Voltage booster having noise reducing structure

Details Voltage booster having noise reducing structure Voltage booster having noise reducing structure

2005-12-06

2005-12-06

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

C327S536000

Reexamination Certificate

active

06972973

ABSTRACT:
In a voltage booster, a voltage detection circuit detects a battery voltage as an input voltage. If the input voltage is lower than a threshold level, an oscillation circuit outputs a gate signal having a relatively high frequency to increase the driving performance of a driving circuit. If the input voltage is higher than the threshold level, the frequency of the gate signal is lowered so as to prevent the driving performance of the driving circuit from rising to an excessively high value. As a result, a predetermined boosted voltage can be obtained regardless of variations in input voltage without using a filter for eliminating noise.

REFERENCES:
patent: 5812018 (1998-09-01), Sudo et al.
patent: 6469569 (2002-10-01), Miyamitsu
patent: 6603673 (2003-08-01), Yamamoto
patent: 6816000 (2004-11-01), Miyamitsu
patent: 2003/0085755 (2003-05-01), Miyamitsu et al.
John F. Dickson, “On-Chip High-Voltage Generation in MNOS Integrated Circuits Using an Improved Voltage Multiplier Technique”,IEEE Journal of Solid-State Circuits, Jun. 1976, pp. 1-6 (discussed in p. 3 of the spec.).

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