Electricity: power supply or regulation systems – Output level responsive – Using a transformer or inductor as the final control device
Reexamination Certificate
2008-06-24
2008-06-24
Laxton, Gary L (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a transformer or inductor as the final control device
C323S271000, C323S284000
Reexamination Certificate
active
07391189
ABSTRACT:
A step-up/down DC-DC converter is disclosed that includes: a step-up/down part generating an output voltage by stepping up or down an input voltage; and a control part generating an error signal indicating an error between a voltage value obtained by dividing the output voltage and a predetermined reference voltage, and causing the step-up/down part to perform a step-up or step-down operation based on the comparison between the error signal and first and second triangle wave signals. The control part includes a first circuit generating the first triangle wave signal for step-down control and a second circuit generating the second triangle wave signal for step-up control. The first circuit generates a clock signal synchronized with the first triangle wave signal, and outputs the clock signal to the second circuit. The second circuit generates the second triangle wave signal synchronized with the first triangle wave signal based on the input clock signal.
REFERENCES:
patent: 5914591 (1999-06-01), Yasuda
patent: 6166527 (2000-12-01), Dwelley et al.
patent: 7202644 (2007-04-01), Nitta et al.
patent: 1 146 629 (2001-10-01), None
patent: 05-275985 (1993-10-01), None
patent: 2000-166223 (2000-06-01), None
patent: 2001-086740 (2001-03-01), None
patent: 2003-070247 (2003-03-01), None
Matsuo Masahiro
Nitta Shohichi
Nomura Ritsuko
Dickstein & Shapiro LLP
Laxton Gary L
Ricoh & Company, Ltd.
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