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| Number | Title | Issue Date |
| 8169209 | Output driving circuit capable of reducing EMI effect An output driving circuit capable of reducing EMI effect includes a non-overlapping signal generation unit for generating a first non-overlapping signal and a second non-overlapping signal according to an input signal, a pre-driver for generating a first pre-driving... | 05/01/2012 |
| 8080988 | Switch driver with low impedance initial drive and higher impedance final drive A driver circuit (for example, in a switching power supply or in a Class-D switching amplifier) drives a gate of a switch during a transition with a low output impedance during an initial period and then for the remainder of the transition drives the gate with a mid... | 12/20/2011 |
| 7952340 | Integrated power converter and gate driver circuit A gate driver circuit arranged to supply a DC/DC converter with a switching voltage. Both the gate driver circuit and the DC/DC converter include at least one transistor and at least one further component. The DC/DC converter is arranged to convert an input voltage ... | 05/31/2011 |
| 7391198 | Method and cell for controlling the power factor of a power supply line A method for controlling the power factor of a power supply line is described, the method using a power factor control cell connected to the power supply line. Advantageously according to the invention, the power factor control is performed by adjusting the turn-on ... | 06/24/2008 |
| 7385375 | Control circuit for a depletion mode switch and method of operating the same A control circuit for a power converter employing a depletion mode switch and a method of operating the same. In one embodiment, the control circuit includes a controller configured to control the depletion mode switch by providing a drive signal to a control termin... | 06/10/2008 |
| 7382116 | Semiconductor device configured to control a gate voltage between a threshold voltage and ground A pair of upper and lower semiconductor switching elements can switch between the conductive state and the non-conductive state when control voltages vary. A controller controls the levels of the control voltages to alternately turn on the upper and lower semiconduc... | 06/03/2008 |
| 7312596 | Device and method for equalising the charge of serially connected capacitors belonging to a double layer capacitor A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy ... | 12/25/2007 |
| 7265516 | Linear electric motor controller and system for providing linear control The invention relates to a method of, and system for, linear speed control for an electric motor, in which a digital to analog converter means is used for converting an 8-bit digital signal to an analog voltage for setting voltage across a motor, a digital state mac... | 09/04/2007 |
| 7233469 | Components having actively controlled circuit elements Protection and filtering functions are provided for external circuits by internal circuits that use controlled elements. ... | 06/19/2007 |
| 7207054 | Low noise block supply and control voltage regulator A low power circuit for providing power and control signals to a low noise block converter of a satellite receiver over a single coaxial cable includes a tracking switch-mode power supply. The power and control signals have a DC voltage level selected from a plurali... | 04/17/2007 |
| 7187159 | DC—DC converter A DC—DC converter is disclosed that includes a constant voltage circuit outputting a first voltage, a charge pump circuit outputting a second voltage, a current detection circuit converting the output current of the constant voltage circuit into a third voltage an... | 03/06/2007 |
| 7098630 | Control means and methods for a transistor switch circuit The invention relates to a control means and method for a transistor switch circuit controlling a power supply circuit for providing electric power to a load, comprising: a power supply stage having an LC circuit with an inductor, and a control stage having an estim... | 08/29/2006 |
| 7091790 | Power amplifier (PA) efficiency with low current DC to DC converter A novel method and apparatus is disclosed for reducing power dissipation of RF power amplifiers when a reduced output power level is required. The mechanism has the specific purpose of optimizing the collector terminal voltage on portions of the amplifier's RF chain... | 08/15/2006 |
| 7071668 | Power circuit and method for controlling same A power circuit is provided which has a small current peak value from a power source even when a load current repeats periodically, and a burst flow in a burst period and a non-burst flow in a non-burst period alternates. The power circuit includes a power source se... | 07/04/2006 |
| 6970023 | Modulated transistor gate driver with planar pulse transformer Disclosed are methods and apparatus for isolating and driving a power supply or power amplifier circuit. The circuits and methods provide for using a modulated PWM input signal and its complement to drive one or more core-less transformers providing an isolated powe... | 11/29/2005 |
| 6917188 | Power converter circuitry and method A switching power supply controller coupled to a first switching power supply circuit and a second switching power supply circuit, the controller sensing voltages provided to the first switching power supply circuit and the second switching power supply circuit. Bas... | 07/12/2005 |
| 6914421 | DC regulated power supply A DC regulated power supply includes: a power transistor provided for each output of a plurality of systems; a control IC, which compares a feedback value of an output voltage and a reference voltage from a reference voltage source, and controls a base current of th... | 07/05/2005 |
| 6906502 | Method for regulating an output voltage of a power coverter A power converter output voltage regulation method in which sensed output voltages and sensed currents are stored in a memory during a plurality of time intervals. In each time interval the sensed output voltage and the sensed current is compared with the sensed out... | 06/14/2005 |
| 6639388 | Free wheeling buck regulator with floating body zone switch A voltage transformer includes a pair of input terminals for applying an input voltage, a series circuit connected in parallel to the pair of input terminals of a first switch, and a low pass filter. The low pass filter has output terminals for connecting... | 10/28/2003 |
| 6597138 | Method and apparatus for controlling power supplied to a motor A method and apparatus for controlling power supplied to a motor comprising a power controller having a source of electrical power for providing the necessary power to operate the apparatus, an oscillator for generating gating signals at a relatively high... | 07/22/2003 |
