Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2011-01-18
2011-01-18
Patel, Rajnikant B (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C323S235000
Reexamination Certificate
active
07872883
ABSTRACT:
In one embodiment, a power converter system includes a switching circuitry having a plurality of switches operable to be turned on and off to cause current to flow to deliver power to a load. A driver circuitry is responsive to an oscillation signal and generates control signals for turning on and off the switches in the switching circuitry. A free-running oscillator circuitry provides the oscillation signal to the driver circuitry. The free-running oscillator circuitry has an operational amplifier. A frequency of the oscillation signal will be higher if the operational amplifier outputs a first value, and the frequency of the oscillation signal will be lower if the operational amplifier outputs a second value.
REFERENCES:
patent: 3491252 (1970-01-01), Petrohilos
patent: 3555399 (1971-01-01), Buchanan et al.
patent: 3840797 (1974-10-01), Aggen et al.
patent: 3916224 (1975-10-01), Daniels et al.
patent: 4072965 (1978-02-01), Kondo
patent: 4143282 (1979-03-01), Berard, Jr. et al.
patent: 4228493 (1980-10-01), de Sarte et al.
patent: 4236198 (1980-11-01), Ohsawa et al.
patent: 4495554 (1985-01-01), Simi et al.
patent: 4559590 (1985-12-01), Davidson
patent: 4622627 (1986-11-01), Rodriquez et al.
patent: 4695936 (1987-09-01), Whittle
patent: 4706176 (1987-11-01), Kettschau
patent: 4706177 (1987-11-01), Josephson
patent: 4712169 (1987-12-01), Albach
patent: 4720641 (1988-01-01), Faini
patent: 4725769 (1988-02-01), Cini et al.
patent: 4734839 (1988-03-01), Barthold
patent: 4739462 (1988-04-01), Farnsworth et al.
patent: 4806844 (1989-02-01), Claydon et al.
patent: 4809148 (1989-02-01), Barn
patent: 4811184 (1989-03-01), Koninsky et al.
patent: 4814674 (1989-03-01), Hrassky
patent: 4858094 (1989-08-01), Barlage
patent: 4862339 (1989-08-01), Inou et al.
patent: 4866590 (1989-09-01), Odaka et al.
patent: 4870555 (1989-09-01), White
patent: 4887199 (1989-12-01), Whittle
patent: 4888497 (1989-12-01), Dallabora et al.
patent: 4890210 (1989-12-01), Myers
patent: 4928220 (1990-05-01), White
patent: 4930063 (1990-05-01), Henze et al.
patent: 4937728 (1990-06-01), Leonardi
patent: 4943903 (1990-07-01), Cardwell, Jr.
patent: 4943907 (1990-07-01), Godwin
patent: 5012401 (1991-04-01), Barlage
patent: 5014178 (1991-05-01), Balakrishnan
patent: 5021937 (1991-06-01), Cohen
patent: 5034871 (1991-07-01), Okamoto et al.
patent: 5041956 (1991-08-01), Marinus
patent: 5072353 (1991-12-01), Feldtkeller
patent: 5086364 (1992-02-01), Leipold et al.
patent: 5146394 (1992-09-01), Ishii et al.
patent: 5161098 (1992-11-01), Balakrishnan
patent: 5177408 (1993-01-01), Marques
patent: 5200886 (1993-04-01), Schwarz et al.
patent: 5245526 (1993-09-01), Balakrishnan et al.
patent: 5297014 (1994-03-01), Saito et al.
patent: 5313381 (1994-05-01), Balakrishnan
patent: 5394017 (1995-02-01), Catano et al.
patent: 5452195 (1995-09-01), Lehr et al.
patent: 5459392 (1995-10-01), Mandelcorn
patent: 5461303 (1995-10-01), Leman et al.
patent: 5481178 (1996-01-01), Wilcox et al.
patent: 5508602 (1996-04-01), Borgato et al.
patent: 5528131 (1996-06-01), Marty et al.
patent: 5552746 (1996-09-01), Danstrom
patent: 5563534 (1996-10-01), Rossi et al.
patent: 5568084 (1996-10-01), McClure et al.
patent: 5570057 (1996-10-01), Palara
patent: 5572156 (1996-11-01), Diazzi et al.
patent: 5615093 (1997-03-01), Nalbant
patent: 5617016 (1997-04-01), Borghi et al.
patent: 5619403 (1997-04-01), Ishikawa et al.
patent: 5621629 (1997-04-01), Hemminger et al.
patent: 5640317 (1997-06-01), Lei
patent: 6107851 (2000-08-01), Balakrishnan et al.
patent: 0 651 440 (1995-05-01), None
patent: 0 694 966 (1996-01-01), None
patent: 0 736 957 (1996-10-01), None
patent: 0 740 491 (1996-10-01), None
patent: 0 748 034 (1996-12-01), None
patent: 0 748 035 (1996-12-01), None
patent: 0 751 621 (1997-01-01), None
patent: WO 83/01157 (1983-03-01), None
R. Brucker, et al., “Optimizing Converter Design and Performance Utilizing Micro Controller System Feedback and Control,” Proceedings of Powercon 8, E-2, pp. 1-10, 1981.
A.J. Bowen, et al., Power Supply with Optical Isolator, IBM Technical Disclosure Bulletin, vol. 14, No. 11, pp. 3320, Apr. 1972.
A. Halperin, “Primary Regulated Dual Power Supply,” IBM Technical Disclosure Bulletin, vol. 21, No. 10, pp. 4299-4300, Mar. 1979.
H.S. Hoffman, Jr., et al., “Proportional Drive Supply with Diversion Control,” IBM Technical Disclosure Bulletin, vol. 21, No. 12, pp. 4904-4905, May 1979.
D. Azzis, et al., “Flyback on Card Power Supply,” IBM Technical Disclosure Bulletin, vol. 23, No. 4, pp. 1477-1478, Sep. 1980.
B. Pelly, et al., “Power MOSFETs Take the Load Off Switching Supply Design,” Electronic Design, pp. 135-139, Feb. 1983.
“5-W DC-DC Converters Aim at Telecomm Applications,” Electronic Design, vol. 31, No. 15, p. 227, Aug. 1985.
“Combined Switch-Mode Power Amplifier and Supply,” IBM Technical Disclosure Bulletin, vol. 28, No. 3, pp. 1193-1195, Aug. 1985.
“Off-Line Power Supply Control Technique Using a Single Transformer to Back Three Control Signals,” IBM Technical Disclosure Bulletin, vol. 32, No. 8A, Jan. 1990, pp. 272-273, Jan. 1990.
H.S. Hoffman, Jr., “Self-Generated Bias Supply,” IBM Technical Disclosure Bulletin, vol. 20, No. 5, pp. 1814-1815, Oct. 1997.
Ashok Bindra, “Power-Conversion Chip Cuts Energy Wastage in Off-Line Switchers,” Electric Design, pp. 46 & 48, Oct. 1998.
Fairchild Semiconductor Corporation
Patel Rajnikant B
Sidley Austin LLP
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