Current mirror amplifiers with programmable current gains

Details Current mirror amplifiers with programmable current gains Current mirror amplifiers with programmable current gains

1976-04-08

1977-12-20

Gruber, Felix D.

Communications: electrical

Audible indication

Percussion-type sound producer

307304, 330288, H03K 1302, H03F 316

Patent

active

040645061

ABSTRACT:
A current mirror amplifier in which at least one of the mirroring transistors is a composite transistor in which the number of simple transistors parallelled to form the composite transistor can be selected in response to a digital signal to program the current gain of the current mirror amplifier in accordance with said digital signal. Current mirror amplifiers with programmable current gains are useful, for example, in the multiplication and/or division of analog information by digital multipliers, and in digital-to-analog conversion.

REFERENCES:
patent: RE28633 (1975-11-01), Pastoriza
patent: 3392342 (1968-07-01), Ordower
patent: 3801831 (1974-04-01), Dame
patent: 3855541 (1974-12-01), Leidich
patent: 3936725 (1976-02-01), Schneider
patent: 3940760 (1976-02-01), Brokaw
patent: 3946327 (1976-03-01), Hsu
patent: 3978473 (1976-08-01), Pastoriza
patent: 3984830 (1976-10-01), Buchanan et al.
patent: 4024415 (1977-05-01), Matsuura
Hartley, Digital Word Sets Gain Amplifier Electronics, July 10, 1975, pp. 94, 95.

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