| 6580625 | Power supply circuit for driving power transistor There are included a switching circuit for flowing pulse electrical current through a primary winding of a transformer, a half wave rectification circuit or a full wave rectification circuit for extracting electrical current from a secondary winding of th... | 06/17/2003 |
| 6545452 | Method and device for controlling a power converter valve that can be turned off and has at least two series circuits Method and apparatus for controlling a turn-off power converter valve having at least two series connections. Each non-latching power semiconductor switch of this power converter valve has an active collector-emitter limiting circuit. When a rising edge o... | 04/08/2003 |
| 6369551 | Method and apparatus for the supply of energy to a hearing device The present invention relates to a method to generate at least a supply voltage to supply energy to a hearing device, whereas the ratio between the supply voltage and the source voltage is adjustable. The hearing device substantially comprises a source (Q... | 04/09/2002 |
| 6351107 | Driving device of switching element in power conversion device using current control semiconductor switching element In a power conversion device including a current control semiconductor switching element, a driving device of the aforementioned switching element is disclosed. The driving device comprises an output main line connected to a base or gate of the switching ... | 02/26/2002 |
| 6348784 | Switching power supply In a switching voltage power supply, a series regulator circuit interconnects an input voltage section with an output voltage section of the switching power supply. The regulator circuit has an n-channel MOSFET transistor serving as a regulator element. A... | 02/19/2002 |
| 6320362 | Passive auxiliary circuit for series connection of a power switch The present invention relates to a passive auxiliary circuit for driving power switches connected in series for much higher rating of a power system. The passive auxiliary circuit for an IGBT power switch connected in series with another, comprises two ca... | 11/20/2001 |
| 6262564 | Driver for a controllable switch in a power converter A driver for a controllable switch, a method of driving the controllable switch and a power converter employing the driver or the method. The driver receives a control signal and operates the controllable switch. In one embodiment, the driver includes a s... | 07/17/2001 |
| 6225792 | Method and apparatus for the supply of energy to a hearing device The present invention relates to a method to generate at least a supply voltage to supply energy to a hearing device, whereas the ratio between the supply voltage and the source voltage is adjustable. The hearing device substantially comprises a source (Q... | 05/01/2001 |
| 6222355 | Power supply control device for protecting a load and method of controlling the same When the power supply from a power source 101 to a load 102 is controlled in a switching manner by a semiconductor switch QA, reference voltage generating means (QB, Rr) generates a reference voltage (VDSB) having a voltage characteristic substantially eq... | 04/24/2001 |
| 6188207 | Switching power supply The choke coil is in series at one of a pair of source supply lines, and the switching element is connected between the pair of source supply lines and intermittently cuts off the DC input voltage. The rectifier/smoothing circuit is input with a voltage a... | 02/13/2001 |
| 6049199 | Control apparatus with reduced quiescent current A controller is described with a final stage which provides a defined supply voltage for a downstream electronic circuit and a circuit stage upstream from the final stage for reducing the quiescent current supplied by a voltage source. A significant reduc... | 04/11/2000 |
| 5963066 | Semiconductor device which drives low-voltage driven switching device, using low-voltage direct current power source, a diode and a capacitor A capacitor (C) and a Zener diode (ZD2) are connected in parallel to a high-voltage side drive circuit (2). when a Zener voltage (VZD2) is set 5V, a voltage which is charged up in the capacitor (C) is determined by the Zener voltage (VZD2). Hence, it is o... | 10/05/1999 |
| 5936387 | Gate drive circuit for power converters that reduces surge voltages A current detector includes a chopper circuit composed of a switching circuit, i.e. an inverse-parallel circuit composed of an insulated gate bipolar transistor IGBT and a diode, and a switching circuit, i.e. an inverse-parallel circuit composed of an IGB... | 08/10/1999 |
| 5929618 | System and method for synchronizing and interleaving power modules For use in a distributed power system having first and second power processing modules, a power processing module for, and method of synchronizing an operation of the second power processing module with the first power processing module and a power conver... | 07/27/1999 |
| 5838147 | IC wherein a chopper-type buck regulator PNP switch supplies base current to the load A chopper-type regulator circuit includes an output transistor composed of a PNP-type transistor, and a control section for controlling switching of the output transistor based upon a voltage difference between a reference voltage and an output voltage. T... | 11/17/1998 |
| 5818209 | Bootstrap line power supply regulator with no filter capacitor A power supply regulator comprising a regulated-voltage source; a buffer connected to the voltage source; and a diode connected to the output of the buffer. A bootstrap capacitor is located between the diode and the output of a power stage; and the output... | 10/06/1998 |
| 5786687 | Transformer-isolated pulse drive circuit In a computer having switch-mode power converter, a pulse transformer circuit drives the converter's transistor switch in response to pulses from a switch control pulse source. A primary capacitor is connected in series with the switch control pulse sourc... | 07/28/1998 |
| 5689178 | Self-oscillation type DC-DC converter having a driving transistor connected in parallel to a circuit element for starting a switching element The present invention provides a self-oscillation type DC-DC converter that can perform self-oscillating operation without disposing a feedback winding in a choke coil and realizes the high efficiency, small size and low cost by using a MOSFET as a switch... | 11/18/1997 |
| 5670866 | Chopper-type regulator circuit and chopper-type regulator IC A chopper-type regulator circuit includes an output transistor composed of a PNP-type transistor, and a control section for controlling switching of the output transistor based upon a voltage difference between a reference voltage and an output voltage. T... | 09/23/1997 |
| 5654628 | Circuit configuration for generating a controlled output voltage A circuit configuration for generating a controlled output voltage from an uncontrolled input voltage, includes an input terminal for supplying the uncontrolled input voltage, and an output terminal for pickup of the controlled output voltage. A transisto... | 08/05/1997 |
