Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1980-06-03
1982-07-27
Miller, Jr., Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307493, 328145, G06G 712, G06G 724
Patent
active
043419623
ABSTRACT:
An electronic gain control device including a first bipolar circuit having log transfer functional elements, preferably in the form of a pair of parallel first transistors of different polarities, and a second bipolar circuit including antilog transfer function elements, preferably a pair of second transistors connected in parallel and of opposite polarity. A gain control signal is summed with the log output signal of the first bipolar circuit to produce a second output signal antilogarithmically related to the first output signal and the gain control signal.
The log and antilog transfer functional elements receive a bias signal of sufficient magnitude relative to the input signal that the entire circuit is in continuous electrical conduction in order to operate in a class A domain.
Preferably a diode, such as a diode connected transistor, is connected in series with each emitter lead in each of the transistors incorporated in the first bipolar and second bipolar circuits to provide class A operation with a minimum of distortion and noise.
REFERENCES:
patent: 3532868 (1970-10-01), Embley
patent: 3681618 (1972-08-01), Blackmer
patent: 3714462 (1973-01-01), Blackmer
patent: 4109165 (1978-08-01), Katakura et al.
patent: 4225794 (1980-09-01), Buff
patent: 4234804 (1980-11-01), Bergstrom
Davis B. P.
Lackey Harrington A.
Miller, Jr. Stanley D.
Valley People, Inc.
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