The LM567/NE567/SE567 is general purpose tone decoders designed to provide a saturated transistor switch to ground when an input signal is present within the pass band.
The circuit consists of an I and Q detector driven by a voltage controlled oscillator which determines the center frequency of the decoder. External components are used to independently set center frequency, bandwidth and output delay.
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The LM567/NE567/SE567 is general purpose tone decoders designed to provide a saturated transistor switch to ground when an input signal is present within the pass band.
The circuit consists of an I and Q detector driven by a voltage controlled oscillator which determines the center frequency of the decoder. External components are used to independently set center frequency, bandwidth and output delay.