1
Peter A Hochstein: Power supply for light emitting diode array. Howard & Howard, August 26, 1997: US05661645 (311 worldwide citation)

An apparatus (10) for supplying regulated voltage d.c. electrical power to an LED array (12) includes a rectifier (32) responsive to a.c. power for generating rectified d.c. power and a power factor correcting and voltage regulating buck/boost switchmode converter (38) responsive to the rectified d. ...


2
John C Gord, Lyle Dean Canfield: Low power rectifier circuit for implantable medical device. Alfred E Mann Foundation, Abraham N Seidman, Bryant R Gold, December 7, 1999: US05999849 (301 worldwide citation)

A low power switched rectifier circuit is realized using P-MOS and N-MOS FET switches that are turned ON/OFF at just the right time by a detector and inverter circuit (which form an integral part of the rectifier circuit) to rectify an incoming ac signal in a highly efficient manner. Parasitic diode ...


3
Okamura Masaki, Sato Eiji: Voltage converter control apparatus, voltage conversion method, storage medium, program, drive system, and vehicle having the drive system. Toyota Motor, November 3, 2004: EP1473819-A1 (288 worldwide citation)

By using a target voltage Vc* of a capacitor connected to the output side of a DC/DC converter and a voltage Vb of a battery connected to the input side of the DC/DC converter, a duty ratio D (Vb/Vc*) as a drive instruction of the DC/DC converter is calculated (S100, S102). By using the voltage Vb, ...


4
Fuminori Suzuki, Singo Ichikawa: DC-to-DC Voltage converter. Citizen Watch Company, Jordan and Hamburg, May 29, 1984: US04451743 (238 worldwide citation)

A DC-to-DC voltage converter is disclosed for converting the voltage from a battery to provide a power supply voltage whose value can be equal to the battery voltage multiplied by or divided by a non-integral factor, e.g. 2/3. The converter operates on the principle of capacitor charge switching, an ...


5
Aaron M Schultz, Charles R Sullivan: Voltage converter with coupled inductive windings, and associated methods. Volterra, Curtis A Vock Esq, Lathrop & Gage L C, March 26, 2002: US06362986 (235 worldwide citation)

A DC-to-DC converter generates an output voltage from an input voltage. The converter includes first and second inductive windings and a magnetic core. One end of the first winding is switched at about 180 degrees out of phase with one end of the second winding, between ground and the input voltage. ...


6
Takao Myono: Multi-stage switched capacitor DC-DC converter. Sanyo Electric, Fish & Richardson P C, December 21, 2004: US06834001 (222 worldwide citation)

A three-stage switched capacitor DC-DC converter capable of generating an output boosted voltage in increments of less than power supply voltage. A first stage of the DC-DC converter comprises two capacitors and three switches, which alternate a connection of the two capacitors. The two capacitors a ...


7
Alvin M Marks: Device for conversion of light power to electric power. April 24, 1984: US04445050 (212 worldwide citation)

This invention relates to a high efficiency device for the direct conversion of light power to electrical power. Present photocells for accomplishing this purpose are well known to the art and have a theoretical efficiency not exceeding about 20%. In practice, realization of efficiency of about 10% ...


8
James D Bucher II: Switching power supply with automatic power factor correction. Zytec Corporation, Merchant Gould Smith Edell Welter & Schmidt, July 28, 1987: US04683529 (207 worldwide citation)

An off-line switching power supply is described which controls the switching transistor of a fly-back circuit in such a fashion as to achieve better than 0.99 power factor control. The technique used for power factor control allows the switching power supply to operate either from AC or DC sources. ...


9
Robert J Huljak, Stephen F Newton, Kenneth A Wallace: FET power converter with reduced switching loss. International Business Machines Corporation, John J McArdle Jr, February 23, 1988: US04727308 (195 worldwide citation)

A DC to DC power converter having reduced switching loss for operation at high frequencies. As disclosed, a buck, or forward, converter includes a first FET as the switching device in series with an inductor and a second FET as the flywheel device. At the common node to which the two FET's and the i ...


10


Click the thumbnails below to visualize the patent trend.