Отправил alexfloka.Дата добавления 28.04.2011 (3897 прочтений)
Tone Decoder General Description The LM567 and LM567C 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 indepen- dently set center frequency, bandwidth and output delay. Features . 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 Applications . Touch tone decoding . Precision oscillator . Frequency monitoring and control . Wide band FSK demodulation . Ultrasonic controls . Carrier current remote controls . Communications paging decoders