Power Supplies Patents 1985-1987 Brought to you by SMPS Power Supplies


1987 - USA power supply related patents

Number

Title

Inventor Assignee Comments
4,635,177 Control for a neutral point clamped PWM inverter Shekhawat et al. Sundstrand Corp.  
4,635,179 Transformer rectifier Carsten Eldec  
4,639,849 Snubber circuit for H.F. bridge converter Noworolski et al.    
4,641,229 Switching DC-to-DC converters Easter RCA  
4,642,743 Power supplies with magnetic amplifier voltage regulation Radcliffe    
4,642,745 Power circuit with high input power factor and a regulated output Steigerwald et al. GE  
4,647,834 Battery charger Castleman    
4,648,020 Power booster switching at zero current Vinciarelli    
4,651,267 Proportional base drive circuit for transistorized bridge inverter Nguyen    
4,651,269 Current flow reversing circuit Matsumura    
4,652,809 Switched regulator circuit having an extended duty-cycle range Barn    
4,654,774 Low ripple, high power factor a-c to d-c power supply Lemmers    
4,661,897 Phase modulated, resonant power converting high frequency link inverter … Pitel Allied Corp.  
4,665,357 Flat matrix transformer Herbert    
4,665,458 Acceleration power supply Matsuoka    
4,669,023 Apparatus for freeing electronic one-way switches from high power dissipation … Ohms ANT GmbH  
4,670,827 Controlled regenerative D-C power supply Schneider    
4,670,828 Bi-directional switch for neutral point clamped PWM inverter Shekhawat    
4,672,303 Inductor current control circuit Newton    
4,672,337 VLF/HF EMI filter Thibeault    
4,675,796 High switching frequency converter auxiliary magnetic winding and snubber circuit Gautherin et al. Veeco Ins.  
4,675,797 Current-fed, forward converter switching at zero current Vinciarelli    
4,677,366 Unity power factor power supply Wilkinson    
4,677,534 Stabilizing power source apparatus Okochi    
4,679,129 Series resonant converter Sakakibara et al. NTT  
4,680,687 Switch-mode power supply having a free-running forward converter Stasch et al. Siemens  
4,682,081 Single-ended, self-oscillating DC-DC converter for intermittently energized … Sikora    
4,683,529 Switching power supply with automatic power factor correction Bucher    
4,685,039 DC/DC converter Inoun et al.    
4,686,617 Current limited constant frequency dc converter Colton    
4,688,158 Flyback power supply Peterson et al.    
4,688,162 Rectifier control apparatus with improved power factor Mutoh et al. Hitachi  
4,689,592 Combined transformer and inductor Walker    
4,691,270 Current fed inverter bridge with lossless snubbers Pruitt    
4,691,275 Current fed inverter Moscovici Superior …  
4,692,851 Harmonic-resonant power supply Attwood    
4,695,413 Protective circuit for a hacker type DC converter Ekelund et al.    
4,695,784 Voltage and current limiting phase-triggered battery charger with continuous … Reynolds    
4,697,136 Inverter system for inputting alternating current and direct current combination Ishikawa    
4,700,285 Combined PWM-FM control method and circuit for the high efficiency … Szepesi    
4,703,195 Parallel grounding scheme Bailey    
4,703,409 Coupled power supply inductors for reduced ripple Spreen    
4,706,181 Switching converter with enhanced voltage clamping and energy recovery Mercer Unisys  
4,707,775 Free running current supply for a monitor Panse    
4,709,251 Double Schottky-gate field effect transistor Suzuki    
4,709,316 Single-ended DC-to-DC converter with lossless switching Ngo et al.    
4,709,323 Buck-boost parallel resonant converter with inductive energy recovery circuit Lien    
4,710,686 Method and apparatus for control of current in a motor winding Guzik    
4,716,514 Synchronous power rectifier Patel Unitrode  

