Patent List 1988-1990, Power Supplies / Power Electronics related
Brought to you by SMPS Power Supplies

 

1990 - USA

Number

Title

Inventor Assignee Comments
4,891,746 Method of optimizing the efficiency of a Bowman et al. AT&T Bell  
4,894,567 Active snubber circuit Lenk    
4,910,482 AC line filter Takagai et al.    
4,912,622 Gate driver for a full-bridge lossless switching device Steigerwald    
4,914,561 Dual transformer device for power converters Rice    
4,922,365 Overvoltage suppressing circuit for semiconductor device Mori Mitsubishi  
4,922,401 Inverter circuit utilizing the reverse voltage capabilities of GTO thyristors Lipman    
4,922,404 Method and apparatus for gating of synchronous rectifier Ludwig    
4,926,104 Adjustable speed AC drive system control for operation in pulse width … King et al.    
4,929,882 Apparatus for converting DC to DC having non-feed back variable hysteretic … Szepsi    
4,930,059 Switched-mode DC-to-DC power converter Rutt    
4,930,061 Method and network for enhancing power factor of off-line switching circuit Slack et al. AT&T Bell  
4,931,716 Constant frequency zero-voltage-switching multi-resonant Jovanovic et al.    
4,931,920 Circuit and method for regulating output voltage of a switch mode power … Barker    
4,933,624 Electric power supply with controllable voltage boost Kumar    
4,937,470 Driver circuit for power transistors Zeiler    
4,937,725 Circuit for eliminating snubber current noise in the sense circuit of an H-bridge … Dhyanchand    
4,939,633 Inverter power supply system Rhodes    
4,940,929 AC to DC converter with unity power factor Williams    
4,942,509 Control arrangement for a switch mode power supply Shires    
4,947,102 Feedback loop gain compensation for a switched resistor of an H-bridge inverter Ekstrand    
4,950,974 Circuit for piloting an inductive load, particularly for controlling the electro-… Pagano    
4,952,819 Circuit for limiting current peaks at turn-on of a switching transistor Herrmann    
4,953,068 Full bridge power converter with multiple zero voltage resonant transition switching Henze Unisys  
4,956,626 Inductor transformer cooling apparatus Hoppe    
4,959,764 DC/DC converter switching at zero voltage Bassett    
4,961,129 Current controlled active flywheel type neutral point clamped converter Shekhawat    
4,965,507 Battery charger for detecting the current rate of charge for rechargeable batteries Smilanich et al.    
4,967,333 Stabilized power supply with reduced ripple factor Callier    
4,975,821 High frequency switched mode resonant commutation power supply Lethellier    
4,977,493 Efficient snubber for rectifier circuits Smith Astec  

 

