is configured to form a reference signal that has selectable values. The power supply controller is also configured to form a feed-forward signal in response to change in the value of the reference voltage and to use this feed-forward signal control the value of an output current. | 01-15-2009 |
| 20090021228 | INTEGRATED CMOS DC-DC CONVERTER IMPLEMENTATION IN LOW-VOLTAGE CMOS TECHNOLOGY USING LDO REGULATOR - An electrical circuit and method of power management of a cellular telephone includes a battery adapted to produce a battery voltage; a LDO regulator operatively connected to the battery and adapted to provide a constant supply voltage from the battery voltage; and a DC-DC converter operatively connected to the LDO regulator, wherein the DC-DC converter is adapted to step down the constant supply voltage to a lower voltage level, wherein the LDO regulator and the DC-DC converter are embedded on a single integrated circuit chip. The constant supply voltage equals 3.6V at an output of the LDO, and the constant supply voltage is applied to an input of the DC-DC converter. Moreover, the battery voltage equals at most 5.5V. | 01-22-2009 |
| 20090039840 | REGULATOR AND HIGH VOLTAGE GENERATOR - A regulator included in a high voltage generator for supplying a high voltage to a semiconductor memory device is disclosed. The regulator includes a voltage dividing circuit configured to divide an output voltage of a charge pump, a comparing circuit configured to compare a reference voltage with a divided voltage by the voltage dividing circuit, a regulator driving circuit configured to couple selectively the voltage dividing circuit to a ground, and a high voltage discharging circuit configured to discharge the divided voltage applied to the comparing circuit when supply of a power supply voltage is stopped. | 02-12-2009 |
| 20090102439 | Step-up DC/DC voltage converter with improved transient current capability - A DC/DC voltage converter includes an inductive switching voltage regulator and a capacitive charge pump connected in series between the input and output terminals of the converter. The charge pump has a second input terminal connected to the input terminal of the converter. This reduces the series resistance in the current path by which charge is transferred from the capacitor in the charge pump to the output capacitor and thereby improves the ability of the converter to respond to rapid changes in current required by the load. | 04-23-2009 |
| 20090160410 | REAL TIME CLOCK (RTC) VOLTAGE REGULATOR AND METHOD OF REGULATING AN RTC VOLTAGE - A real time clock (RTC) voltage regulator, a method of regulating an RTC voltage and a power management integrated circuit (PMIC). In one embodiment, an RTC voltage regulator includes a current source configured to provide a first current and a voltage regulator having a common gate amplifier and a power device. The first current is employed to establish a reference voltage for the common gate amplifier and the common gate amplifier is configured to control the power device. The power device is configured to provide an RTC voltage for the common gate amplifier. | 06-25-2009 |
| 20090167263 | Current limiting circuit and voltage regulator using the same - Techniques pertaining to a voltage regulator with a current limiting circuit having low quiescent current are disclosed. According to one aspect of the present invention, a current limiting circuit is provided for limiting a current passing through an output pass circuit of a voltage regulator, the current limiting circuit comprises: a current sampling circuit for sampling the current passing through the output pass circuit to obtain a duplicated current being proportional to the current passing through the output pass circuit; a current mirror circuit for producing a mirror current being proportional to the duplicated current with the duplicated current as a reference current; a current to voltage converter for producing a voltage being proportional to the mirror current; and a voltage comparator for comparing the voltage produced by the current to voltage converter with a threshold voltage and turning off the output pass circuit when the voltage produced by the current to voltage converter is larger than or equal to the threshold voltage. | 07-02-2009 |
| 20090261790 | SYNCHRONOUS RECTIFIER POST REGULATOR - Methods and apparatus for regulating a synchronous rectifier DC-to-DC converter by adjusting one or more existing synchronous rectifiers in the converter are provided. By regulating an existing synchronous rectifier, the rectifier may function as a modulator for post regulation over a limited range of output voltages suitable for load regulation, without introducing an additional conversion stage for post regulation, which typically decreases efficiency and power density. Independent post regulation of an existing synchronous rectifier may improve the load regulation, reduce output voltage ripple, and improve the transient response of the converter. By operating independently from the main control loop, post regulation may most likely avoid the limitations of the main control loop, such as limited gain bandwidth and a relatively slow transient response. Such post regulation may be added to isolated or non-isolated switched-mode power supplies, such as forward or buck converters. | 10-22-2009 |
