Audio detector circuit

Details Audio detector circuit Audio detector circuit

1978-09-27

1980-10-21

Chatmon, Jr., Saxfield

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328 58, 328138, 307231, 307233A, H03K 329

Patent

active

042296668

ABSTRACT:
A detector with independent TURNON and TURNOFF time constants. The TURNOFF time constant is connected between the output of an input transistor and the input of an output transistor. The TURNON time constant is coupled by a diode to the output of the output transistor and is connected to a Schmitt Trigger, ultimately driving an ON/OFF relay in a television receiver. Although the time constants are independently selectable, in a specific application of the invention the TURNON time constant may be chosen to be approximately twice the period of the detector input signal and about five times the TURNOFF time constant. Various configurations of series and parallel RC time constants are shown.

REFERENCES:
patent: 3209173 (1965-09-01), Rumble
patent: 3260864 (1966-07-01), Nourney
patent: 3302037 (1967-01-01), Neumann
patent: 3403269 (1968-09-01), Thompson
patent: 3571626 (1971-03-01), Reif
patent: 3584241 (1971-06-01), Nakamura

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