Variable transconductance circuit

Details Variable transconductance circuit Variable transconductance circuit

2006-07-07

2009-02-03

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S254000

Reexamination Certificate

active

07486139

ABSTRACT:
The variable transconductance circuit includes: a voltage-current conversion circuit for outputting a current signal linear with an input voltage signal; first and second MOS transistors for converting the current signal received to a square-root compressed voltage signal; and third and fourth MOS transistors for converting the square-root compressed voltage signal to a linear current signal. A bias current at the first and second MOS transistors and a bias current at the third and fourth MOS transistors are varied to control transconductance.

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Chinese Office Action dated Jul. 11, 2008 and issued in a corresponding Chinese Patent Application.
Japanese Office Action, with English translation, issued in Japanese Patent Application No. JP 2006-110550, mailed Aug. 5, 2008.

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