| 20100052631 | STRUCTURE OF A POWER SUPPLY - An improved structure of a power supply mainly discloses three PSR solutions based on a PWM controller that is used in charger/adapter solutions, in which a low voltage PNP transistor and zener diode composes error signal amplification circuit, or −431 typed shunt regulators senses and amplifies the input error signal caused by the changes of load or line voltage, or one diode and two resistors form sense circuit of error signal. These PSR solutions employ a transformer, in which the input side of the transformer is connected to an AC input and PWM controller, and the output side of the transformer is connected to a rectified diode. The present invention further provides low cost PSR solutions with higher system reliability, better line/load regulation, and short circuit characteristic. | 03-04-2010 |
| 20100176773 | CIRCUIT AND METHOD FOR CONTROLLING THE POINT OF MAXIMUM POWER FOR SOLAR ENERGY SOURCE AND SOLAR GENERATOR INCORPORATING SAID CIRCUIT - The invention is designed for continuous, rapid and effective monitoring of a solar or equivalent source in order successfully to arrange for it to operate at its point of maximum power (PMP) without interrupting the supply of electricity to users, with a conventional power-regulating structure of series or parallel type, governed by an independent module capable of calculating the voltage and current coordinates of said PMP (VPMP, IPMP) by applying an iterative algorithm and/or graphic methods. This module ideally requires only one measurement point, relating to the electrical characteristic, with the ambient conditions of said source, and as a result it delivers a reference signal, a continuous, stable voltage constantly representative of the evolution of the PMP, for the power regulator. In the event of the use of a power-regulating structure of S3R or ASR type, information about the PMP is immediate and requires no intermediate measurement point. | 07-15-2010 |
| 20100327825 | SWITCHING REGULATOR CIRCUIT, SYSTEM, AND METHOD FOR PROVIDING INPUT CURRENT MEASUREMENT WITHOUT A DEDICATED INPUT CURRENT SENSE ELEMENT - A synchronous regulator includes a controller coupled to receive a reference signal and a feedback signal from the regulator operable to provide a pulse width modulation (PWM) signal at its output. The regulator includes at least one gate driver coupled to receive the PWM signal, and a synchronous output switch having a phase node there between controlled by the gate driver, and regulator input current measurement circuitry. The regulator input current measurement circuitry comprises a circuit operable for providing a signal representative of at least one phase node timing parameter, a sensing circuit operable for sensing inductor or output current provided by the regulator, and a calculation circuit coupled to receive the signal representative of the phase node timing parameters and the inductor or output current and is operable to determine the input current. | 12-30-2010 |
| 20110031946 | Multiple Branch Alternative Element Power Regulation - A power regulation circuit includes at least a first regulator connected to a second regulator in series forming a first regulator pair and a third regulator connected to a fourth regulator in series forming a second regulator pair. The first regulator pair is connected in parallel with the second regulator pair. Each individual regulator is configured to separately regulate an input voltage to a predetermined regulated output voltage. The second regulator pair regulates the input voltage if a short condition occurs within the first regulator pair and the second and fourth regulators each regulate the input voltage if an open condition occurs within the first or third regulator respectively. | 02-10-2011 |
| 20110121798 | DCDC CONVERTER - A DCDC converter includes a switching circuit, to an input end of which an input filer circuit is connected, a smoothing filter circuit connected to an output end of the switching circuit and including a reactor and a capacitor, and a control unit that feeds back a state amount of the smoothing filter circuit and turns the switching circuit on and off. The control unit includes a damping control unit that calculates, based on the voltage of the capacitor, a damping operation amount for adjusting a state amount of the smoothing filter circuit. | 05-26-2011 |
| 20110156668 | VOLTAGE CONVERTER - A DC voltage converter, comprising: a multi-ratio capacitive converter; a linear voltage regulator in series with the multi-ratio capacitive converter; and a controller; the controller arranged to control the ratio of the multi-ratio capacitive converter dependent upon the voltage difference across the linear voltage regulator. | 06-30-2011 |
