Class / Patent application number | Description | Number of patent applications / Date published |
323274000 | With threshold detection | 42 |
20080278126 | VOLTAGE DOWN CONVERTER - A voltage down converter includes a voltage comparator for comparing a first reference voltage and an internal voltage to provide a first driving signal; a driving signal controller coupled with the voltage comparator, the driving signal controller configured to generate a second driving signal in response to an external voltage and selectively providing any one of the first and second driving signals; and a voltage supply coupled with the driving signal controller, the voltage supply configured to receive the selectively provided first and second driving signals, wherein the voltage supply is activated in accordance with the first or second driving signal, thereby providing the internal voltage. | 11-13-2008 |
20090066303 | VOLTAGE REGULATOR WITH TESTABLE THRESHOLDS - A system and method for determining over-voltage and under-voltage thresholds in a voltage regulator are disclosed herein. A voltage regulator includes an over-voltage detector and an under-voltage detector that determine whether the voltage regulator's regulated output voltage is above or below predetermined over-voltage and under-voltage thresholds respectively. The over-voltage detector connects to an output port that provides a signal indicating that the regulated voltage output is greater than the predetermined over-voltage threshold and not lower than the predetermined under-voltage threshold. The under-voltage detector connects to an output port that provides a signal indicating that the regulated voltage output is lower than the predetermined under-voltage threshold and not greater than the predetermined over-voltage threshold. The voltage regulator also includes an input port that provides a test signal for testing the voltage levels of the over-voltage threshold and the under-voltage threshold. | 03-12-2009 |
20090108822 | POWER SUPPLY UNIT AND PORTABLE DEVICE - A power supply unit is adapted to automatically switch its operational mode between a light load mode and a heavy load mode depending on the level of its output current. The unit has a first error amplification circuit for controlling a first output circuit in the heavy load mode, and a second error amplification circuit for controlling the second output circuit in the light load mode. The first and the second output circuits are controllably enabled and disabled in the opposite manner based on the level of the output current. Thus, the unit can operate on a reduced consumption current with an improved transient response when operating in the light load mode. | 04-30-2009 |
20090212752 | POWER SUPPLY UNIT AND PORTABLE DEVICE - A step-like operation command signal is inputted into a time-constant circuit to generate a gradually rising operation command input voltage, which is supplied to a power supply unit. Enablement and disablement of the power supply unit is controlled on the basis of the operational command input voltage. When the operation command input voltage exceeds a first predetermined voltage level, a detection signal and a reference voltage are generated, and at the same time an error amplification circuit is enabled. On the other hand, when the operation command input voltage exceeds a second predetermined voltage level, a level shift voltage for initiating a soft start is generated, which enables execution of a soft start of the power supply unit without increasing its consumption current and reduction of the number of its terminals. | 08-27-2009 |
20090243568 | METHOD AND APPARATUS FOR SYNCHRONOUS BOOST VOLTAGE REGULATORS WITH ACTIVE NEGATIVE CURRENT MODULATION - A switch-mode synchronous boost voltage regulator is disclosed that includes a boost voltage regulator and an active current modulator. The active current modulator detects a negative current flowing through the high-side switch during a light load condition. When the negative current is detected, the active current modulator is operable to maintain the high-side switch “on” in a linear mode and to limit the negative current to a predetermined current level. | 10-01-2009 |
20090243569 | METHOD AND APPARATUS FOR SYNCHRONOUS BUCK WITH ACTIVE NEGATIVE CURRENT MODULATION - A circuit is disclosed that includes a buck voltage regulator electrically coupled to an active current modulator. The active current modulator is operable to detect a negative current in the low-side switch of the buck voltage regulator circuit during a light mode operation. Whenever the negative current is detected, the active negative current modulator causes the low-side switch to stay ON in a linear mode and limits the negative current to a predetermined current level. | 10-01-2009 |
