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Class Information
Number: 363/21.1
Name: Electric power conversion systems > Current conversion > Including d.c.-a.c.-d.c. converter > Having transistorized inverter > Single-ended, separately-driven type > With automatic control of the magnitude of output voltage or current > For forward-type converter > Utilizing pulse-width modulation
Description: Subject matter wherein the switch control means includes means to vary the conduction/non-conduction duty cycle of the transistor switch means to control the rectifier output current or voltage.

Sub-classes under this class:

Class Number Class Name Patents
363/21.11 Having particular pulse-width modulation circuit 141

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
4980811 Power source apparatus Dec. 25, 1990
4935858 Auxiliary output regulation technique for power supplies Jun. 19, 1990
4928220 Switching mode DC-to-DC power supply with improved current sensing May. 22, 1990
4926305 Having a plurality of secondary windings May. 15, 1990
4922396 DC-DC converter May. 1, 1990
4912617 Switch mode power supply with separately regulated secondary voltage Mar. 27, 1990
4887199 Start circuit for generation of pulse width modulated switching pulses for switch mode power supplies Dec. 12, 1989
4885674 Synthesis of load-independent switch-mode power converters Dec. 5, 1989
4884180 Regulated direct-current converter Nov. 28, 1989
4870555 High-efficiency DC-to-DC power supply with synchronous rectification Sep. 26, 1989
4862339 DC power supply with improved output stabilizing feedback Aug. 29, 1989
4858052 Method and means for protecting converter circuits Aug. 15, 1989
4837670 Bias source for a switchmode converter Jun. 6, 1989
4791544 Regulating control for single-ended switching power supply Dec. 13, 1988
4791528 Power supply device Dec. 13, 1988
4777575 Switching power supply Oct. 11, 1988
4774584 High-voltage power supply for a picture tube Sep. 27, 1988
4772995 Switching supply with pulse width and rate modulation Sep. 20, 1988
4763238 Extended overload protection circuit for a switch mode power supply having cycle detector, memory and flip-flop inhibition Aug. 9, 1988
4761702 CMOS latch-up recovery circuit Aug. 2, 1988
4740877 Power supply drive circuit improvement Apr. 26, 1988
4740879 Blocking oscillator switched power supply with standby circuitry Apr. 26, 1988
4740880 Blocking oscillator-switched power supply with peak current reduction circuitry Apr. 26, 1988
4731720 High-voltage power source apparatus Mar. 15, 1988
4725936 High-voltage stabilizing power supply apparatus with an improved inductive noise compensation Feb. 16, 1988
4709315 Isolated controller circuit Nov. 24, 1987
4706176 Clocked direct voltage converter Nov. 10, 1987
4695935 Power supply Sep. 22, 1987
4695936 Switching mode power supply start circuit Sep. 22, 1987
4691159 Partial shunt switching limiter for a spacecraft solar-panel or like power-source array Sep. 1, 1987
4680688 DC/DC converter Jul. 14, 1987
4669039 Circuit arrangement for autoconverters May. 26, 1987
4658341 Regulated DC power supply Apr. 14, 1987
4648016 Blocking oscillator switched mode power supply Mar. 3, 1987
4646219 Intrinsically safe power supply with a current regulator Feb. 24, 1987
4642745 Power circuit with high input power factor and a regulated output Feb. 10, 1987
4631654 Two-state switched-mode power supply Dec. 23, 1986
4628426 Dual output DC-DC converter with independently controllable output voltages Dec. 9, 1986
4623960 Bias power source energized by tertiary winding including hysteresis characteristic for disabling the power switch when a minimum base drive signal can no longer be maintained Nov. 18, 1986
4595974 Base drive circuit for a switching power transistor Jun. 17, 1986
4593347 Blocking oscillator switched mode power supply Jun. 3, 1986
4578758 Electronic postage meter having a regulated power supply system responsive to a voltage developed in a transformer primary winding circuit Mar. 25, 1986
4562523 Power supply Dec. 31, 1985
4561046 Single transistor forward converter with lossless magnetic core reset and snubber network Dec. 24, 1985
4559591 D.C. voltage converter including a pulse width controlled semiconductor switch Dec. 17, 1985
4486823 Circuit for converting an input d.c. voltage into an output d.c. voltage Dec. 4, 1984
4438411 Temperature compensating method and apparatus for thermally stabilizing amplifier devices Mar. 20, 1984
4425611 Switching voltage regulators with output voltages indirectly regulated respective to directly regulated boosted input voltages Jan. 10, 1984
4420804 Switching regulator with base charge removal circuit Dec. 13, 1983
4389702 Switching power supply circuit having constant output for a wide range of input voltage Jun. 21, 1983

1 2 3 4 5 6

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