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| Number | Title | Issue Date |
| 7999602 | Switching control circuit It is possible to reliably prevent two switching elements comprising a half-bridge circuit from turning ON simultaneously even when two pulse signals allowing both the two switching elements to turn ON are input thereto. A first drive signal is allowed to be ... | 08/16/2011 |
| 7969226 | High temperature gate drivers for wide bandgap semiconductor power JFETs and integrated circuits including the same Gate drivers for wide bandgap (e.g., >2 eV) semiconductor junction field effect transistors (JFETs) capable of operating in high ambient temperature environments are described. The wide bandgap (WBG) semiconductor devices include silicon carbide (SiC) and gallium ni... | 06/28/2011 |
| 7965126 | Bridge circuits and their components A half bridge is described with at least one transistor having a channel that is capable in a first mode of operation of blocking a substantial voltage in at least one direction, in a second mode of operation of conducting substantial current in one direction throug... | 06/21/2011 |
| 7388411 | Semiconductor integrated circuit device and semiconductor integrated circuit system A semiconductor integrated circuit device according to the present invention includes: a sample circuit in which through current to be monitored flows during switching between transistors; a non-overlap circuit for outputting an output signal for the switching in th... | 06/17/2008 |
| 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 |
| 7358791 | Discharge protection circuit A discharge protection circuit for discharging a full-bridge circuit in a brushless DC fan, wherein the brushless DC fan comprises a control circuit outputting at least one first control signal and at least one second control signal to the full-bridge circuit. The s... | 04/15/2008 |
| 7342449 | Differential amplifier, and data driver of display device using the same Disclosed is a Rail-to-Rail amplifier including a plurality of differential pairs of a first conductivity type and a plurality of differential amplifiers of a second conductivity type each with one of an input pair thereof constituting an input terminal, a different... | 03/11/2008 |
| 7332942 | Operation of a half-bridge, in particular a field-effect transistor half-bridge The invention relates to a circuit configuration (1) for controlling the operation of a half-bridge (13) by pulse-width modulation, especially in a synchronous rectifier mode. Said circuit configuration comprises a first terminal connection (23, 25 | 02/19/2008 |
| 7277245 | Write driver circuit for magnetic data storage systems A write driver circuit for a magnetic storage medium that communicates with a write head having first and second nodes comprises a first driver circuit with an input and an output that communicates with the first node of the write head. A first charge pump communica... | 10/02/2007 |
| 7276954 | Driver for switching device A driver for a switching device has a plurality of driver circuits for driving the switching device and a control circuit. The control circuit selectively operates the driver circuits in response to a plurality of predetermined drive modes. Alternatively, a driver f... | 10/02/2007 |
| 7265926 | High speed hard disk drive with symmetric writer A disk drive data storage system, comprising a magnetic disk a head for writing data to the disk, and circuitry for providing a first voltage (HWX) to a first node (N1) and a second voltage (HWY) to a second node (N2). The first and second volt... | 09/04/2007 |
| 7248093 | Bipolar bootstrap top switch gate drive for half-bridge semiconductor power topologies The invention is a method and apparatus for supplying both positive and negative gate drive power supply potentials to the top switch, in a typical half-bridge semiconductor power topology, from the bottom switch gate drive power supplies and without the use of tran... | 07/24/2007 |
| 7236018 | Programmable low-voltage differential signaling output driver The present invention relates to a programmable low-voltage differential signaling (LVDS) output driver. The programmable LVDS output driver may include circuitry for tri-stating the output to allow several programmable LVDS output drivers to be coupled to a single ... | 06/26/2007 |
| 7227391 | Semiconductor integrated circuit device and semiconductor integrated circuit system A semiconductor integrated circuit device according to the present invention includes: a sample circuit in which through current to be monitored flows during switching between transistors; a non-overlap circuit for outputting an output signal for the switching in th... | 06/05/2007 |
| 7224135 | Imposed current motor drive A method for driving a motor by imposing the current in the motor by means of power current mirrors is presented. This allows driving the motor in current with higher accuracy and lower electrical noise. The Hard Disk Drive application is an example where higher res... | 05/29/2007 |
| 7221195 | 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... | 05/22/2007 |
| 7187206 | Power savings in serial link transmitters Aspects of saving power in a serial link transmitter are described. The aspects include providing a parallel arrangement of segments, each segment comprising prebuffer and output stage circuitry of the serial link transmitter and each segment enabled independently t... | 03/06/2007 |
| 7180337 | Method for switching driving of a semiconductor switching element A method of driving a semiconductor switching element includes applying a drive signal configured to switch the semiconductor element such that a change in the charge stored on the drive electrode occurs over time, the drive signal having one or more predetermined p... | 02/20/2007 |
| 7176743 | Driver circuit capable of providing rise and fall transitions that step smoothly in the transition regions A driver circuit that has a plurality of output elements that are switched on and off in staggered fashion by signals generated by first and second drive chains of a drive chain configuration. The first drive chain comprises “N” delay elements, each of which pro... | 02/13/2007 |
| 7161818 | High frequency excitation system A power module is adapted to be connected to a voltage source and to supply power to a load. The power module includes a switching bridge that includes a first power transistor and a second power transistor, a first gate controller for driving the first power transi... | 01/09/2007 |