20090315525 | VOLTAGE REFERENCE DEVICE AND METHODS THEREOF - A voltage reference module of an integrated circuit device includes a current source to apply a current to a set of voltage cells, thereby generating a voltage drop across each cell. The voltage cells are configured such that the individual voltage drop associated with each cell in response to the application of the current is relatively stable over a temperature range. The voltage reference module generates a voltage based on the voltage drops across the voltage cells, and therefore the generated voltage is also stable over the temperature range. Bypass switches can be connected across each voltage cell whereby the switches can be individually opened and closed to include or exclude cells in generation of the reference voltage. In an embodiment, the switches are set during a trimming process for the integrated circuit device so that the voltage reference module provides a specified voltage. | 12-24-2009 |
20100019747 | LOW DROPOUT REGULATOR - A low dropout regulator comprises a depletion mode NMOS transistor, a switch and an error amplifier. The source electrode of the depletion type NMOS transistor is coupled to a feedback circuit. The switch, controlled by a control signal, connects a supply voltage to the drain electrode of the depletion mode NMOS transistor. The non-inverting input terminal of the error amplifier is coupled to a reference voltage. The output terminal of the error amplifier is coupled to the gate electrode of the depletion mode NMOS transistor. The inverting input terminal of the error amplifier is coupled to the feedback circuit. | 01-28-2010 |
20100156363 | Power system with temperature compensation control - The present invention discloses a power system with temperature compensation control, for selectively supplying power from an external power source or a battery to a load, or charging the battery from the external power source, the power system comprising a buck converter electrically connected between the external power source and the load, and a temperature compensation control circuit for adjusting an output voltage of the buck converter according to a sensed temperature. | 06-24-2010 |
20100259235 | Voltage Regulator with Quasi Floating Gate Pass Element - Various apparatuses, methods and systems for a voltage regulator are disclosed herein. For example, some embodiments provide an apparatus for regulating a voltage including an N-channel transistor that is connected between an input and an output, an error amplifier that is connected to the output, a capacitor that is connected between the error amplifier and a gate of the N-channel transistor, and a comparator that is connected to a node between the error amplifier and the capacitor. The apparatus also includes a charge pump that is switchably connected to the gate of the N-channel transistor. The apparatus is adapted to connect the charge pump to the gate of the N-channel transistor when a voltage at the node between the error amplifier and the capacitor rises above a threshold voltage. | 10-14-2010 |
20100264888 | DC/DC CONVERTER AND POWER SUPPLY SYSTEM - A DC/DC converter includes a first regulator supplied with a first reference potential, the first regulator outputting an output potential from an output terminal thereof, the first regulator controlling the output potential so as to be equal to the first reference potential; a second regulator supplied with a second reference potential, the second reference potential being lower than the first reference potential, an output terminal of the second regulator being connected to the output terminal of the first regulator, the second regulator controlling the output potential so as to be equal to the second reference potential; and a first comparator which compares a third reference potential and the output potential, the third reference potential being a potential between the first reference potential and the second reference potential, the first comparator putting the second regulator into an operating state under a first condition in which the output potential is lower than the third reference potential, the first comparator putting the second regulator into a stopped state under a second condition in which the output potential is higher than the third reference potential. | 10-21-2010 |
20110012573 | POWER SUPPLY CIRCUIT - A power supply circuit includes a voltage regulating module; a voltage selecting circuit and a voltage regulating chip. The voltage regulating module outputs corresponding control signals according to a type of a CPU installed on a motherboard. The voltage selecting circuit receives the control signals and converts the corresponding control signal to a voltage selecting signal. The voltage regulating chip receives the voltage selecting signal and outputs the corresponding working voltage to the CPU. | 01-20-2011 |
