Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2006-08-01
2008-11-04
Wells, Kenneth B (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S148000, C327S157000, C327S537000, C363S059000, C363S060000, C331S057000
Reexamination Certificate
active
07446594
ABSTRACT:
Disclosed is a booster circuit comprising a voltage detection circuit for outputting a decision output signal for detecting a boosted voltage and controlling a voltage boosting operation, an oscillation circuit, and a plurality of charge pump circuits. The oscillation circuit includes an odd number of stages of control-type inverters. When the decision output signal from the voltage detection circuit indicates the voltage boosting operation (oscillation), the odd number of stages of inverters constitute a closed path. Oscillation outputs from outputs of the control-type inverters are thereby extracted, respectively. When the decision output signal indicates a stop of the voltage boosting operation (stop of the oscillation), output values of the control-type inverters are not inverted and held, and the oscillation is thereby stopped. The charge pump circuits receive output signals from the control-type inverters as clock signals, respectively, and operate.
REFERENCES:
patent: 7173478 (2007-02-01), Chun
patent: 2008/0012647 (2008-01-01), Risbo et al.
patent: 11-25673 (1999-01-01), None
Okamoto Toshiharu
Satou Akira
Yamane Kazunori
Cole Brandon S
NEC Electronics Corporation
Wells Kenneth B
Young & Thompson
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