Current steering variable gain amplifier with linearizer

Details Current steering variable gain amplifier with linearizer Current steering variable gain amplifier with linearizer

1998-07-02

1999-12-07

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including differential amplifier

327346, H03F 345, G06F 7556

Patent

active

059990538

ABSTRACT:
A current steering circuit includes a first current steering pair of differentially coupled transconductance devices for current steering an input current signal to an output of the current steering circuit. A linearizer circuit includes a second pair of differentially coupled devices coupled electrically in parallel with the first current steering pair so that any current steering which takes place in the second pair is mirrored by the first pair. The linearizer circuit controls the second differential pair so that the current through the devices of the second differential pair that are coupled to the output device of the first current steering pair is exponentially dependent on the differential input voltage.

REFERENCES:
patent: 4017804 (1977-04-01), Hunsinger
patent: 5570056 (1996-10-01), Groe
patent: 5602504 (1997-02-01), Liu

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