Transconductance control circuit of rail-to-rail...

Details Transconductance control circuit of rail-to-rail... Transconductance control circuit of rail-to-rail...

2006-05-09

2006-05-09

Barnie, Rexford (Department: 2819)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S254000, C330S261000

Reexamination Certificate

active

07042289

ABSTRACT:
A transconductance control circuit of a rail-to-rail differential input stage is described. The transconductance control circuit senses the gate-source voltages of PMOS and NMOS differential pairs, converts the sensed voltage to a current, compares the current with a reference current, and controls the currents of the PMOS and NMOS differential pairs to control the transconductance of the RTR differential input stage. Also, various types of biasing techniques and matching techniques are used to reduce the variations of the transconductance.

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