Current amplifier

Details Current amplifier Current amplifier

1975-04-28

1976-04-27

Rolinec, R. V.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330 18, 330 19, 330 22, 330 38M, H03F 316

Patent

active

039538079

ABSTRACT:
A three-terminal current amplifier having a current gain substantially independent of the forward current gains of its component FET's. First and second FET's have source electrodes connected to the common terminal of the amplifier. A third FET has its source electrode connected to the second FET drain electrode and has its gate and drain electrodes connected to the input terminal and the output terminal of the amplifier, respectively. The gate electrodes of the first and second FET's and the first FET drain electrode are coupled to the input terminal by a potential source providing an offset potential smaller than the source-to-gate potential of an FET, which permits the potentials required between the common terminal and each of the input and output terminals to be reduced as compared to prior art FET amplifiers of this sort.

REFERENCES:
patent: 3775693 (1973-11-01), Proebsting
B387,171, 01001975, Schader, Jr., 340/35.

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