Threshold signal regulator. Scheme, description

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Threshold signal regulator. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Tone, volume controls

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The sensitivity of the circuit is about 1mV, the response threshold is 30mV. The response threshold increases with a decrease in the value of the resistor R1. When triggered, the open-collector transistor at the output of U1A opens to saturation and turns on the controlled device, such as a low-frequency amplifier.

Threshold signal controller

The scope of such devices is quite large - from voice control devices in telephony to circuit breakers or sensors that respond to voice or low-frequency signals.

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