Amplifier circuit and analog-to-digital circuit using the same

Details Amplifier circuit and analog-to-digital circuit using the same Amplifier circuit and analog-to-digital circuit using the same

2007-02-06

2007-02-06

Nguyen, Linh V. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S172000, C341S155000

Reexamination Certificate

active

11073720

ABSTRACT:
One or more input capacitors are connected to an inverting input terminal of an operational amplifier. Connected to the respective input capacitors are switches for on-off control of the input of an input signal, switches for on-off control of the input of another input signal, switches for on-off control of the input of a higher reference voltage and switches for on-off control of the input of a lower reference voltage. The switches for on-off control of the input of an input signal and the switches for on-off control of the input of another input signal are controlled by independent control signals.

REFERENCES:
patent: 5416485 (1995-05-01), Lee
patent: 6195032 (2001-02-01), Watson et al.
patent: 6320530 (2001-11-01), Horie
patent: 6366230 (2002-04-01), Zhang et al.
patent: 6617992 (2003-09-01), Sakurai
patent: 6642871 (2003-11-01), Takeyabu et al.
patent: 6784824 (2004-08-01), Quinn
patent: 7009549 (2006-03-01), Corsi
patent: 2005/0140537 (2005-06-01), Waltari
patent: 4-026229 (1992-01-01), None

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