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| Number | Title | Issue Date |
| 7082043 | Drive circuit for a synchronous rectifier, method of providing drive signals thereto and power converter incorporating the same The present invention provides a transition-isolating drive circuit for a synchronous rectifier. In one embodiment, the transition-isolating drive circuit includes drive switches coupled to a transformer winding and configured to provide drive signals for the synchr... | 07/25/2006 |
| 7079403 | Isolated DC-DC converters One DC-DC converter includes primary side circuit between high and low side inputs including first primary winding of first transformer, and auxiliary section; and rectifier circuits, with separate secondary windings of first transformer, and in parallel with one an... | 07/18/2006 |
| 7075329 | Signal isolators using micro-transformers A logic signal isolator comprising a transformer having a primary winding and a secondary winding; a transmitter circuit which drives said primary winding in response to a received logic signal, such that in response to a first type of edge in the logic signal, a si... | 07/11/2006 |
| 7075799 | Self-driven synchronous rectifier circuit A DC-DC power converter has a transformer with a primary side and secondary side. A first power transistor is coupled between a first end of a first winding of the secondary side and a ground terminal. A second power transistor is coupled between a second end of the... | 07/11/2006 |
| 7076206 | System for wireless transmission of electrical power, a garment, a system of garments and method for the transmission of signals and/or electrical energy The invention describes a system for electrical transmission in the field of garments and a corresponding transmitter for this. Electrical circuits in garments are coupled, preferably inductively in a wireless manner with electrical devices and/or electrical circuit... | 07/11/2006 |
| 7075132 | Programmable junction field effect transistor and method for programming the same A programmable junction field effect transistor (JFET) with multiple independent gate inputs. A drain, source and a plurality of gate regions for controlling a conductive channel between the source and drain are fabricated in a semiconductor substrate. A first porti... | 07/11/2006 |
| 7075245 | Driving circuit for multiple cold cathode fluorescent lamps backlight applications The present invention provides a driving circuit for driving a light source. The driving circuit includes a serial-arranged transformers system having multiple primary windings and secondary windings; a first switch conducting current though a first path and a secon... | 07/11/2006 |
| 7075271 | Power controlling apparatus with power converting circuit The invention provides an apparatus for bi-directional power conversion between a DC circuit and an AC circuit, which inexpensively and simply suppresses generation losses of elements and reduces heat generation, wherein a voltage obtained by dividing the U-phase vo... | 07/11/2006 |
| 7071582 | Output rising slope control technique for power converter An output voltage rising slope control technique for a power converter is addressed. The output voltage rising slope control technique according to the present invention basically uses a reference voltage generator to precipitate the rising slopes of multiple output... | 07/04/2006 |
| 7071632 | Discharge lamp starter A discharge lamp starter includes a DC/DC converter. The DC/DC converter includes a forward section for producing a first output voltage that is determined by a power supply voltage and a turn ratio of a transformer, and a flyback section for producing a second outp... | 07/04/2006 |
| 7072191 | Switching power source circuit for independent per cycle control of ON/OFF time ratio A switching power supply circuit, which can respond to a rapid and large change in a load quickly and stably and ensure a power supply output having a predetermined voltage, is provided. In the power supply circuit which supplies an input current to a load while swi... | 07/04/2006 |
| 7072390 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 07/04/2006 |
| 7068037 | Method of diagnosing inverter trouble Disclosed is a method of diagnosing inverter trouble capable of improving convenience of use and safety of the user by notifying the user of the error of switching devices used for outputting AC voltage of the inverter and the earth fault of an output of the inverte... | 06/27/2006 |
| 7067991 | Feedback sampling control circuit for lamp driving system The invention discloses a feedback sampling control circuit for a lamp driving system having a feedback loop, in that the feedback sampling control circuit includes a switch and an effective current sampling controller. The switch is electrically coupled in the feed... | 06/27/2006 |
| 7064494 | Discharge lamp operating apparatus and self-ballasted electrodeless discharge lamp A discharge lamp operating apparatus includes a DC power circuit portion for outputting a DC voltage; an inverter circuit including a switching element provided with a control terminal for converting an output from the DC power circuit portion to an AC voltage; a co... | 06/20/2006 |
| 7064521 | Charging circuit for parallel charging in multiple battery systems A charging circuit for controlling a system charging parameter provided to a host of rechargeable batteries, wherein the host of batteries includes at least a first battery and second battery that may be coupled in parallel. The charging circuit provides for fast ch... | 06/20/2006 |
| 7064969 | Monopolar DC to bipolar to AC converter This invention improves the performance and lowers the cost of DC to AC inverters and the systems where these inverters are used. The performance enhancements are most valuable in renewable and distributed energy applications where high power conversion efficiencies... | 06/20/2006 |
| 7061360 | Transformer/rectifier arrangement A rectifier transformer comprises two secondary windings, preferably with a single turn on each winding. The rectifier diodes form an integral part of each of the secondary windings. Thus, a compact arrangement is realised. In a high voltage application, the rectifi... | 06/13/2006 |
| 7061777 | Input stage circuit of three-level DC/DC converter An input stage circuit of a three-level DC/DC converter is provided. The input stage circuit uses metal-oxide-semiconductor field effect transistors (MOSFETs) to discharge a flying capacitor to maintain the voltage across the flying capacitor at a half of the input ... | 06/13/2006 |
