Semiconductor device comprising a two-stage differential amplifier

U.S. Patent Number: 5389891

Abstract: A semiconductor device comprises a two-stage differential amplifier, the amplifier comprising a first differential transistor pair whose transistors are coupled by their source electrodes and each receive an input signal, and a second differential transistor pair whose transistors are coupled by their source electrodes, each of these transistors receive the output of one of the branches of the first differential pair, and each supply an output. In the amplifier each branch of the second differential pair is arranged in series with a branch of the first differential pair so as to form two sub-circuits each including a transistor of the first pair with its load and a transistor of the second pair with its load in a manner such that the two transistors of each sub-circuit share the same current.

Inventors: Philippe; Pascal (Caen, FR)

Assignee: U.S. Philips Corporation (New York, NY)

Application Number: 07/995,452

Issued: 1995-02-14

Expired: 2007-02-14

Classes: 330/253 ; 330/310

Field of search: 330/252,253,258,261,310

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