| 20110204858 | SEMICONDUCTOR CIRCUIT AND SWITCHING POWER SUPPLY APPARATUS - The power supply apparatus realizes a high-speed response, a stable operation, and a low output ripple with low power consumption. The first stage switching regulator receives an input voltage and forms a first voltage. The second stage switching regulator receives the first voltage and forms a second voltage. The second stage switching regulator includes an N-phase (N is two or more) switching regulator, and the first voltage is set to be N times a target value of the second voltage. The input voltage is set to be higher than the first voltage. | 08-25-2011 |
| 20110248690 | POWER SUPPLY CIRCUIT FOR COMBUSTION APPLIANCE - An electrical circuit includes a rectifier having an input for receiving an alternating current (AC) voltage and an output for supplying a first direct current (DC) voltage. The circuit also includes a first regulator having an input electrically connected to the rectifier for receiving the first DC voltage and an output for supplying a second DC voltage. The circuit further includes a second regulator having an input electrically connected to the output of the first regulator for receiving the second DC voltage and an output for providing a third DC voltage. | 10-13-2011 |
| 20120001602 | Multiple Branch Alternative Element Power Regulation - A power regulation scheme includes a first voltage regulation portion connected in parallel with a second voltage regulation portion that regulates a voltage if an open condition occurs within the first voltage regulation portion. Each voltage regulation portion may include a first voltage regulator connected in series with a second voltage regulator that regulates the voltage if a short condition occurs within the first voltage regulator. Each voltage regulation portion may utilize a switching element to route an output voltage of the first voltage regulator past the second voltage regulator if the output voltage has been regulated and/or to force the output voltage to be regulated by the second voltage regulator if the output voltage has not been regulated. | 01-05-2012 |
| 20120105028 | POWER SUPPLY WITH DYNAMIC INPUT CURRENT SUPPRESSION - A power supply is described, which comprises a first stage DC-to-DC voltage conversion block, and a second stage voltage conversion block having a feedback circuit to regulate the output voltage (V | 05-03-2012 |
| 20120146598 | POWER CONVERTING APPARATUS AND METHOD OF SENSING OUTPUT CURRENT THEREOF - A power converting apparatus includes a power converter, a first resistor, a second resistor, a current controller, a voltage sensor, a sample/holder, and a switch controller. The power converter converts an input voltage into an output voltage. The first resistor is connected to an output of the power converter, and the second resistor is connected to the first resistor. The current controller controls a first current to make the first current that is less than a second current flowing in the first resistor flow in the second resistor, and outputs a third current corresponding to the first current. The voltage sensor senses a first voltage corresponding to the third current. The sample/holder samples the first voltage, and outputs the sampled voltage. The switch controller controls an operation of the power converter based on a voltage output from the sample/holder. | 06-14-2012 |
| 20120153907 | Dual-Stage Power Conversion - A circuit converts an input voltage to an output voltage. The circuit includes a first stage voltage converter that receives the input voltage and converts the input voltage. The first stage voltage converter includes a first buck converter having a double rail output: a first rail at a high intermediate voltage and a second rail at a low intermediate voltage. The circuit also includes a second stage voltage converter that receives the output rails and produces the output voltage. | 06-21-2012 |
| 20120169304 | Highly Simplified Switching Regulator Which Allows Very High Switching Frequencies - A method combining linear LDO and switching regulators to eliminate complex duty cycle control methods therefore allowing increased switching frequencies for higher performance and less cost, discrete or fully integrated high efficiency regulators. Apparatus making PWM system an open loop digital circuit, while maintaining analog close loop with traditional linear regulator by combining both techniques in a simplified form. | 07-05-2012 |
| 20130002213 | VOLTAGE REGULATOR STRUCTURE - A regulator structure includes a first differential amplifier having a first input coupled to a reference voltage node. A second differential amplifier has a first input coupled to the output of the first differential amplifier. A third differential amplifier has a first input coupled to the output of the first differential amplifier. A first pmos transistor has its gate coupled to the second differential amplifier output, and its drain coupled to a second input of each of the first and second differential amplifiers. A second pmos transistor has its gate coupled to the third differential amplifier output, and its drain configured to output a regulated voltage which is also a second input of the third differential amplifier. A circuit is configured to replicate the regulated voltage and couple the replicated regulated voltage to the drain of the first pmos transistor. | 01-03-2013 |
