Rail-to-rail gain stage of an amplifier

Details Rail-to-rail gain stage of an amplifier Rail-to-rail gain stage of an amplifier

1994-06-02

1995-08-08

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330263, H03F 330

Patent

active

054402735

ABSTRACT:
A gain stage for use in an amplifier which provides a rail-to-rail output signal. The gain stage includes a first transistor having a base, an emitter and a collector, the base being coupled to an input signal applied to the gain stage and the emitter being coupled to a first source of operating potential; a second transistor having a base, an emitter and a collector, the collector being coupled to the collector of the first transistor for providing the output signal, the emitter being coupled to a second source of operating potential; and a third transistor having a base, an emitter and a collector, the emitter being coupled to the input signal, the base being coupled to a bias voltage, and the collector being coupled to the second operating potential and the base of the second transistor for providing a drive signal thereto allowing the output signal to swing substantially between the first and second sources of operating potential.

REFERENCES:
patent: 4218638 (1980-08-01), Breithaupt
patent: 4570128 (1986-02-01), Monticelli
patent: 5140280 (1992-08-01), Vyne et al.
patent: 5153529 (1992-10-01), Koda et al.
patent: 5162751 (1992-11-01), Blanken et al.

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