Programmable gain current amplifier

Details Programmable gain current amplifier Programmable gain current amplifier

2006-08-08

2006-08-08

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S257000

Reexamination Certificate

active

07088180

ABSTRACT:
A programmable gain current amplifier is provided, including a transistor pair, a plurality of differential pairs, and a control device. The transistor pair receives an input current. Each differential pairs connecting with each other in parallel is connected to the transistor pair to form a differential current mirror for amplifying the input current. The control device adjusts the output polarity of the current mirror, thereby obtaining a predetermined gain between the output of the current mirror and the input current. Therefore, amplification of the input current at a programmable gain is realized.

REFERENCES:
patent: 4361815 (1982-11-01), Schade, Jr.
patent: 5565815 (1996-10-01), Klein
patent: 6028484 (2000-02-01), Cole et al.
patent: 6121830 (2000-09-01), Manninen
patent: 6175278 (2001-01-01), Hasegawa
patent: 6538632 (2003-03-01), Yamazaki et al.
patent: 6864748 (2005-03-01), Richardson

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