| 20130015827 | POWER MANAGEMENT CIRCUIT AND METHODAANM SHI; JustinAACI Ann ArborAAST MIAACO USAAGP SHI; Justin Ann Arbor MI US - A power management circuit and method are described. In the method, whether a first voltage and/or a voltage source are present is determined. Based on a first result of the determination, the first voltage is converted to a second voltage. A boost converter is used to convert the second voltage to a third voltage, Alternatively, based on a second result of the determination, a buck converter is used to convert the third voltage to the second voltage. | 01-17-2013 |
| 20130169246 | LINEAR VOLTAGE REGULATING CIRCUIT ADAPTABLE TO A LOGIC SYSTEM - A linear voltage regulating circuit adaptable to a logic system is disclosed. A first linear voltage regulator receives an input voltage and a first reference voltage. A second linear voltage regulator has a load driving capability lower than the first linear voltage regulator, and the second linear voltage regulator receives the input voltage and a second reference voltage. An output node of the first linear voltage regulator and an output node of the second linear voltage regulator are directly connected at a single common output node. A single common capacitor is connected between the common output node and a ground. | 07-04-2013 |
| 20140117951 | MULTI-STAGE POWER SUPPLY WITH FAST TRANSIENT RESPONSE - Embodiments are disclosed relating to an electric power conversion device and methods for controlling the operation thereof. One disclosed embodiment provides a multi-stage electric power conversion device including a first regulator stage including a first stage energy storage device and a second regulator stage including a second stage energy storage device, the second stage energy storage device being operatively coupled between the first stage energy storage device and the load. The device further includes a control mechanism operative to control (i) a first stage output voltage on a node between the first stage energy storage device and the second stage energy storage device and (ii) a second stage output voltage on a node between the second stage energy storage device and the load. | 05-01-2014 |
| 20140125299 | SWITCHED MODE ASSISTED LINEAR REGULATOR WITH DECOUPLED OUTPUT IMPEDANCE AND SIGNAL PATH BANDWIDTH - The disclosed switched mode assisted linear (SMAL) amplifier/regulator architecture may be configured as a SMAL regulator to supply power to a dynamic load, such as an RF power amplifier. Embodiments of a SMAL regulator include configurations in which a linear amplifier and a switched mode converter (switcher) parallel coupled at a supply node, and configured such that the amplifier sets load voltage, while the amplifier and the switched mode converter are cooperatively controlled to supply load current. In one embodiment, the amplifier includes separate feedback loops: an external relatively lower speed feedback loop may be configured for controlling signal path bandwidth, and an internal relatively higher speed feedback loop may be configured for controlling output impedance bandwidth of the linear amplifier. In another embodiment, the linear amplifier is AC coupled to the supply node, and the switched converter is configured with a capacitive charge control loop that controls the switched converter to effectively control the amplifier to provide capacitive charge control. | 05-08-2014 |
| 20140152273 | CONVERTER CIRCUIT - A converter circuit may include: a first node receiving an input voltage; a second node providing an output voltage; a first inductor between the first node and a third node; a capacitor between the third node and a first terminal of a diode, the other terminal of the diode providing said output voltage; a second inductor between the first terminal of the diode and common; an electronic switch acting between the third node and common; a first current generator acting between the first node and the switch to drive the switch to the conductive condition; and a second current generator sensitive to the current through the switch in the “on” condition and/or the output voltage on the second node, the second current generator to draw current from the first current generator to drive the switch to the non-conductive condition. | 06-05-2014 |
| 20140167713 | REGULATOR AND VOLTAGE GENERATOR - A regulator includes an input voltage adjusting unit configured to adjust a pumping voltage in response to a control signal varied depending on a target voltage and output the adjusted pumping voltage and a regulation unit configured to output the target voltage by regulating the adjusted pumping voltage. The regulator may reduce current consumption by adjusting the pumping voltage inputted according to the target voltage. | 06-19-2014 |
