Transresistance amplifier

Details Transresistance amplifier Transresistance amplifier

2007-04-10

2007-04-10

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

C330S288000, C341S153000

Reexamination Certificate

active

11153939

ABSTRACT:
A transresistance amplifier circuit includes an input terminal receiving an input current, an output terminal providing an output voltage indicative of the input current, a first bias current source providing a first bias current to the input terminal, a first transistor, a second transistor, and a biasing circuit. The first transistor is coupled between the output terminal and the input terminal and controlled by a first bias voltage. The second transistor is coupled between a first supply voltage and the output terminal and controlled by a second bias voltage. The biasing circuit generates the first bias voltage for the first transistor for imposing a first voltage at the input terminal. The first voltage is equivalent to a selected voltage of an application circuit and the biasing circuit generates the first bias voltage in a manner so as to allow the first voltage to track variations in the selected voltage.

REFERENCES:
patent: 4217546 (1980-08-01), Milkovic
patent: 4866261 (1989-09-01), Pace
patent: 5663728 (1997-09-01), Essenwanger
patent: 5923216 (1999-07-01), Pennock
patent: 6639431 (2003-10-01), Potter
patent: 6882294 (2005-04-01), Linder et al.

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