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| Number | Title | Issue Date |
| 8149027 | Circuit with a voltage dependent resistor for controlling an on/off state of a transistor An H-bridge circuit formed from two sub-circuits coupled to each other by a load network across a respective load node of each of the sub-circuits. Each sub-circuit of the two sub-circuits comprises a depletion mode upper transistor with a second electrode coupled t... | 04/03/2012 |
| 8072246 | Switching power supply device, semiconductor integrated circuit device and power supply device A switching power supply device performs a stable operation with fast response for a semiconductor integrated circuit device. A capacitor is provided between the output side of an inductor and a ground potential. A first power MOSFET supplies an electric current fro... | 12/06/2011 |
| 8063672 | Method and apparatus for simplifying the control of a switch A technique for simplifying the control of a switch is presented. In one embodiment, a method of controlling a switch as a function of the voltage across the switch is presented. In one embodiment a method of controlling a switch as a function of the slope of the vo... | 11/22/2011 |
| 7994826 | Drive circuit for power semiconductor switching device A gate driving circuit for a voltage-driven power semiconductor switching device has (a) the voltage-driven power semiconductor switching device, (b) a driving circuit for supplying a drive signal to the gate electrode of the switching device, and (c) an inductance ... | 08/09/2011 |
| 7994827 | MOSFET gate drive with reduced power loss A gate driver for a power MOSFET in, for example, a DC-DC converter switches the MOSFET between a fully-on condition and a low-current condition instead of switching the MOSFET between fully-on and fully-off conditions. The amount of charge that must be transferred ... | 08/09/2011 |
| 7969208 | Control circuit for a power semiconductor assembly and power semiconductor assembly Disclosed is a control circuit for controlling a controllable power semiconductor switch, and to a power semiconductor module. The control circuit comprises at least two circuit sets, each having a power driver. The power driver of each of the circuit sets is provid... | 06/28/2011 |
| 7961015 | Transceiver and method for operating the transceiver The transceiver features a fast de-excitation circuit, by means of which the transceiver can be very quickly de-energized or de-excited after sending of signals. The fast de-excitation circuit can be realized in the simplest case as a controllable switch with series... | 06/14/2011 |
| 7940092 | Gate driver circuit for H bridge circuit An H bridge circuit includes a gate driver circuit coupled to a gate of an NMOS device. The output of the gate driver circuit is at a voltage from 0.1V to 0.4V during a dead time of the H bridge circuit. The gate voltage of the NMOS device is biased at 0.1˜0.4V to ... | 05/10/2011 |
| 7902884 | 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 con... | 03/08/2011 |
| 7888977 | Electronic device for supplying DC power An electronic device for delivering DC power includes a load, a power end, an upper gate switch including a first end coupled to the power, a second end, and a third end, for conducting connection between the first and third ends according to the signal level of the... | 02/15/2011 |
| 7812647 | MOSFET gate drive with reduced power loss A gate driver for a power MOSFET in, for example, a DC-DC converter switches the MOSFET between a fully-on condition and a low-current condition instead of switching the MOSFET between fully-on and fully-off conditions. The amount of charge that must be transferred ... | 10/12/2010 |
| 7795930 | Drive control apparatus for controlling drive of inductive load and drive control method for controlling the same A drive control apparatus controls a drive of an inductive load having a current flowing therethrough. The drive control apparatus includes a drive control device for controlling a variation of the current flowing through the inductive load within a certain period b... | 09/14/2010 |
| 7782100 | Driving a full bridge circuit A full bridge that produces an alternating output signal can be driven by operating switching elements of the full bridge in each period in a switching sequence that determines the order of the activation and deactivation of the switching elements. The switching ele... | 08/24/2010 |
| 7724046 | High side/low side driver device for switching electrical loads An integrated circuit device for switching electrical loads that have an inductive component comprises at least one switching channel that includes a power stage with a power MOS transistor and a driver circuit for driving the gate of the power MOS transistor, the s... | 05/25/2010 |
| 7714624 | Method for controlling vertical type MOSFET in bridge circuit A method for controlling a vertical type MOSFET in a bridge circuit is provided to reduce diode power loss and improve a reverse recovery characteristic. The method includes controlling a forward voltage of a built-in diode of the vertical type MOSFET to be a first ... | 05/11/2010 |
| 7705638 | Switching control circuit with reduced dead time A switching control circuit of synchronous rectification type that is capable of reducing dead time is obtained. Upon detection that an output potential rises above VDD-Va, a first sensor outputs an H signal to a first input terminal of a first NOR circuit, and the ... | 04/27/2010 |
| 7671639 | Electronic circuit In the case of an electronic circuit, comprising a drive unit, which generates at least one drive signal, two or more power semiconductor switches each having a first and a second main terminal, which power semiconductor switches can be switched synchronously by the... | 03/02/2010 |
| 7642819 | High speed current mode write driver An integrated circuit (100) includes a current mode write driver (105). The write driver (105) includes a switching control circuit (110) including (i) a DC current control circuit (111) operable to directly convert a received ECL ... | 01/05/2010 |
| 7570087 | Switching drive circuit for soft switching A switching drive circuit for soft switching is disclosed. It includes an input circuit to receive an input signal. A first delay circuit generates a first delay time in response to the enable of the input signal. A second delay circuit generates a second delay time... | 08/04/2009 |
| 7551008 | Circuit for fixing peak current of an inductor and method thereof The circuit for fixing the peak current of an inductor includes an operating current, a ramp-type boost converter and a comparator. The magnitude of the operating current is proportional to that of the voltage source of the inductor. The ramp-type boost converter is... | 06/23/2009 |