1986 - USA power supply related patents

Number

Title

Inventor Assignee Comments
4,563,733 Startup circuit for a switched power supply Schlenk Siemens  
4,564,820 Blocking oscillator converter with controlling logic system Peruth    
4,566,059 Converter with lossless snubbing components Gallios et al. Venus …  
4,567,404 Ballast circuit having electromagnetic interference (EMI) reducing means for … Flugan    
4,568,869 Method of and device for reducing charging time of batteries and increasing … Graham, Jr.    
4,580,112 Active line filter for power line conducted interference Winslow et al.    
4,583,156 Switching mode power supply using saturable reactors Forge Boschert  
4,584,514 High frequency switching battery charger Kaminski    
4,584,517 Self-oscillating DC-DC switching voltage regulator Schwab    
4,585,986 DC switching regulated power supply for driving an inductive load Dyer    
4,588,978 Remote switch-sensing system Allen    
4,591,966 Rectifying network Smith    
4,593,204 Driver circuits for gate turn-off thyristors and bipolar transistors McMurray GE  
4,593,346 Power supply circuit having two mutually independent outputs Nooijen    
4,594,634 High-voltage direct-current supply with over-current protection Schminke    
4,597,036 Blocking oscillator power pack Paulik    
4,599,685 Control circuit for power converter apparatus Hombu    
4,605,999 Self-oscillating high frequency power converter Bowman    
4,606,049 Remote transmitter control system Daniel    
4,606,076 Communication receiver system having a voltage converter with an operating … Davis    
4,607,319 Flyback DC/DC converter with low ripple in the output capacitor Assow et al. Ericsson  
4,607,322 Energy recovery snubber Henderson Sundstrand  
4,609,860 Battery charger having automatic deep discharge mode Fasen    
4,611,185 Electrical noise filter Dirmeyer et al.    
4,613,826 Frequency synthesizer for CATV tuner Masuko et al.    
4,613,841 Integrated transformer and inductor Roberts    
4,617,675 Digital PWMed pulse generator Ashikaga et al.    
4,618,919 Topology for miniature power supply with low voltage and low ripple requirements Martin Sperry  
4,622,526 Power line interference filter mounted on a PC board Schneider et al.    
4,625,271 Soft-start circuit for a power converter Chetty    
4,626,980 Power bridge having a non-dissipative snubber circuit McGuire    
4,628,426 Dual output DC-DC converter with independently controllable output voltages Steigerwald GE  
4,630,005 Electronic inverter, particularly for use as ballast Clegg et al. Brigham Univ.  

1985 - USA power supply related patents

Number

Title

Inventor Assignee Comments
4,519,022 Ripple reduction circuit for an inverter Glennon    
4,519,024 Two-terminal transistor rectifier circuit arrangement Federico et al.    
4,520,437 Power conversion circuit for synthesizing a sinewave with programmed … Boettcher, Jr    
4,523,267 Power converter control circuit Mehl    
4,523,269 Series resonance charge transfer regulation method and apparatus Baker et al.    
4,529,927 Apparatus for the control of a switched power regulator O'Sullivan    
4,530,043 DC switching voltage converter for multiplying an input dc voltage without … Palm et al.    
4,535,399 Regulated switched power circuit with resonant load Szepesi    
4,536,700 Boost feedforward pulse width modulation regulator Bello et al. UTC  
4,541,041 Full load to no-load control for a voltage fed resonant inverter Park    
4,542,451 Inverter with bidirectional inverter for regenerative current Hucker    
4,545,004 Bridge driver circuit for a DC electric motor Kade et al.    
4,546,421 Flyback feedforward pulse width modulator regulator Bello et al.    
4,553,199 High frequency power supply device Harada    
4,555,655 Charging/discharging circuit Tanaka    
4,559,590 Regulated DC to DC converter Davidson    
4,559,593 Method and apparatus for reducing the number of switching transitions in a … Glennon1    
4,561,046 Single transistor forward converter with lossless magnetic core reset and … Kuster GTE  


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