Low voltage rail-to-rail CMOS input stage

Details Low voltage rail-to-rail CMOS input stage Low voltage rail-to-rail CMOS input stage

2005-03-22

2005-03-22

Nguyen, Khanh V. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

06870422

ABSTRACT:
The present invention discloses a low voltage rail-to-rail CMOS input stage. The input stage includes a differential pail of P-channel metal oxide semiconductor field effect (PMOS) transistors, which produces differential output current signal. The input stage further includes a pair of N-channel depletion-mode metal oxide semiconductor field effect (NMOS) transistors, coupled to the bulk terminals of the differential pair of PMOS transistors, for receiving an input signal. The depletion-mode NMOS transistors further act as source follower devices to drive the bulk terminals of the differential pair of PMOS transistors.

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