20110181256 | Current Controlled Current Source, and Methods of Controlling a Current Source and/or Regulating a Circuit - Current sources, systems including the current source, and methods for regulating and/or controlling a circuit using the current source. The current source is generally configured to (i) receive a reference current, a bias voltage and a feedback/input current and (ii) provide an output current. The systems generally include the current source, a circuit directly or indirectly receiving the output current, a bias source/generator configured to provide the bias voltage, and a current reference configured to sink or source a predetermined amount of current from or to the output current. The method generally includes (a) applying a bias voltage to the current source, the current source receiving an input current and providing an output current; (b) sinking or sourcing a reference current from or to the output current; (c) applying the output of the current source directly or indirectly to a regulated circuit; and (d) providing the input current from the regulated circuit. | 07-28-2011 |
20120019220 | HYBRID POWER CONVERTER - Power converter circuits, structures, and methods are disclosed herein. In one embodiment, a hybrid converter can include: (i) a first switching device controllable by a control signal; (ii) an inductor coupled to the first switching device and an output; and (iii) a control circuit configured to receive feedback from the output for generation of the control signal to control the first switching device, where the control circuit includes a first detection circuit configured to detect first and second output conditions, the control circuit being configured to operate the first switching device in a switch control in response to the control signal when the first output condition is detected, and to operate the first switching device in a linear control region when the second output condition is detected. | 01-26-2012 |
20120126762 | CURRENT LIMITING CIRCUIT AND POWER SUPPLY CIRCUIT - A current limiting circuit for limiting an output current in response to a control current includes a detection circuit to detect a detection voltage responsive to an output voltage, and a control current generating circuit to generate a control current responsive to the detection voltage, wherein the control current generating circuit includes a first transistor through which the control current flows, a second transistor that becomes conductive upon a voltage responsive to an amount of the control current being greater than a predetermined voltage above the detection voltage, and a resistor connecting between a base and an emitter of the second transistor to raise a potential at the base of the second transistor above a predetermined level, wherein the amount of the control current flowing through the first transistor decreases as an amount of a current flowing through the second transistor increases. | 05-24-2012 |
20120194149 | POWER SUPPLY CIRCUIT, CONTROL METHOD FOR CONTROLLING POWER SUPPLY CIRCUIT, AND ELECTRONIC DEVICE INCORPORATING POWER SUPPLY CIRCUIT - A power supply circuit electrically connectable to a load, including a reference voltage circuit, having a ground voltage detection element to detect a ground terminal voltage at the ground terminal of the load, to generate a reference voltage based on the detected ground terminal voltage; an error amplifier to generate a difference voltage between and the reference voltage and a load voltage detection circuit generated based on a voltage at a power supply terminal of the load; and a control circuit to control an output voltage of the power supply circuit such that the output voltage is set to a constant voltage based on the difference voltage from the error amplifier to cause a voltage between the power supply terminal and the ground terminal of the load to set to a predetermined voltage. | 08-02-2012 |
20120242308 | PROTECTION SYSTEM AND METHOD FOR DC-DC CONVERTERS EXPOSED TO A STRONG MAGNETIC FIELD - A protection system and method for protecting a direct current to direct current voltage converter (DC-DC converter) from a potentially damaging excessive output current due to exposure to a relatively strong magnetic field is disclosed. The system includes a detector circuit configured to monitor a signal characteristic of the DC-DC converter, and a linear regulator having an output coupled to the load output of the DC-DC converter. The system further includes a control system configured to disable a load output of the DC-DC converter and enable the output of the linear regulator when the detector detects that the signal characteristic has moved outside a predetermined threshold range. Moreover, the control system is further configured to disable the output of the linear regulator after a predetermined time period, and enable the load output of the DC-DC converter after the predetermined time period. | 09-27-2012 |
