Integrated circuit for stabilizing a voltage

Details Integrated circuit for stabilizing a voltage Integrated circuit for stabilizing a voltage

2007-03-27

2007-03-27

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S543000

Reexamination Certificate

active

11123226

ABSTRACT:
An integrated circuit includes an input terminal (IN) for application of a supply voltage (Vext) and an output terminal (A) for generation of an output voltage (Vout). A first branch including a first controllable resistance (T1) and a second branch including a charge pump (10) and a second controllable resistance (T2) are connected between the input terminal (IN) and the output terminal (A). A control circuit (20) alters the resistance values of the first and second controllable resistances (T1, T2) in a manner dependent on a ratio of an actual value (Vout) of the output voltage to a desired value (VSout) of the output voltage and a ratio of an actual value (Vext) of the supply voltage to a desired value (VSext) of the supply voltage. As a result, the output voltage (Vout) can be stabilized to the desired value (VSout) virtually independently of fluctuations of the supply voltage.

REFERENCES:
patent: 5528129 (1996-06-01), Kaneko et al.
patent: 6002295 (1999-12-01), Gens et al.
patent: 6262567 (2001-07-01), Bartlett
patent: 6404274 (2002-06-01), Hosono et al.
patent: 6566935 (2003-05-01), Renous
patent: 6791212 (2004-09-01), Pulvirenti et al.
patent: 6906576 (2005-06-01), Sivero et al.

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