Adjustable gain current amplifiers

Details Adjustable gain current amplifiers Adjustable gain current amplifiers

1976-05-21

1977-08-30

Dahl, Lawrence J.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330 22, 330 26, 330 29, 330 30D, H03F 132, H03F 345

Patent

active

040457460

ABSTRACT:
The current gain of a current mirror amplifier (CMA) is trimmed by applying an adjustable potential difference between the base-emitter potentials of first and second transistors of the CMA, this potential difference being substantially linearly proportional to the absolute temperature at which the first and second transistors are operated. The resultant trim maintains itself over a wide range of temperature.

REFERENCES:
patent: 3660694 (1972-05-01), Lucas
patent: 3825778 (1974-07-01), Ahmed

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