20130002216 | POWER SUPPLY MODULE,ELECTRONIC DEVICE INCLUDING THE SAME AND POWER SUPPLY METHOD - A power supply module and a power supply method corresponding to an electronic device. The power supply module includes a low-dropout (LDO) voltage regulator to adjust an input signal received from a battery and output a stabilized output signal, and an external load calculation circuit to calculate an external load value at a power output node of the LDO voltage regulator and stabilize the output signal based on the external load value. | 01-03-2013 |
20130076323 | DYNAMIC DROPOUT CONTROL OF A POWER SUPPLY - A power supply uses a power converter to generate a regulated voltage by referencing to a first DC voltage, a low dropout (LDO) regulator to generate an output voltage from the regulated voltage by referencing to a second DC voltage, and a reference voltage generator to dynamically adjust the first DC voltage according to the input voltage and the control voltage of the output transistor of the LDO regulator. The dropout voltage of the LDO regulator can be minimized to maintain the high efficiency of the power supply at different loading or selected output voltages. | 03-28-2013 |
20130082671 | Low noise voltage regulator and method with fast settling and low-power consumption - A voltage regulator controls a regulated output voltage (Vout) by feeding it back to a differential input stage ( | 04-04-2013 |
20130113446 | POWER SUPPLY WITH INTEGRATED VOLTAGE CLAMP AND CURRENT SINK - Various exemplary embodiments relate a system and method for supplying power. The system may include an input/output port, a regulator, and a clamp. The regulator may supply power to the input/output port in a first mode, sink current from the input/output port in a second mode, and be disabled in a third mode. The clamp may be disabled in the first and second modes, and may limit the voltage at the input/output port below a first value in the third mode. | 05-09-2013 |
20130162233 | SINGLE FEEDBACK LOOP FOR PARALLEL ARCHITECTURE BUCK CONVERTER - LDO REGULATOR - An embodiment of a voltage regulation circuit includes a DC-DC converter configured to control a first current provided from a source to a load via a first output, and a linear regulator configured to control a second current provided from the source to the load via a second output. The voltage regulation circuit further includes a single control loop configured to receive an output voltage across the load and a first reference voltage. The single control loop is further configured to generate a single error signal between the output voltage across the load and the first reference voltage and to control the DC-DC converter and the linear regulator using the single error signal such that when the single error signal is outside of a predetermined range the DC-DC converter provides the first current to the load and the linear regulator provides the second current to the load simultaneously. | 06-27-2013 |
20130176009 | SMART LOW DROP-OUT VOLTAGE REGULATOR AND ASSOCIATED METHOD - The present disclosure discloses a low drop-out voltage regulator and an electronic device comprising the same. The present disclosure also discloses a method for converting a power supply voltage to a regulated output voltage. The low drop-out voltage regulator comprises a pass device controllable to convert a power supply voltage to a regulated output voltage; and a controller configured to receive an input signal and to provide a driving signal to the control terminal of the pass device based on the input signal, wherein when the input signal is within a predetermined range, the driving signal turns the pass device ON, and the power supply voltage charges the output voltage; and wherein when the input signal is without the predetermined range, the driving signal turns the pass device OFF, and the power supply voltage stops charging the output voltage. | 07-11-2013 |
20130214752 | Low-noise, high bandwidth quasi-resonant mode switching power supply - High bandwidth, low noise switching power supply operating in quasi-resonant mode for filtering switching harmonic noise, while providing a fast control bandwidth and power at high efficiency. The power supply has an LCL tank defining a resonance period T | 08-22-2013 |
20130300386 | INTEGRATED CIRCUIT DEVICE, VOLTAGE REGULATION CIRCUITRY AND METHOD FOR REGULATING A VOLTAGE SUPPLY SIGNAL - An integrated circuit (IC) device is provided that includes at least one internal voltage regulator arranged to receive a voltage supply signal at a first input thereof, receive a control signal at a second input thereof, regulate the received voltage supply signal in accordance with the received control signal, and provide a regulated voltage supply signal at an output thereof. The IC device further includes at least one voltage regulation power control module operably coupled to the second input of the at least one internal voltage regulator and arranged to provide the control signal thereto. The voltage regulation power control module is further arranged to receive at least one IC device conditional indication, and generate the control signal for the at least one internal voltage regulator based at least partly on an available thermal power budget for the IC device corresponding to the at least one IC device conditional indication. | 11-14-2013 |