| 20140167714 | SOFT-START CIRCUITS AND POWER SUPPLIERS USING THE SAME - A soft-start circuit is provided. The soft-start circuit generates an output voltage at an output terminal. The soft-start includes a transistor, a capacitor, and a current source. The transistor has a first terminal receiving an input voltage, a second terminal coupled to the output terminal, and a control terminal. The capacitor is coupled between the second terminal and the control terminal of the transistor. The current source is coupled between the control terminal of the transistor and a ground terminal. The capacitor and the current source modulate the output voltage by modulating a driving voltage at the control terminal to perform a soft-start operation of the output voltage. | 06-19-2014 |
| 20140176094 | DC/DC Module of LCD Driving Circuit - The present invention provides a DC/DC module of a LCD driving circuit. The DC/DC module comprises a buck-boost circuit, which is used to convert the input voltage of the DC/DC module into a gate off-state voltage VGL; a LDO circuit, which is connected in series to the buck-boost circuit, used to convert the input voltage of the buck-boost circuit into a lower limit output voltage VBB of a liquid crystal driver; a BUCK circuit, which is used to convert the input voltage of the DC/DC module into a operating voltage VDD of a specific IC; a charge pump circuit, which is used to convert the input voltage of the DC/DC module into a gate on-state voltage VGH; wherein, the input voltage of the DC/DC module is used directly as an upper limit output voltage VAA of the liquid crystal driver. The DC/DC module according to the present invention has simple circuit structure, low hardware cost, and high load capacity. | 06-26-2014 |
| 20140232360 | PREDICTIVE CURRENT SENSING - A system and method are provided for estimating current. A current source is configured to generate a current and a pulsed sense enable signal is generated. An estimate of the current is generated and the estimate of the current is updated based on a first signal that is configured to couple the current source to an electric power supply and a second signal that is configured to couple the current source to aloud. A system includes the current source and a current prediction unit. The current source is configured to generate a current. The current prediction unit is coupled the current source and is configured to generate the estimate of the current and update the estimate of the current based on the first signal and the second signal. | 08-21-2014 |
| 20140266088 | VOLTAGE REGULATOR CIRCUIT WITH CONTROLLED VOLTAGE VARIATION - According to one embodiment, a voltage regulator circuit includes a first regulator, and a second regulator. The first regulator includes a first transistor of a first conductive type, which outputs a second voltage that is generated from a first voltage and lower than the first voltage to an output node. The first regulator is usually operated. The second regulator includes a second transistor of a second conductive type, which outputs the second voltage generated from the first voltage to the output node. The second transistor is operated in a weak inversion region when data is input or output. | 09-18-2014 |
| 20140285164 | POWER SUPPLY DEVICE AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A power supply device includes a linear regulator including an output stage amplifier, a current sensing circuit, and a switching regulator. The current sensing circuit detects an output current of the linear regulator, and is disposed in parallel with the output stage amplifier, in a configuration corresponding to the output stage amplifier. The switching regulator operates in accordance with an output signal of the current sensing circuit. The linear regulator and the switching regulator operate in collaboration with each other to generate an output voltage at an output node. | 09-25-2014 |
| 20140306672 | POWER SUPPLY CIRCUIT, POWER SUPPLY SYSTEM, AND ELECTRIC STORAGE DEVICE - There is provided a power supply circuit including a first series regulator including a first semiconductor element and a first constant voltage source, and a second series regulator including a second semiconductor element and a second constant voltage source, wherein the first series regulator and the second series regulator are cascaded and an input voltage to the first series regulator is a high voltage equal to or greater than 500 V. | 10-16-2014 |
| 20140306673 | APPARATUS, SYSTEMS, AND METHODS FOR PROVIDING A HYBRID POWER REGULATOR - The present disclosure shows a hybrid regulator topology that can be more easily integrated and that can maintain high efficiency across a wide output and input voltage range, even with a small inductor. The hybrid regulator topology can include two types of regulators: a flying switched-inductor regulator and a step-down regulator that divides the input voltage into an M/N fraction of the input voltage. The disclosed embodiments of the hybrid regulator topology can reduce the capacitive loss of the flying switched-inductor regulator by limiting the voltage swing across the switches in the flying switched-inductor regulator. The disclosed embodiments of the hybrid regulator topology can reduce the inductor resistive loss of the flying switched-inductor regulator by operating the flying switched-inductor regulator at a high switching frequency and with a small amount of current flow through the inductor. | 10-16-2014 |
