Class AB output stage with improved frequency stability

Details Class AB output stage with improved frequency stability Class AB output stage with improved frequency stability

1994-07-29

1996-02-13

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330267, H03F 330

Patent

active

054914485

ABSTRACT:
A class AB rail to rail output stage circuit, which includes two complementary output transistors connected in a push-pull manner, facilitates biasing of circuit transistors and improves frequency stability while supporting a wide rail to rail output voltage swing. A differential amplifier compares a biasing voltage applied to a first complementary output transistor to a reference voltage and the differential amplifier output signal is applied for biasing a second complementary output transistor.

REFERENCES:
patent: 4419631 (1983-12-01), Bertails et al.
patent: 4570128 (1986-02-01), Monticelli
patent: 4588960 (1986-05-01), Salama et al.
patent: 4800339 (1989-01-01), Tanimoro et al.
patent: 5140280 (1992-08-01), Vyne et al.
Robert L. Vyne, Thomas D. Petty, Rikki Koda, and David M. Susak; A Quad Low Voltage Rail-to-Rail Operational Amplifier; IEEE 1992 Bipolar Circuits and Technology Meeting; pp. 242-245.

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