Differential amplifier with common-mode rejection

Details Differential amplifier with common-mode rejection Differential amplifier with common-mode rejection

1994-01-24

1995-05-23

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330258, 330311, H03F 345

Patent

active

054184932

ABSTRACT:
A differential amplifier with common-mode rejection has input transistors (T1, T2) whose drains are coupled to a first output terminal (10) and a second output terminal (12), respectively, and to the drains of current-source transistors (T3, T4) whose sources are each connected to a supply terminal (18) via a parallel arrangement of two control transistors (T5A/T6A, T5B/T6B) in order to reject the common-mode component at the output terminals (10, 12). Of each pair of control transistors the gate of the one transistor (T5A, T5B) is coupled to the first output terminal (10) and the gate of the other transistor (T5B, T6B) is coupled to second output terminal (12).

REFERENCES:
patent: 5166635 (1992-11-01), Shih
S. J. Daubert, "A Transistor-Only Current-Mode Sigma Delta Modulator", IEEE Journal of Solid State Circuits, vol. 27, No. 5, May 1992, pp. 821-830.

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