Transconductance circuit with improved linearity

Details Transconductance circuit with improved linearity Transconductance circuit with improved linearity

2008-05-06

2008-05-06

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including field effect transistor

Reexamination Certificate

active

07368993

ABSTRACT:
A transconductance circuit, comprising: first and second field effect transistors, each having a drain, a source and a gate; wherein the first transistor is in a first current flow path between first and second nodes of the circuit, and is biased so as to operate in a saturation region of its transfer characteristic; the second field effect transistor is in a second current flow path between the first and second nodes of the circuit and is biased so as to operate in a linear region of its transfer characteristic; the gate of the first and second transistors are connected to receive an input signal; and wherein the second transistor is further in series with a voltage modulator adapted to reduce the drain-source voltage occurring across the second transistor in response to increased current flow in the second transistor.

REFERENCES:
patent: 6396311 (2002-05-01), Inn
patent: 2006/0097788 (2006-05-01), Yang et al.

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