| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 327110000 | Having inductive load (e.g., coil, etc.) | 28 |
| 20080246518 | Method for driving a transistor half-bridge - A method drives a transistor half-bridge. The method includes measuring a delay time between an edge of an input signal and an corresponding edge of a phase signal, and saving the delay time as a saved delay time value. The phase signal is the output of the transistor half-bridge. In the method, the following steps are repeated until the saved delay time value differs from the delay time by more than a given threshold:
| 10-09-2008 |
| 20080309382 | MOSFET for synchronous rectification - This invention discloses a new MOSFET device. The MOSFET device has an improved operation characteristic achieved by connecting a shunt FET of low impedance to the MOSFET device. The shunt FET is to shunt a transient current therethrough. The shunt FET is employed for preventing an inadvertent turning on of the MOSFET device. The inadvertent turning on of the MOSFET may occur when a large voltage transient occurs at the drain of the MOSFET device. By connecting the gate of the shunt FET to the drain of the MOSFET device, a low impedance path is provided at the right point of time during the circuit operation to shunt the current without requiring any external circuitry. | 12-18-2008 |
| 20090066375 | Switching control system and motor driving system - The present invention inexpensively controls a turn-on and turn-off switching speed for MOS transistors made in accordance with various specifications. According to the present invention, during an output voltage rise period for a turn-on operation of the MOS transistor, a fixed current determined by a first clip circuit and a resistor is input to a gate terminal of the MOS transistor to obtain a linear rise slew rate. During an output voltage drop period for a turn-off operation of the MOS transistor, a fixed current determined by a second clip circuit | 03-12-2009 |
| 20090184738 | Drive circuit for reducing inductive kickback voltage - In one embodiment a drive circuit includes two comparators which are adapted to sense kickback voltage generated in an inductive load and conduct two field-effect transistors connected to ground in a very short period of time so as to quickly reduce the kickback voltage to a minimum value. In another embodiment only one comparator is provided. | 07-23-2009 |
| 20090322383 | SEMICONDUCTOR DEVICE, SIGNAL TRANSMITTER, AND SIGNAL TRANSMISSION METHOD - A semiconductor device is provided with a plurality of semiconductor chips and at least one transmission coil ( | 12-31-2009 |
| 20100073039 | H-Bridge circuit - An H-bridge circuit includes a lower-arm field-effect transistor and a current supplying element that turns on when the drain of the lower-arm field-effect transistor is negatively biased due to regenerative current. When turned on, the current supplying element conducts current from the source to the drain of the lower-arm field-effect transistor, in parallel with a parasitic diode inherent in the lower-arm field effect transistor. The current supplying element competes with other parasitic elements that conduct current from peripheral circuitry to the drain of the lower-arm field-effect transistor, thereby reducing the amount of such current drawn through the peripheral circuitry and lessening the impact of the regenerative current on the peripheral circuits. | 03-25-2010 |
| 20100148831 | BUFFER WITH REMOTE CASCODE TOPOLOGY - A buffer circuit is described for buffering signals between a circuit element and a load. The buffer includes a main transistor and a cascode transistor, as well as a distribution line for transferring signals over a distance between the circuit element and the load. The buffer is arranged in a remote cascode topology such that the cascode transistor is located substantially adjacent to the load and remote from the main transistor. The distribution line transfers signals over the distance from the main transistor to the cascode transistor. This remote cascode topology makes it possible to significantly reduce the power consumption of the buffer—as compared to conventional buffers—while maintaining the maximum bandwidth possible. | 06-17-2010 |
| 20100201407 | DRIVER CHIP FOR DRIVING AN INDUCTIVE LOAD AND MODULE HAVING A DRIVER CHIP - A driver chip for driving an inductive load and a module having a driver chip are provided. The driver chip contains a first transistor for coupling a first potential to a first output and a second transistor for coupling a second potential to the first output. A first protection circuit reduces an increased voltage between a control terminal and a load junction terminal of the first transistor. The driver chip has a first state in which the second transistor is turned off and the first transistor can switch a passive inductive load connected to the output. In a second state, the first transistor and the second transistor can switch an external power transistor connected to the first output. A second output is connected to a load junction terminal of the external power transistor. A second protection circuit reduces an increased voltage between the first and second outputs. | 08-12-2010 |
| 20110234264 | Load Driver - A method for driving a load includes driving a load to an initial voltage within a voltage window, the voltage window based on an input voltage and an offset voltage, and driving the load to approximately the input voltage. | 09-29-2011 |
| 20110279152 | LOAD DRIVING DEVICE - Malfunction attributable to an induced electromotive force such as a back electromotive force or a regenerative braking force of an inductive load in a load driving device is prevented. When an on-state current flows in an output transistor, a second transistor applies a supply voltage applied to a source of the output transistor to a back gate of the first transistor. On the other hand, when a negative current flows in the output transistor in a direction opposite to that of the on-state current, the second transistor applies a supply voltage applied to a drain of the output transistor to the back gate of the first transistor. | 11-17-2011 |
