Texas Instruments Incorporated
Cascode bias for comparator

Abstract:

A comparator having: a first transistor coupled to a first input terminal; a first current source coupled to the first transistor; a second transistor coupled to a second input terminal and coupled to the first current source; a third transistor coupled in series with the first transistor; a fourth transistor coupled in series with the second transistor; a fifth transistor coupled in series with the first transistor; a sixth transistor coupled in series with the second transistor; a seventh transistor coupled to the first input terminal and coupled as a source follower to the fifth transistor; and an eighth transistor coupled to the second input terminal and coupled as a source follower to the sixth transistor. The comparator also including a differential amplifier coupled to the first output terminal and coupled to the second output terminal.