George Gabor, 812751 Esaw St, Minden, NV 89423

6384492, May 7, 2002

May 5, 1999

09/305555

Arthur H. Iversen - Saratoga CA
George Gabor - Lafayette CA

Spinel LLC - Lafayette CA

H01L 2500

307147, 307131, 307150, 257691, 257713, 257724, 327564, 327565

Power output switching circuit for use in high current and high frequency applications. The output circuit provides a series of geometrically symmetric, parallel spaced semiconductor converters arranged such that the voltage for each semiconductor output device is substantially equal and minimal for each device. In this way, each device exhibits substantially the same impedance, such that circuit performance is largely a function of intrinsic device characteristics, and substantially independent of cross coupling and other external influences.

5638265, Jun 10, 1997

Oct 21, 1994

8/325231

George Gabor - Lafayette CA

H02M 542

363 89

The PWM control scheme is illustrated in conjunction with a power distribution control circuit (30), wherein the duty cycle of converter (32) is suitably controlled by a number of feedback loops embodying various parameters, for example a voltage error signal, an average (e. g. RMS) value of the input voltage (Vin). Circuit (30) comprises a rectifying circuit (42), a converter circuit (32), for example an AC-DC converter, a capacitor (C), an oscillator and PWM circuit (44), an error signal (46), a multiplier circuit (48), a differencing amplifier (50), and a synthesizing circuit (52). Circuit (30) appears as a resistive load to the line for feed PWM, a fixed load, and a fixed RMS input voltage. To stabilize the output voltage (Vout), the pulse width signal (44a) applied to converter suitably varies in proportion to both changes in the RMS value of the input voltage and the output voltage. The output voltage error signal applied to multiplier circuit by error circuit provides the correction value for Vout variations.

6191676, Feb 20, 2001

Oct 18, 1999

9/420069

George Gabor - Lafayette CA

Spinel LLC - Saratoga CA

H01F 2108
H02M 542

336160

Methods and apparatus are disclosed for suppressing or eliminating nonlinear current drawing characteristics, while at the same time substantially eliminating high order current harmonics. In accordance with various aspects of the present invention, an energy transfer system, for example a pulse width modulator (PWM) flyback converter (22), comprises an inductor (L) interposed between the AC line voltage and the load (R. sub. load), with a controllable switch (26) provided between the inductor (L) and the negative supply leg of a rectifier circuit (10). The duty cycle of the converter switch (26) is suitably controlled to produce a substantially constant DC output from the converter (22). Proper synchronization of the converter switch (26) ensures that the current through the inductor (L) and the output current through the load (R. sub. load) remains in phase with the AC supply voltage.

5537074, Jul 16, 1996

May 10, 1994

8/211880

Arthur H. Iversen - Saratoga CA
George Gabor - Lafayette CA

H01L 2500
H01L 2334

327564

Power output switching circuit (215) for use in high current and high frequency applications. The output circuit provides a series of geometrically symmetric parallel spaced semiconductor converters (214A, 214B, 216A, 216B) arranged such that the voltage for each semiconductor output device is substantially equal and minimal for each device. In this way, each device exhibits substantially the same impedance, such that circuit performance is largely a function of intrinsic device characteristics, and substantially independent of cross coupling and another external influences.

RE35807, May 26, 1998

Nov 5, 1996

8/743656

Arthur H. Iversen - Saratoga CA
George Gabor - Lafayette CA

H01L 2500
H01L 2334

327564

Power output switching circuit (215) for use in high current and high frequency applications. The output circuit provides a series of geometrically symmetric parallel spaced semiconductor converters (214A, 214B, 216A, 216B) arranged such that the voltage for each semiconductor output device is substantially equal and minimal for each device. In this way, each device exhibits substantially the same impedance, such that circuit performance is largely a function of intrinsic device characteristics, and substantially independent of cross coupling and another external influences.

5914564, Jun 22, 1999

Apr 7, 1994

8/224036

George Gabor - Lafayette CA
Thomas Robert Orr - Castro Valley CA
Charles Maurice Greene - Oakland CA
Douglas Gordon Crawford - Orinda CA
Samuel Maurice Berman - San Francisco CA

The Regents of the University of California - Oakland CA

H01J 6504

315 39

A high intensity discharge lamp without mercury is disclosed radiating a selected spectrum of which can be almost entirely in the visible range from an envelope that contains a sulfur containing substance. The lamp utilizes a signal source that generates an excitation signal that is externally coupled to the exterior surface of the envelope to excite the enclosed sulfur containing substance. Various embodiments of the lamp use electrodes adjacent the envelope to couple the excitation signal thereto with the face of the electrodes shaped to complement the shape of the exterior surface of the envelope. Two shapes discussed are spherical and cylindrical. To minimize filamentary discharges each envelope may include an elongated stem affixed to the exterior thereof whereby a rotational subsystem spins the envelope. In yet another embodiment the envelope has a Dewar configuration with two electrodes, one positioned near the external curved side surface of the body, and a second to the inner surface of the hole through the envelope. Further, the envelope may contain a backfill of a selected inert gas to assist in the excitation of lamp with that backfill at a pressure of less than 1 atmosphere, wherein the backfill pressure is directly related to the increase or decrease of peak output and inversely related to the increase and decrease of the emitted spectrum from the envelope.

6160326, Dec 12, 2000

Dec 14, 1999

9/460784

Arthur H. Iversen - Saratoga CA
George Gabor - Lafayette CA

H01L 2500

307147

Power output switching circuit for use in high current and high frequency applications. The output circuit provides a series of geometrically symmetric, parallel spaced semiconductor converters arranged such that the voltage for each semiconductor output device is substantially the same impedance, such that circuit performance is largely a function of intrinsic device characteristics, and substantially independent of cross coupling and other external influences.

5969962, Oct 19, 1999

Jun 9, 1997

8/871052

George Gabor - Lafayette CA

H02M 542

363 89

Methods and apparatus are disclosed for suppressing or eliminating nonlinear current drawing characteristics, while at the same time substantially eliminating high order current harmonics. In accordance with various aspects of the present invention, an energy transfer system, for example a pulse width modulator (PWM) flyback converter (22), comprises an inductor (L) interposed between the AC line voltage and the load (R. sub. load), with a controllable switch (26) provided between the inductor (L) and the negative supply leg of a rectifier circuit (10). The duty cycle of the converter switch (26) is suitably controlled to produce a substantially constant DC output from the converter (22). Proper synchronization of the converter switch (26) ensures that the current through the inductor (L) and the output current through the load (R. sub. load) remains in phase with the AC supply voltage.