| 20120007637 | LOAD DRIVER SYSTEM - A first driver device and a first diode are connected in parallel between an output node and a first voltage node. A second driver device and a second diode are connected in parallel between the output node and a second voltage node. When a first switching time comes, a first drive control section switches the first driver device from the off state to the on state after detecting that an output voltage at the output node reaches a predetermined first reference voltage. When a second switching time comes, the first drive control section switches the first driver device from the on state to the off state. A second drive control section switches the second driver device from the on state to the off state when the first switching time comes, and switches the second driver device from the off state to the on state when the second switching time comes. | 01-12-2012 |
| 20120038393 | Mode Dependent Driving of the Center Tap in Ethernet Communications - An output stage comprising a current mode line driver, a voltage mode line driver, and a center-tapped transformer for coupling data provided by the line drivers to a transmission line is provided herein. The output stage is configured to operate in a backwards compatible Ethernet communication device. For example, the Ethernet communication device is configured to support 10G Ethernet and legacy Ethernet modes of 10BASE-T, 100BASE-T, and 1000BASE-T. The current mode line driver can be utilized while operating in the 10G Ethernet mode to provide high linearity. The voltage mode line driver can be utilized while operating in legacy mode to conserve power. In order to accommodate the use of two different line drivers, a switch and/or a voltage regulator is used to couple/decouple a dc voltage to a center-tap of the transformer based on which of the two different line drivers is currently active. | 02-16-2012 |
| 20120068740 | VOLTAGE OUTPUT CIRCUT - According to one embodiment, a voltage output circuit is disclosed. The circuit has: a transistor connected between a first terminal and a second terminal, the transistor having a gate connected to a first node and being switched in accordance with control signal; a first pull-up circuit configured to pull-up the first node voltage when the control signal is first level; a pull-down circuit configured to pull-down the first node voltage when the control signal is second level; a monitor configured to cause a second node voltage to be second level when a difference between the input voltage and the first node voltage is larger than a reference voltage; and a second pull-up circuit configured to pull-up the first node voltage when the control signal is first level and also the second node voltage is second level. | 03-22-2012 |
| 20120074989 | INDUCTIVE LOAD DRIVING DEVICE - An inductive load driving device includes a first switching element, a second switching element, a counter current regeneration circuit, and a circuit element protection circuit. The first switching element is coupled between an output terminal of the power circuit and one end of the inductive load. The second switching element is coupled between the other end of the inductive load and a ground terminal. The counter current regeneration circuit is configured to supply to the output terminal of the power circuit, a counter current output from the other end of the inductive load when the first and second switching elements are in off-state. The circuit element protection circuit is configured to turn on the second switching element when a value of the output voltage of the power circuit becomes equal to or more than a threshold value. | 03-29-2012 |
| 20120242377 | Re-Driver with Pre-Emphasis Injected Through a Transformer and Tuned by an L-C Tank - A re-driver circuit has pre-driver, intermediate, and output stages. Pre-emphasis on the output is generated by the intermediate stage and injected into an output stage. The intermediate stage is a frequency-tuned amplifier that has an inductive-capacitive L-C tank circuit that is tuned to a desired frequency of the output. The intermediate stage does not directly drive the output stage. Instead, an on-chip coupling transformer couples the L-C tank circuit to the output stage. The coupling transformer has a first inductor that is part of the L-C tank circuit in the intermediate stage, and a second inductor that is part of the output stage. Mutual inductance between the first inductor and the second inductor inductively couple a pre-emphasis voltage onto the output. The magnitude of the pre-emphasis can be changed by adjusting current in the intermediate stage. | 09-27-2012 |
| 20120319743 | SIGNAL TRANSMITTING APPARATUS - A signal transmitting apparatus that may suppress generation of a noise voltage attributable to a common mode voltage is provided. A transistor P1 is connected between a first terminal of a sending coil and a power supply voltage. A transistor N1 is connected between the first terminal and a ground voltage. A transistor P2 is connected between a second terminal of the sending coil wand the power supply voltage. A transistor N2 is connected between the second terminal and the ground voltage. In a period-PE1, a coil current flowing in a positive direction is generated by turning on the transistors P1 and N2 and turning off the transistors P2 and N1, and then the transistor N1 is turned on in response to turning off the transistor P1. In a period PE2, a coil current flowing in a negative direction is generated by turning off the transistors P1 and N2 and turning on the transistors P2 and N1, and then the transistor N2 is turned on in response to turning off the transistor P2. | 12-20-2012 |