| 20140327417 | Voltage Adjustment Method, and Voltage Pre-Regulator Power Supply Circuit and System - A voltage adjustment method, and a voltage pre-regulator power supply circuit and system, that implements highly-efficient output of a power supply in a quasi straight-through state and increases voltage output precision of a circuit. The voltage adjustment method includes receiving a to-be-adjusted voltage through a positive wire input end and a negative wire input end; changing, in a control mode in which a connection time is fixed and a disconnection time is adjusted, a duty cycle for the to-be-adjusted voltage to obtain a primary adjusted voltage; and changing, in a control mode in which a disconnection time is fixed and a connection time is adjusted, a duty cycle for the primary adjusted voltage to obtain an output voltage. The present disclosure is applied to a non-isolated direct-current quasi straight-through pre-regulator power supply. | 11-06-2014 |
| 20140375284 | POWER TRANSFER DEVICES - A power transfer device includes an input terminal, an output terminal, a control unit, and a drive unit. The input terminal can receive an input voltage. The output terminal can provide an output voltage. The control unit can control a switch between the input and output terminals to adjust the output voltage according to the input voltage and a reference voltage, wherein said control unit is deactivated if the reference voltage reaches the input voltage. The drive unit can connect the control unit and the switch if the control unit is activated, and can maintain the output voltage at or near the input voltage if the control unit is deactivated. | 12-25-2014 |
| 20150123628 | Apparatus and Method for a Voltage Regulator with Improved Power Supply Reduction Ratio (PSRR) with Reduced Parasitic Capacitance on Bias Signal Lines - An apparatus and method for a system with improved power supply rejection ratio (PSRR) over a wide frequency range. The improved PSRR is achieved by negating the influence of the parasitic capacitance associated with the bias lines and the introduction of a regulated power supply with embodiments associated with providing a ripple free and regulated supply. With reduction of parasitic capacitance, and providing an ENABLE switch by a pre-regulated supply, the degradation of the PSRR is achieved. The embodiments include both n-channel and p-channel MOSFETs implementations, and a positive and negative regulated power supply voltage. With the combined influence of the utilization of the VREG supply, and the lowering of battery-to-bias line capacitance using design layout and improved floor planning an improved PSRR over a wide frequency distribution is achieved. | 05-07-2015 |
| 20150349767 | PULSE WIDTH MODULATION CONTROL UNIT, VOLTAGE REGULATOR AND CONTROL METHOD THEREOF - A PWM control unit is provided. A comparison unit compares an output voltage with a reference voltage to generate a first compared result, and controls a voltage of a first node. A constant current source is coupled to the first node. A storage module is coupled to the first node and receives a ground voltage. A first comparator compares the output voltage with the voltage of the first node to generate a turn-on signal. A second comparator compares the voltage of the first node with the input voltage to generate an output signal. A logic gate generates a turn-off signal according to the turn-on and output signals. When each of the turn-on and output signals is at a first level, a logic gate asserts the turn-off signal at a second level. The PWM generator combines the turn-on and turn-off signals to generate a PWM signal. | 12-03-2015 |
| 20150362933 | CURRENT CONTROL APPARATUS - A current control apparatus arranged to regulate an electric current flowing between a load and an external electric circuit includes a current control loop having a current regulator arranged to manipulate an amount of the electric current flowing between the load and the external electric circuit; and a voltage control loop having a voltage regulator arranged to manipulate a voltage across the current regulator. | 12-17-2015 |
| 20160054748 | Robust Sink / Source Output Stage and Control Circuit - Multi-stage amplifiers, such as linear regulators, configured to provide a constant output voltage subject to load transients, are described. The multi-stage amplifier includes a first amplification stage which activates or deactivates a first output stage in response to an input voltage at an input node. The first output stage is configured to source a current at an output node of the multi-stage amplifier from a high potential, when activated. Furthermore, the multi-stage amplifier comprises a second amplification stage configured to activate or to deactivate a second output stage in response to the input voltage at the input node. The second output stage is configured to sink a current at the output node of the multi-stage amplifier to a low potential, when activated. The first amplification stage and the second amplification stage are configured to activate the first output stage and the second output stage in a mutually exclusive manner. | 02-25-2016 |
