Variable capacitor circuit and integrated circuit containing...

Details Variable capacitor circuit and integrated circuit containing... Variable capacitor circuit and integrated circuit containing...

2005-03-03

2009-02-03

Nguyen, Khanh V (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S307000

Reexamination Certificate

active

07486132

ABSTRACT:
A variable capacitance circuit includes a MOS capacitor, and an application voltage switching section configured to change an application voltage to the MOS capacitor to change a capacitance of the MOS capacitor. The variable capacitance circuit connects the MOS capacitor to an electronic circuit. Here, the electronic circuit may be a voltage amplification circuit, and the variable capacitance circuit may function as an amplification gain switching circuit configured to switch an amplification gain of the voltage amplification circuit, by changing the capacitance to be connected to the voltage amplification circuit.

REFERENCES:
patent: 6486711 (2002-11-01), Tsay et al.
patent: 6731175 (2004-05-01), Chen
patent: 6784742 (2004-08-01), Tsunai et al.
patent: H09-27722 (1997-01-01), None
patent: 2000-138548 (2000-05-01), None
patent: 2002-185274 (2002-06-01), None
patent: 2003-17959 (2003-01-01), None

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