Charge pump with a constant current input

Details Charge pump with a constant current input Charge pump with a constant current input

2006-03-07

2006-03-07

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C363S060000

Reexamination Certificate

active

07009445

ABSTRACT:
A semiconductor integrated circuit device capable of avoiding noise generation and suppressing occurrence of an erroneous operation. Provided is a current limiting circuit where a current flowing in an output terminal of a charge pump circuit is sensed with a sensing resistor to be detected by a current detecting circuit to thereby cause an input current to constantly flow in an input terminal of the charge pump circuit in an amount approximately twice larger than an output current, whereby a current is kept constant to suppress a peak current and to avoid the noise generation. Consequently, other circuits connected to an input power source shared with the charge pump circuit are kept from erroneously operating.

REFERENCES:
patent: 5276646 (1994-01-01), Kim et al.
patent: 6107862 (2000-08-01), Mukainakano et al.
patent: 6771115 (2004-08-01), Nakano
patent: 6865116 (2005-03-01), Kim et al.

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