| 20120319744 | METHOD AND APPARATUS FOR SIMPLIFYING THE CONTROL OF A SWITCH - A half bridge converter includes a transformer with a high side switch coupled between a first input terminal and a primary winding of the transformer. A low side switch is coupled between a second input terminal and the primary winding. A first control circuit is coupled to the first input terminal and the primary winding to control the high side switch in response to a rate of voltage change with respect to time across the high side switch while the high side switch is off. A second control circuit coupled to the primary winding and the second input terminal to control the low side switch in response to a rate of voltage change with respect to time across the low side switch while the low side switch is off. | 12-20-2012 |
| 20130049819 | Method and Control Unit for Controlling an Electrical Component - An electrical component having a primary winding, a first field-effect transistor, configured as a switch of the primary winding, for switching the primary winding, a quench winding for quenching the inductive load of the primary winding when switching off the primary winding, and a second field-effect transistor, configured as a switch of the quench winding, for switching the quench winding. In the process, the first field-effect transistor is operated in linear operation and the second field-effect transistor is operated in linear operation or in a clock-pulsed operation between the linear operation and a switched-off state during a switching-off process of the quench winding. | 02-28-2013 |
| 20130141141 | DRIVER CIRCUIT FOR TRANSMITTING COIL OF ACTIVE ANTIMAGNETIC CARD COPYING DEVICE - The present invention relates to a driver unit that locates the transmitter, which transmits magnetic field around the card insertion slot in order to prevent fraud in self-service terminals (SST) such as ATM, which enables transactions with magnetic tape cards. | 06-06-2013 |
| 20130169323 | ADAPTIVE NON-POSITIVE INDUCTOR CURRENT DETECTOR (ANPICD) - Systems and methods are disclosed to detect current for an output load with an inductor. The system includes a high side power transistor a low side power transistor coupled to the high side power transistor; and a controller coupled to the high and low side power transistors. | 07-04-2013 |
| 20130278301 | Power Management Integrated Circuit for Driving Inductive Loads - A power management integrated circuit includes pairs of high-side and low-side drivers, sensing circuitry, and a processor. The high-side and low-side drivers are used in combination with external discrete NFETs to drive multiple windings of a motor. The N-channel LDMOS transistor of each high-side driver has an associated isolation structure and a tracking and clamping circuit. If the voltage on a terminal of the integrated circuit pulses negative during a switching of current flow to the motor, then the isolation structure and tracking and clamping circuit clamps the voltage on the isolation structure and blocks current flow from the substrate to the drain. An associated ESD protection circuit allows the voltage on the terminal to pulse negative. As a result, a large surge of current that would otherwise flow through the high-side driver is blocked, and is conducted outside the integrated circuit through a body diode of an external NFET. | 10-24-2013 |
| 20130285713 | POWER STAGE - A power stage has a differential output stage | 10-31-2013 |
| 20140152353 | POWER STAGE - A power stage has a differential output stage | 06-05-2014 |
| 20140184280 | LOAD DRIVER - A method of driving an output terminal to a voltage, in which an input signal is received, an appropriate output voltage and output voltage range are determined based on the input signal, an output driver is configured to a first mode and the output driver drives the output terminal to a voltage within the voltage range, the output driver is configured to a second mode and the output driver drives the output terminal to a voltage approximately equal to the appropriate output voltage. | 07-03-2014 |
| 20140240008 | Output Driver for Energy Recovery from Inductor Based Sensor - A system for recovering energy from a sensor couples a battery to an inductive device in the sensor for a period of time, such that a current flows through the inductive device from the battery during the time period. The connections of the inductive device are then reversed for a second period of time. During the second time period, a current flow resulting from energy stored in the inductor is allowed to flow back to the battery, such that a portion of the energy from the inductor recharges the battery during the second period of time. | 08-28-2014 |
| 20140253186 | Inductive Load Driver Slew Rate Controlller - A circuit and method for digital controlling the slew rate of load voltage are provided. The circuit is comprised of a digital slew-rate control unit that utilizes a feedback signal to generate control signals where the feedback signal indicates the observed rate of voltage change on the load. The circuit is further comprised of a load driver circuit that is operated by the control signals and provides a slew-rate controlled output voltage used to operate a load switch, where the load switch provides power to the load. The circuit is configured to operate the load switch using a slew-rate controlling driver, depending on the state of the load switch transition, and a non-controlling driver. | 09-11-2014 |
| 20150022248 | SEMICONDUCTOR DEVICE AND DRIVING SYSTEM - An output MOS transistor has a drain connected with a power supply and a source connected with an output terminal. The short-circuit MOS transistor has a source connected with the output terminal. The short-circuit MOS transistor is formed in a semiconductor substrate connected with the power supply. A switching device is formed in a semiconductor region which is formed in the semiconductor substrate, and contains a first diffusion layer connected with the gate of the output MOS transistor and a second diffusion layer formed in the semiconductor region and connected with the drain of the short-circuit MOS transistor. | 01-22-2015 |
| 20160006434 | LOAD DRIVER - A method for driving a load includes driving a load to an initial voltage within a voltage window, the voltage window based on an input voltage and an offset voltage, and driving the load to approximately the input voltage. | 01-07-2016 |
