Digitally controlled transconductance cell

Details Digitally controlled transconductance cell Digitally controlled transconductance cell

2006-01-10

2006-01-10

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S253000

Reexamination Certificate

active

06985036

ABSTRACT:
A digitally controlled transconductance cell includes a differential transistor pair coupled to load elements (either passive or active with resistive or impedance loads) and a variable bias current source, where the transconductance or gain is digitally varied by changing the aspect ratio of the transistors and the bias current.

REFERENCES:
patent: 5373248 (1994-12-01), Fernandez
patent: 5444414 (1995-08-01), Delano
patent: 5489904 (1996-02-01), Hadidi
patent: 6424134 (2002-07-01), Morishita et al.
patent: 6720798 (2004-04-01), Mulder et al.

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