The LM567 and LM567CMX are general purpose tone decoders designed to provide a saturated transistor switch to ground when an input signal is present within the passband. 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.
Feature
- 20 to 1 Frequency Range With an External Resistor
- Logic Compatible Output With 100-mA Current Sinking
Capability - Bandwidth Adjustable From 0 to 14%
- High Rejection of Out of Band Signals and Noise
- Immunity to False Signals
- Highly Stable Center Frequency
- Center Frequency Adjustable from 0.01 Hz to
500 kHz
