Gain control scheme independent of process, voltage and...

Details Gain control scheme independent of process, voltage and... Gain control scheme independent of process, voltage and...

2007-11-06

2007-11-06

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S253000, C330S311000

Reexamination Certificate

active

11167359

ABSTRACT:
An apparatus and method to use a shunt network across source terminals of cascode transistors that drive a differential current to control gain. When the gates of the cascode transistors and transistors of the shunt network are activated by a same bias voltage, the gain control is substantially independent of process, voltage and temperature variations.

REFERENCES:
patent: 3988598 (1976-10-01), Ishigaki et al.
patent: 5198780 (1993-03-01), Kase
patent: 5210504 (1993-05-01), Yagita et al.
patent: 5889432 (1999-03-01), Ho
patent: 6737919 (2004-05-01), Cyrusian
patent: 7109794 (2006-09-01), Killat
“5-GHz CMOS Radio Transceiver Front-End Chipset”; Ting-Ping Liu et al.; IEEE Journal of Solid-State Circuits, vol. 35, No. 12; Dec. 2000; pp. 1927-1933.

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