| 7061776 | Half-bridge flyback power converter A half-bridge flyback power converter is provided. The half-bridge flyback power converter comprises a high-side switch and a low-side switch periodically conducting an input voltage to a primary winding of a transformer. When the high-side switch and the low-side s... | 06/13/2006 |
| 7057611 | Integrated power supply for an LCD panel The present invention provides an integrated LCD panel power supply formed on a single printed circuit board. The integrated power supply includes at least one DC/AC control unit, at least one DC/DC buck converter unit and at least one DC/DC boost control unit. Each... | 06/06/2006 |
| 7057870 | Inductive load driver circuit and system A circuit and system is disclosed for driving one or more inductive loads, or one or more electrical loads including one or more inductive components. A control computer is configured to selectively supply a boost voltage to the one or more inductive loads, and to c... | 06/06/2006 |
| 7057390 | Linear beam raster magnet driver based on H-bridge technique An improved raster magnet driver for a linear particle beam is based on an H-bridge technique. Four branches of power HEXFETs form a two-by-two switch. Switching the HEXFETs in a predetermined order and at the right frequency produces a triangular current waveform. ... | 06/06/2006 |
| 7057905 | Method and apparatus for power conversion having a four-quadrant output A power converter (10) operating in all four voltage-current quadrants includes an input voltage source (14), an output current independent of an output voltage and a switching arrangement (12, 16, 18, and 20) enabling an output terminal ... | 06/06/2006 |
| 7057910 | Semiconductor device and control method In a semiconductor device for generating complementary PWM signals for, for example, controlling an inverter, a dead time is flexibly added by using a simple architecture. A dead time addition unit adds time elapsing until a value of a timer reaches a set value of a... | 06/06/2006 |
| 7054175 | DC-DC converter A circuit configuration in which a pair of conversion circuit parts for converting a power source voltage of a DC power source into an AC by two pairs of switching elements made of a full bridge configuration and a pair of transformers is used as inverter units. The... | 05/30/2006 |
| 7054176 | Architecture for achieving resonant circuit synchronization of multiple zero voltage switched push-pull DC-AC converters A multi-stage, push-pull driven, resonant DC-AC converter ties the center-taps of primary windings of respective push-pull stages together, and drives each center-tap with a current source. Tying the center-taps of the primary windings of the respective DC-AC conver... | 05/30/2006 |
| 7054296 | Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, ... | 05/30/2006 |
| 7053503 | Cross current compensation control system for a power system Across current compensation control system includes a cross current detection compensator having an input terminal to which a cross connection line that cross-connects the secondary sides of auxiliary current transformers (CTs) are connected, and an output terminal ... | 05/30/2006 |
| 7054167 | Switching power supply circuit A switching power supply circuit achieves improvement of the power conversion efficiency while a high power factor is maintained, in which the power factor of a current resonance converter is improved by feeding back a switching output to a rectification current pat... | 05/30/2006 |
| 7050310 | Synchronous rectification circuit with dead time regulation A synchronous rectification circuit with dead time regulation being adapted for a forward power supply to regulate a dead time of a switch circuit is described. The synchronous rectification circuit has a first switch control circuit connected with a first switch to... | 05/23/2006 |
| 7050920 | Semiconductor device having a test circuit for testing an output circuit A method for testing an output circuit of a semiconductor device including a plurality of output circuits includes the step of turning ON p-ch and n-ch MIS transistors of a subject output circuit, turning ON and OFF one and the other, respectively, of p-ch and n-ch ... | 05/23/2006 |
| 7050309 | Power converter with output inductance In a power converter, the duty cycle of a primary winding circuit causes near continuous flow of power through the primary and secondary winding circuits during normal operation. By providing no regulation during normal operation, a very efficient circuit is obtaine... | 05/23/2006 |
| 7049710 | Power bus for distributed ride through capability A monitoring system includes a power source, a power bus coupled to said power source, a plurality of power taps coupled to said power bus, each of said power taps having a ride-through capacitor operatively coupled thereto to provide power during brief interruption... | 05/23/2006 |
| 7046523 | Core structure and interleaved DC—DC converter topology There is disclosed a core structure with a very low profile, high power density and lower losses. The disclosed design allows for a larger core area where the DC fluxes are added, thereby reducing the air-gap requirements in the cores derived from low saturation den... | 05/16/2006 |
| 7046528 | Load-dependent variable frequency voltage regulator A pulse width modulation voltage regulator comprises a pulse width modulation circuit and a control circuit. The control circuit is operable to reduce a pulse modulation frequency of the pulse width modulation circuit when a load current increases and to increase th... | 05/16/2006 |
| 7046532 | Switching power supply A switching power supply wherein output voltage error detecting means detects the output voltage of DC-DC converters and generates an error signal, input voltage deviation detecting means detects voltages corresponding to the input voltages of the DC-DC converters t... | 05/16/2006 |
| 7042740 | Soft-switching half-bridge inverter power supply system An inverter power supply system includes a half-bridge inverter circuit which includes a first switching element, a second switching element, a first auxiliary capacitor and a second auxiliary capacitor for converting a DC voltage from a DC power supply circuit to a... | 05/09/2006 |
| 7038260 | Dual gate structure for a FET and method for fabricating same A method for fabricating a dual gate structure for JFETs and MESFETs and the associated devices. Trenches are etched in a semiconductor substrate for fabrication of a gate structure for a JFET or MESFET. A sidewall spacer may be formed on the walls of the trenches t... | 05/02/2006 |
| 7039372 | Method and system for frequency up-conversion with modulation embodiments A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In ... | 05/02/2006 |
