Low-voltage common source switched-capacitor amplifier

Details Low-voltage common source switched-capacitor amplifier Low-voltage common source switched-capacitor amplifier

1998-12-16

2000-04-11

Pascal, Robert

Amplifiers

With periodic switching input-output

330 86, H03F 102

Patent

active

060492473

ABSTRACT:
The present disclosure describes a low-voltage switched-capacitor amplifier circuit that operates with supply voltage as low as one volt. The switched-capacitor amplifier circuit includes a voltage-amplifying transistor configured in a switched-capacitor network by an input capacitor and a feedback capacitor. The gate terminal of the voltage-amplifying transistor is connected to the supply voltage through a first switch that turns on during stage 1 of the reset phase. During stage 2, the first switch opens and a second switch is closed. The second switch is in series with a second transistor. The second transistor maintains certain voltage difference between the input and the output and keeps the output voltage from pulling the input voltage down to ground.

REFERENCES:
patent: 4179665 (1979-12-01), Gregorian
patent: 4331894 (1982-05-01), Gregorian et al.
patent: 4404525 (1983-09-01), Amir et al.
patent: 4617481 (1986-10-01), Masuda
patent: 5880630 (1999-03-01), Iwamoto et al.

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