1989 - USA

Number

Title

Inventor Assignee Comments
4,800,323 Single-ended self-oscillating dc-dc converter for intermitently energized load … Sikora    
4,801,983 Schottky diode formed on MOSFET drain Ueno et al.    
4,802,078 Active snubbing circuit for switching mode power supply Hill Power Pac  
4,805,079 Switched voltage converter Van Buul Philips  
4,806,834 Electrical circuit for inductance conductors, transformers and inductors Koenig    
4,806,842 Soft start for five pin switching regulators Bittner NS  
4,809,148 Full-fluxed, single-ended DC converter Barn    
4,809,151 Switching regulator having parallel diode isolated primary windings and plural … Ota Fanuc  
4,811,187 DC-DC converter with saturable reactor reset circuit Nakajima et al.    
4,811,188 Series inverter with shunted transformer for capacitor charging Bees    
4,814,962 Zero voltage switching half bridge resonant converter Magalhaes et al. AT&T  
4,814,966 Shunt switched resistor regulator with diode snubber Ekstrand    
4,816,982 AC to DC power converter with integrated line current control for improving … Severinsky Viteq  
4,816,985 Apparatus for controlling an alternating current power supply Tanahashi    
4,820,965 Control circuit for battery charger Siemer    
4,821,163 Start-up circuit for an integrated-magnetic power Bloom    
4,823,249 High-frequency resonant power converter Garcia    
4,825,144 Dual channel current mode switching regulator Alberkrack    
4,825,348 Resonant power converter with current sharing among multiple transformers Steigerwald et al. GE  
4,829,232 Nonlinear resonant switch and converter Erickson    
4,835,497 AC line filter Takagai et al.    
4,835,580 Schottky barrier diode and method Havemann et al.    
4,835,668 Power supply with two output voltages Palm    
4,837,452 Off-line dc power supply Peterson    
4,841,220 Dc-to-Dc converters using multi-resonant series converter Tabisz et al.    
4,843,299 Universal battery charging system and a method Hutchings    
4,845,605 High-frequency DC-DC power converter with zero-voltage switching of single … Steigerwald GE  
4,847,744 Voltage converter apparatus Araki    
4,853,837 Synchronous switching power supply with Gulczynski    
4,855,888 Constant frequency resonant power converter with zero voltage switching Henze et al. Unisys  
4,857,822 Zero-voltage-switched multi-resonant converters including the buck and forward … Tabisz et al.    
4,858,052 Method and means for protecting converter circuits McDonnal    
4,859,921 Electronic control circuits, electronically commutated motor systems, switching … Archer    
4,860,184 Half-bridge zero-voltage switched multi-resonant converters Tabisz et al. VTIP  
4,860,189 Full bridge power converter circuit Hitchcock    
4,862,342 DC to AC inverter with neutral having a resonant circuit Dhyanchand    
4,864,478 Integrated-magnetics power converter Bloom    
4,864,482 Conversion circuit for limiting Quazi et al.    
4,864,483 Static power conversion method and apparatus having essentially zero switching … Divan Wisconsin Alumni  
4,866,367 Multi-loop control for quasi-resonant converters Ridley et al.    
4,870,554 Active snubber forward converter Smith Power Systems  
4,871,959 Solar trickle charger for lead acid batteries Gali    
4,875,148 Control for producing a low magnitude voltage at the output of a PWM inverter Roe et al.    
4,876,635 Series resonant inverter with lossless snubber-resetting components Park et al.    
4,882,532 Active overvoltage control for inductive load driving Garibaldi    
4,882,663 MOSFET flyback converter Nilssen    
4,884,180 Regulated direct-current converter Hoffmann Wandel & …  
4,884,183 Dual-mode controlled pulse width modulator Sable    
4,884,186 Power supply with reduced switching losses Small    
4,887,198 Electronic large current switch for a single power circuit Lee    

 

1988 - USA

Number

Title

Inventor Assignee Comments
4,720,667 Zero-current switching quasi-resonant converters operating in a full-wave mode Lee et al.    
4,720,668 Zero-voltage switching quasi-resonant converters Lee et al.    
4,725,739 AC branch power distribution filter McCartney    
4,727,306 Portable battery charger Misak et al.    
4,727,308 FET power converter with reduced switching loss Huljak    
4,730,243 EMI reduction circuit Glennon    
4,734,839 Source volt-ampere/load volt-ampere differential Barthold    
4,739,461 Power supply device for providing positive and negative DC voltages on the … Komatsu    
4,739,462 Power supply with noise immune current Farnsworth    
4,745,537 Low dissipation power converter Cheung    
4,748,605 Bias-magnetic-field generating apparatus in magneto-optical information … Sakai et al.    
4,750,102 Power converting apparatus Yamano et al.    
4,755,922 DC to DC converter for ethernet transceiver Puvogel    
4,759,057 Telephone modular distributing frame De Luca    
4,760,512 Circuit for reducing transistor stress and resetting the Loftus    
4,761,623 Broadband RFI power line filter Schneider    
4,761,725 Digitally controlled A.C. to D.C. power conditioner Henze    
4,761,727 Current sensing circuit for use with decoupled half bridge converter Kammiller Reliance  
4,768,002 Power filter resonant frequency modulation network Cronin    
4,772,810 Apparatus for non-dissipative switching transistor snubber Felps HP  
4,774,649 Integrated magnetic resonant power Archer    
4,775,821 Variable input voltage DC to DC converter with switching transistor drive … Sikora    
4,777,578 Integrated current sensor torque control for ac motor drives Jahns    
4,783,727 DC/DC converter Neumann Eckhardt  
4,785,387 Resonant converters with secondary-side resonance Lee et al.    
4,785,388 Gate pulse generator for thyristor converter Takahashi    
4,796,173 Low input voltage resonant power converter with high-voltage A.C. link Steigerwald GE  

 

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