| 7548097 | Flyback current control One embodiment of the invention includes a power driver system. The power driver system comprises a power transistor that is activated to provide power to a load and a switching circuit configured to control the power transistor based on a control signal. The power ... | 06/16/2009 |
| 7535268 | Inductive load driving system In an inductive load driving system, it is configured to comprise a first switching element that is inserted in a position between the external power supply and the inductive load, a second switching element that is inserted in a position between the inductive load ... | 05/19/2009 |
| 7518416 | Method and apparatus for detecting switching current of magnetic device operated in continuous current mode The present invention provides a method and apparatus for detecting a continuous current of a switching current. A current signal is produced in response to a switching current of the magnetic device. By sampling the waveform of the current signal in response to the... | 04/14/2009 |
| 7466169 | Signal detecting device and method for inductive load A signal detecting device detects, as analog voltage signals, a current flowing through an exciting coil of an electric power generator, a source voltage and a temperature of a regulator that change as a current is fed to the exciting coil by an FET. These analog vo... | 12/16/2008 |
| 7463071 | Level-shift circuit utilizing a single level-shift switch A level-shift circuit for use with a half bridge in accordance with an embodiment of the present application includes an oscillator operable to provide a timing signal, a level-shift switch controlled by the timing signal of the oscillator, a high side control circu... | 12/09/2008 |
| 7453292 | Resonant gate drive circuit with centre-tapped transformer This invention relates to a resonant gate drive circuit for a power switching device, such as a MOSFET, that uses a center-tapped transformer to increase the driving gate voltage approximately twice as high as the supply voltage. The gate capacitance of the power sw... | 11/18/2008 |
| 7443211 | Transmitter and transmission circuit Transmitter and transmission circuit. For realizing a differential transmitter, a switch circuit is connected between two load transistors of two complementary MOS pairs. The switch circuit can have two inductors. When the two complementary MOS pairs are conducting ... | 10/28/2008 |
| 7417817 | Write driver circuit for magnetic data storage systems A write driver circuit for a magnetic storage medium includes a first write driver sub-circuit that has an output that communicates with a first node of a write head. The first write driver circuit includes a first driver circuit and a first feedback path between th... | 08/26/2008 |
| 7408313 | Low power preamplifier writer architecture A circuit is adapted to activate a writer head of a data storage media drive during both the boost periods as well as the steady state periods. The current supplied to the writer head during the boost periods exceeds the steady state current and flows between positi... | 08/05/2008 |
| 7408388 | Switching power supply device, semiconductor integrated circuit device and power supply device There are provided a switching power supply device performing a stable operation with fast response, a semiconductor integrated circuit device, and a power supply device. A capacitor is provided between the output side of an inductor and a ground potential. A... | 08/05/2008 |
| 7378884 | 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 f... | 05/27/2008 |
| 7372649 | Apparatus and method for applying write signals for driving a write head An apparatus for use in applying write signals for driving a write head to effect writing information to a memory device; the write signals including a first write signal and a second write signal; includes: (a) a directing circuit receiving the write signals, direc... | 05/13/2008 |
| 7368957 | Capacitively coupled floating gate driver High-performance low-power isolated bootstrapped gate drive apparatus and methods are disclosed for driving high-side and floating transistors. The gate drivers use edge-triggered capacitive-coupled inputs. The gate drivers may include detection and delay circuitry ... | 05/06/2008 |
| 7366000 | Half bridge inverter A half bridge inverter includes a push/pull control chip outputting a first control signal and a second control signal. Each duty cycle of the two control signals is smaller than 50%. Moreover, both a first buffer circuit and a second buffer circuit are coupled to t... | 04/29/2008 |
| 7365579 | Gate driving circuit A gate driving circuit has a variable current carrying path that switches a current carrying path among a driving target device, a DC power source and a reactor to operate in plural operation modes including at least a hold mode, a preparation mode, and an execution... | 04/29/2008 |
| 7365584 | Slew-rate control apparatus and methods for a power transistor to reduce voltage transients during inductive flyback Apparatus and methods that reduce the amount of conducted/radiated emissions from a power switch (200) when a transistor (210) is switched OFF are disclosed. In addition, apparatus and methods that reduce the slew rate in a power switch when the power ... | 04/29/2008 |
| 7365928 | Write driver with improved boosting circuit and interconnect impedance matching A write driver driving a write current through a head connected to the write head by an interconnect. The write driver includes a circuit matching output resistance to the odd characteristic impedance of the interconnect and a voltage boosting circuit. The voltage b... | 04/29/2008 |
| 7362148 | Device for controlling a semiconductor element A control device for controlling a load drive semiconductor element for driving a load has a test operation mode for measuring a leak current of the load drive semiconductor element. In the test operation mode, a control terminal of the load drive semiconductor elem... | 04/22/2008 |
| 7362530 | Amplifier apparatus for use with a sensor An amplifier apparatus for use with a sensor includes: (a) a first and a second amplifying circuit segment coupled with the sensor and cooperating to effect substantially balanced handling of signals received from the sensor; the first amplifying circuit segment inc... | 04/22/2008 |
| 7362146 | Large supply range differential line driver A differential transmission line driver with supplemental current sources that overcome switching anomalies and EMU issues when the logic state of the driver is switching. During a logic transition, a current source, that is directed to the output of the driver, may... | 04/22/2008 |
