Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2008-05-27
2008-05-27
Patel, Rajnikant B. (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S283000, C315S291000
Reexamination Certificate
active
11730790
ABSTRACT:
A DC/DC converter is supplied such that the desired output setting voltage can be obtained as the load-side output, even when the difference between the power supply voltage and the output setting voltage of the load-side output is large. This DC/DC converter comprises a switching device, a voltage divider, an error amplifier, an oscillator which outputs a oscillation clock, a slope circuit which receives the oscillation clock and outputs a sawtooth waveform voltage having a slope which begins at the leading edge of the oscillation clock, a comparator which compares the sawtooth waveform voltage and the output voltage of the error amplifier, and a logic circuit which is set by the trailing edge of the oscillation clock, and is reset by the output of the comparator.
REFERENCES:
patent: 5436550 (1995-07-01), Arakawa
patent: 6194883 (2001-02-01), Shimamori
patent: 6246222 (2001-06-01), Nilles et al.
patent: 6342822 (2002-01-01), So
patent: 07-336999 (1995-12-01), None
patent: 11-332222 (1999-11-01), None
Doi Mikiya
Nakata Kenichi
Arent & Fox LLP
Patel Rajnikant B.
Rohm & Co., Ltd.
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