Differential amplifier circuit used in solid-state image...

Details Differential amplifier circuit used in solid-state image... Differential amplifier circuit used in solid-state image...

2005-06-14

2005-06-14

Callahan, Timothy P. (Department: 2816)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S257000, C327S538000

Reexamination Certificate

active

06906586

ABSTRACT:
The output terminal of a first voltage-current conversion circuit, which includes operational amplifiers and a resistor, is connected to the output terminal of a second voltage-current conversion circuit which includes operational amplifiers and a resistor, and also to the negative input terminal of the second voltage-current conversion circuit via a source follower as an impedance conversion circuit which is formed by an NMOS transistor and constant current source. Furthermore, the output terminal of the first voltage-current conversion circuit serves as the output terminal of a differential amplifier circuit. The positive-phase input terminal of the second voltage-current conversion circuit is connected to a reference voltage. Since the node of the current outputs of the first and second voltage-current conversion circuits has a high impedance, these circuits operate to equalize their output currents.

REFERENCES:
patent: 4464588 (1984-08-01), Wieser
patent: 4779059 (1988-10-01), Taki et al.
patent: 5012140 (1991-04-01), Bateman
patent: 5157350 (1992-10-01), Rubens
patent: 5387877 (1995-02-01), Robinson
patent: 5493205 (1996-02-01), Gorecki
patent: 6587000 (2003-07-01), Oikawa
U.S. Appl. No. 09/215,195, filed Dec. 18, 1998.
U.S. Appl. No. 09/338,865, filed Jun. 23, 1999.
U.S. Appl. No. 09/625,843, filed Jul. 26, 2000.
U.S. Appl. No. 09/897,033, filed Jul. 3, 2001.

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