Differential transimpedance amplifier

Details Differential transimpedance amplifier Differential transimpedance amplifier

1995-08-08

1997-02-25

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330252, 330258, H03F 345

Patent

active

056062885

ABSTRACT:
A circuit and method for reducing the output impedance and the common mode gain in a differential transimpedance amplifier sets the input impedance for the differential transimpedance amplifier, giving it one value for differential inputs and another value for common mode inputs. The circuit and method sets the effective input impedance for the amplifier equal to the negative of amplifier's feedback resistor impedance for differential inputs, and to low, positive value for common mode inputs.

REFERENCES:
patent: 3832646 (1974-08-01), Szabo et al.
patent: 4409556 (1983-10-01), Van Kessel
patent: 4476440 (1984-10-01), Bennett, Jr.
patent: 5132640 (1992-07-01), Tanaka et al.
patent: 5138276 (1992-08-01), Marks
Taub, "Differential Amplifier With High Input Impedance," IBM Technical Disclosure Bulletin, vol. 9, No. 11, Apr. 1967, pp. 1637, 1638.

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