20130307501 | METHOD OF FORMING A POWER SUPPLY CONTROLLER AND STRUCTURE THEREFOR - In one embodiment, a method of forming a power supply controller may include configuring the power supply controller to control a pass transistor to form an output current responsively to a control signal and independently of the value of the output voltage until the control signal is less than a deviation from a desired value of the output voltage. | 11-21-2013 |
20130320942 | VOLTAGE REGULATOR CIRCUIT WITH ADAPTIVE CURRENT LIMIT AND METHOD FOR OPERATING THE VOLTAGE REGULATOR CIRCUIT - A voltage regulator circuit and a method for operating the voltage regulator circuit are described. In one embodiment, a voltage regulator circuit includes an input terminal to receive an input signal from a power interface, an output terminal to output an output signal using the input signal, an output voltage monitor circuit configured to compare the voltage of the output signal with a predetermined voltage threshold, and a current limit circuit configured to limit current flowing on a path from the input terminal to the output terminal to a transient current limit level. The transient current limit level is lower than a predefined current limit threshold of the power interface. Other embodiments are also described. | 12-05-2013 |
20140117956 | METHOD AND APPARATUS FOR LDO AND DISTRIBUTED LDO TRANSIENT RESPONSE ACCELERATOR - A transient response accelerated (TRA) low dropout (LDO) regulator has an error amplifier having a feedback input, and a reference input configured to receive a reference voltage, and an output that controls a pass gate. The pass gate output voltage is applied to the feedback input. A transient response accelerator (TRA) circuit detects a rapid voltage drop on the pass gate output and, in response, applies a pulse control that rapidly lowers the resistance of the pass gate. | 05-01-2014 |
20140184183 | SEMICONDUCTOR DEVICE AND ELECTRIC CONTROL DEVICE - A semiconductor device includes: an output transistor; and a current detection section. The output transistor controls electric power supply from an electric power source to a load. The current detection section detects a current flowing through the output transistor. The current detection section has a current detection characteristic in which a current detection value has approximately linier and negative dependence on a drain-source voltage of the output transistor. | 07-03-2014 |
20140184184 | VOLTAGE DETECTING CIRCUIT AND VOLTAGE REGULATOR APPARATUS PROVIDED WITH SAME - A voltage detecting circuit including: a first current source including a first terminal connected to a first voltage input terminal; a second current source including a first terminal connected to ground potential VSS; and a first transistor including a first main terminal connected to a second terminal of the first current source, a second main terminal connected to a second terminal of the second current source and a detection output terminal, and a control terminal connected to a second voltage terminal. The first and the second current sources are configured such that a logic level of a detection output signal is determined based on whether one voltage applied to the first voltage terminal is higher or lower than a voltage obtained by adding a voltage of a difference between the first main terminal and control terminal of the first transistor to the other voltage applied to the second voltage terminal. | 07-03-2014 |
20140210439 | Switching Regulator and Control Circuit Thereof - The present invention discloses a switching regulator and a control circuit thereof. The switching regulator includes a boost or buck-boost power stage, a first operation circuit and a bypass circuit. The power stage controls at least one power transistor switch included therein according to a first operation signal, to convert an input voltage to an output voltage at an output terminal. The first operation circuit generates the first operation signal in response to the output voltage or a related signal thereof. The bypass circuit includes a bypass transistor and a second operation circuit. When it is required to provide power to the output terminal promptly, the second operation circuit turns ON the bypass transistor, and when the input voltage is equal to the output voltage or equal to a sum of the output voltage plus a safety offset value, the second operation circuit turns OFF the bypass transistor. | 07-31-2014 |