| 7138321 | Boost capacitor layout technique for an H-bridge integrated circuit motor controller to ensure matching characteristics with that of the low-side switching devices of the bridge An H-bridge circuit having a boost capacitor coupled to the gate of the low-side driver. A driver, in the form of a switching transistor is connected between the load and ground, thus providing a low-side driver. A capacitor is coupled to the gate of the low-side dr... | 11/21/2006 |
| 7123490 | Synchronous rectifying switching power source circuit In a synchronous rectification switching power supply circuit, a primary winding of a transformer and a main switching device are serially connected to a direct current input power supply. A secondary winding and a synchronous rectification device on the secondary s... | 10/17/2006 |
| 7115922 | H-bridge drive utilizing a pair of high and low side MOSFET's in a common insulation housing A fully protected H-bridge for a d-c motor consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs. The entire bridge is controlled by the IC. Shoot thru protection is ... | 10/03/2006 |
| 7116153 | Circuit for driving a depletion-type JFET A circuit for driving a depletion-type JFET comprises a capacitor connected between the gate of the depletion-type JFET and a control signal, and a switch that is controlled by the control signal connected between the gate and source of the depletion-type JFET. The ... | 10/03/2006 |
| 7110204 | Process-insensitive write current generation for a HDD preamplifier writer equipped with parallel output resistive damping The present invention achieves technical advantages as an improved Parallel Damping scheme suitable for very-low-supply preamp operation. The improved Parallel Damping Scheme accurately generates a programmable Iw flowing through the write head while compensating fo... | 09/19/2006 |
| 7106536 | Write head demagnetizer A demagnetizer for an inductive load having a driver circuit including at least one transistor and a ramp-down voltage source switchably connected to the driver circuit, so that when the ramp-down voltage source is connected to the transistor, it drives the voltage ... | 09/12/2006 |
| 7102405 | Pulse-width modulation circuit and switching amplifier using the same A pulse-width modulation circuit converts an input signal into a pulse signal to be supplied to a switch amplifying circuit. The modulation circuit includes a comparison signal generator, an amplitude controller for modulating a comparison signal from the signal gen... | 09/05/2006 |
| 7091752 | 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... | 08/15/2006 |
| 7068105 | Low-voltage differential amplifier A low-voltage differential amplifier circuit is disclosed. The low-voltage differential amplifier circuit includes a first differential amplifier, a second differential amplifier and a summing circuit. The first differential amplifier receives a pair of differential... | 06/27/2006 |
| 7042245 | Low power consumption MIS semiconductor device A logic gate is constructed of an insulated gate field effect transistor (MIS transistor) having a thin gate insulation film. An operation power supply line to the logic gate is provided with an MIS transistor having a thick gate insulation film for switching the su... | 05/09/2006 |
| 6980441 | Circuit and method for controlling a synchronous rectifier in a power converter A control circuit and corresponding method, particularly for power converters in a system having paralleled power converters, for rapidly and efficiently controlling a free-wheeling synchronous rectifier, so as to prevent any large negative current flow that might c... | 12/27/2005 |
| 6970316 | Write head driver circuit and method for writing to a memory disk A circuit and method are disclosed for relatively rapidly causing the current flowing through a write head to transition between steady states without generating an appreciable amount of capacitively-coupled noise. Embodiments of the present invention generally prov... | 11/29/2005 |
| 6940238 | Single coil, direct current permanent magnet brushless motor with voltage boost A single coil, direct current permanent magnet brushless motor including a stator including six alternately-wound coils connected into a single coil having first and second ends, the oppositely-wound coils forming stator poles, and six magnets of alternating polarit... | 09/06/2005 |
| 6931560 | Programmable transmit SCSI equalization An apparatus comprising a first plurality of parallel switches and a second plurality of parallel switches. The first plurality of parallel switches may be configured to control a voltage on a first output pin. The second plurality of parallel switches may be config... | 08/16/2005 |
| 6921147 | Printing apparatus A recording apparatus can improve stability of the speed of a carriage without increasing the production cost. The recording apparatus for performing recording by discharging ink from a recording device onto a recording medium includes a carriage adapted to convey a... | 07/26/2005 |
| 6897706 | Method for driving a high side P-CHANNEL MOSFET A P-CHANNEL MOSFET is configured as a high side switch by arranging a capacitor between the P-CHANNEL MOSFET gate and a pair of push/pull transistors in a control circuit. A pull-up resistor is connected with the high side supply, one leg of the capacitor and with t... | 05/24/2005 |
| 6798271 | Clamping circuit and method for DMOS drivers A transconductance circuit (16) and method for protecting an H-bridge power circuit (10) that provides power to a load that includes an inductive component (14) connected between one side of the inductive component (14) and a gate (25 | 09/28/2004 |
| 6753717 | H-bridge driver An H-bridge driver has a drive signal generating circuit for generating a square-wave signal as a drive signal. The H-bridge driver also has a waveform shaping circuit for blunting the waveform of the drive signal at the rising and trailing edges thereof. The wavefo... | 06/22/2004 |
| 6690212 | Inductive load driving circuit An inductive load driving circuit includes a switching transistor and a guardring. The switching transistor is connected between an output terminal and a power supply potential point. The guardring is an N-type semiconductor region provided for the switch... | 02/10/2004 |
| 6614268 | High-speed, low-power inter-chip transmission system In an integrated circuit, a data link relies on low swing differential signals. A push-pull driver circuit and a receiver circuit are both clocked from a common on-chip clock. A driver circuit includes an H-bridge of NMOS transistors and a line-to-line pr... | 09/02/2003 |
