Apparatus for input amplifier stage

Details Apparatus for input amplifier stage Apparatus for input amplifier stage

1984-06-04

1985-07-16

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330260, 330261, 330308, H03F 345

Patent

active

045299471

ABSTRACT:
A differential stage of an amplifier includes an input transistor and a second transistor with a significantly greater emitter cross-sectional area than the input transistor. Quiescent emitter current is divided between the two transistors in substantially the same ratio as the emitter cross-sectional areas so that the emitter current densities are substantially equal.

REFERENCES:
patent: 3700921 (1972-10-01), Gay
patent: 3918004 (1975-11-01), Shimizu et al.
patent: 4117391 (1978-09-01), Janssen
patent: 4230953 (1980-10-01), Wilcox
Bhola et al., "Low Drift Design of Differential DC Amplifiers," Electronic Engineering, Oct. 1966, pp. 659-661.

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