20140266103 | DIGITALLY ASSISTED REGULATION FOR AN INTEGRATED CAPLESS LOW-DROPOUT (LDO) VOLTAGE REGULATOR - Techniques are described that embed a digital assisted regulator with an LDO regulator on a chip without requiring a capacitor external to the chip and to regulate a voltage without undershoot. The digital assisted regulator responds to information regarding operation of the LDO regulator and to a signal that provides advance notification of a load change. When the advance notification signal is received, the digital assisted regulator pulls a circuit's supply voltage up to a chip's incoming supply voltage. When the correct operating voltage has been reached and any undershoot problem removed, the digital assisted regulator balances the current it provides with the current provided by the LDO regulator, to allow a quick response time for other load changes. Also, bandwidth of an LDO regulator may be expanded by use of an advance notice signal to increase bias current of an LDO output device to meet an upcoming load change. | 09-18-2014 |
20140285165 | LOW-DROPOUT VOLTAGE REGULATOR APPARATUS CAPABLE OF ADAPTIVELY ADJUSTING CURRENT PASSING THROUGH OUTPUT TRANSISTOR TO REDUCE TRANSIENT RESPONSE TIME AND RELATED METHOD THEREOF - A low-dropout voltage regulator apparatus includes a voltage source circuit, an error amplifier, an output transistor, a resistor-capacitor circuit, a detection circuit, and a current adjusting circuit. The voltage source circuit generates a reference voltage signal and at least one threshold voltage signal. The error amplifier receives the reference voltage signal and a feedback voltage signal to generate an output control signal. The output transistor provides an output current for the output terminal according to the output control signal. The resistor-capacitor circuit generates the feedback voltage signal using voltage dividing according to a voltage corresponding to the output current. The detection circuit compares at least one threshold voltage signal with the output voltage to generate at least one control voltage signal. The current adjusting circuit adaptively adjusts the current passing though the output transistor to decrease the transient response time according to the at least one control voltage signal. | 09-25-2014 |
20150042300 | VOLTAGE REGULATOR WITH SWITCHING AND LOW DROPOUT MODES - A voltage regulator includes an input terminal, an output terminal, a control circuitry, a buck mode switching converter, and a low dropout regulator circuit. The buck mode switching converter is arranged to convert a voltage signal received at the input terminal to a first voltage signal at the output terminal responsive to a first predetermined signal output from the control circuitry. The buck mode switching converter includes an electronically controlled switch in communication with an energy storage element. The low dropout regulator circuit is coupled between the input terminal and the output terminal and includes a linear circuit and is arranged to control a voltage drop across the linear circuit so as to provide a second voltage signal at the output terminal responsive to a second predetermined signal output from the control circuitry. | 02-12-2015 |
20150130433 | CONSTANT POWER AVAILABILITY FOR LOAD SWITCHES WITH FOLDBACK CURRENT - Load switch supply circuits and methods are provided that allow a load switch to maintain power delivery without having the load switch encounter thermal or power overload conditions. In an example, a load switch supply circuit can include a multiplier circuit configured to receive a first representation of voltage across a load switch and a representation of current provided by the load switch and to provide a representation of power dissipated by the load switch, and a control amplifier configured to compare the representation of power dissipated by the load switch to a power threshold and to adjust a control terminal of the load switch to avoid cycling the load switch to an off state due to thermal overload or power overload conditions. | 05-14-2015 |
20150309518 | CHARGE PUMP LDO WITH SECONDARY SENSING FOR LOW POWER NEED BASED REFRESH - A voltage regulation system includes a voltage regulator configured to output a control signal indicating whether a voltage based on output of the voltage regulator is lower than a specified value. A charge pump is configured to output a voltage and a charging current. A pump monitor is configured to receive the control signal and the output voltage of the charge pump, and activate the charge pump when the control signal indicates the voltage based on output of the voltage regulator is lower than a specified value and the output voltage of the charge pump is lower than a threshold value. | 10-29-2015 |
