Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2008-07-08
2008-07-08
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S536000
Reexamination Certificate
active
11493673
ABSTRACT:
The composing circuit outputs a lower voltage out of voltages output from the constant voltage generation circuit and the dummy pump circuit as a voltage to the sensing circuit. The sensing circuit compares voltages to generate a pump activation signal for activating the pump circuit. Since when an external power supply voltage is a low voltage, the voltage applied to the sensing circuit will be an output voltage of the dummy pump circuit having the same output characteristics as those of the pump circuit in place of the reference voltage, no pump activation signal is generated. As a result, when the external power supply voltage is a low voltage, power consumption can be suppressed without uselessly outputting a pump activation signal.
REFERENCES:
patent: 6069518 (2000-05-01), Nakai et al.
patent: 6191994 (2001-02-01), Ooishi
patent: 6282108 (2001-08-01), Yang
patent: 6510394 (2003-01-01), Huang et al.
patent: 6771115 (2004-08-01), Nakano
patent: 2004-63019 (2004-02-01), None
patent: 2004-280923 (2004-10-01), None
Le Dinh T.
McDermott Wiil & Emery LLP
Renesas Technology Corp.
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