Differential amplifier

Details Differential amplifier Differential amplifier

1991-11-12

1993-02-02

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, H03F 345

Patent

active

051840863

ABSTRACT:
A differential amplifier comprises: first and second transistors the emitters of which are connected to each other through a resistance element; a third transistor to the emitter of which a current equal to the collector current of the first transistor is applied; and a fourth transistor to the emitter of which a current equal to the collector current of the second transistor is applied. Signals provided at the emitters of the third and fourth transistors, after being level-shifted, are supplied to the bases of the second and first transistors, respectively. Thereby, a differential amplifier which is linear in transfer characteristic and large in input dynamic range is obtained.

REFERENCES:
patent: 4081758 (1978-03-01), Steckler
patent: 4774475 (1988-09-01), LaVoie
patent: 4820997 (1989-04-01), Sano et al.
Japanese Abstract No. 62-120109 E-554, Nov. 7, 1987, vol. 11, No. 341.
Japanese Abstract No. 2-288504 A.E.-1033, Feb. 14, 1991, vol. 15, No. 62.
Japanese Abstracts No. 62-1000009 A. E-546, Oct. 6, 1987, vol. 11, No. 06.

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