20150346749 | System and Method for a Linear Voltage Regulator - In accordance with an embodiment, a method of operating a power supply includes measuring an output signal of the power supply, determining a control voltage based on the measured output signal, and determining whether a supply voltage of a voltage follower circuit is greater than a first threshold. When the supply voltage of the voltage follower circuit is greater than the first threshold, the control voltage is applied to an input of the voltage follower circuit and an output of the voltage follower circuit is applied to a control node of an output transistor in a first mode. When the supply voltage of the voltage follower circuit is not greater than the first threshold, the voltage follower circuit is shut down and the control voltage is applied to the control node of the output transistor in a second mode. | 12-03-2015 |
20160026199 | LDO AND LOAD SWITCH SUPPORTING A WIDE RANGE OF LOAD CAPACITANCE - An architecture and method to maintain stability of a low drop-out (LDO)/load switch linear voltage regulator (LVR). The architecture method support optionally determining during a power-up phase and by using a load detection circuit, the estimated load parameters that represents at least one selected from a group consisting of: the load time constant and the load resistor at an output node of the LDO/load switch LVR, and adjusting, based on the estimated output load parameters, an adaptive RC network in the LDO/load switch LVR, wherein the adaptive RC network produces an adaptive zero in a feedback network transfer function of the LDO/load switch LVR, wherein the adaptive zero reduces an effect of a non-dominant pole in the open loop transfer function of the LDO/load switch LVR, and wherein a frequency of the adaptive zero is adjusted based on the estimated load parameters. | 01-28-2016 |
20160028307 | HIGH SIDE SWITCH WITH CURRENT LIMIT FEEDBACK - Methods, devices, systems, and integrated circuits are disclosed for switching on an electrical connection to one or more loads. In one example, a switch device includes a voltage source, a power switch circuit block connected to the voltage source, and a current limitation circuit block connected to the voltage source and the power switch circuit block. The switch device further includes a voltage outlet connected to the power switch circuit block. The switch device further includes a current limit feedback circuit connected to the power switch circuit block and the current limitation circuit block. The current limit feedback circuit is configured to enable the switch device to provide a regulated connection between the power switch circuit block and the voltage outlet, wherein the regulated connection defines a current limitation mode, such that the regulated connection reduces the current in the power switch circuit block if the switch device is in the current limitation mode. | 01-28-2016 |
20160091908 | SENSED SWITCH CURRENT CONTROL - A circuit includes an evaluation node through which current flows from a voltage source node to a sensed switch when the sensed switch is closed. First and second control switches are disposed between the voltage source node and the evaluation node to switch between first and second current paths for the current. The current passes through the first control switch when flowing along the first current path. The second control switch is coupled to a control terminal of the first control switch to deactivate the first control switch and allow the current to flow through the second current path. Multiple passive circuit elements are configured to establish first and second current levels for the current. The passive circuit elements are disposed between the voltage source node and the evaluation node in a circuit arrangement in which no current path to ground is present when the sensed switch is open. | 03-31-2016 |
20160099641 | CONVERTER - In a converter, the source of a first FET and the drain of a second FET are connected to one end of an inductor while the source of a third FET and the drain of a fourth FET are connected to the other end of the inductor. The sources of the first FET and the second FET are connected to each other. The cathode and the anode of a diode are connected respectively to the drain and the source of the third FET. Then, the first FET, the second FET, the third FET and the fourth FET are turned ON/OFF individually so that a voltage applied by a battery is converted. When voltage conversion is to be terminated, OFF-state of the third FET is maintained. Then, during the time that the OFF-state of the third FET is maintained, an electric current is reduced that flows from the drain of the third FET through a storage battery to the source of the fourth FET. | 04-07-2016 |
20170237345 | CURRENT MODE SWITCHING REGULATOR AND OPERATING METHOD WITH OFFSET CIRCUITRY TO EMULATE A TRANSIENT LOAD STEP RESPONSE | 08-17-2017 |