Transistor circuit with base-current compensation

Details Transistor circuit with base-current compensation Transistor circuit with base-current compensation

1989-10-03

1991-03-05

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, H03F 345

Patent

active

049980742

ABSTRACT:
An emitter-coupled transistor pair consisting of a first (T1) and a second (T2) transistor in which the a.c. component (+ib) in the base-current of the first transistor is compensated for by the a.c. component (-ib) of the second transistor. A replica of the later a.c. component (-ib) is available in the base-current of a third transistor (T3) which has its collector-emitter path connected in the collector line of the second transistor and which has its base coupled to the base of the first transistor.

REFERENCES:
patent: 3714600 (1973-01-01), Kuijk et al.
Commander, "Magnetic Head Preamplifier", IBM Technical Disclosure Bulletin, vol. 16, No. 5, Oct. 1973, pp. 1657, 1658.
Voorman et al., "Integration of Analog Filters in a Bipolar Process", IEEE Journal of Solid State Circuits, vol. SC-17, No. 4, Aug. 1982, pp. 713-722.

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