FM DEMODULATOR CONSTITUTING FORM USING ELASTICITY SURFACE WAVE

摘要

This method of FM demodulator, for wide-band communication and communication by spectrum diffusion, using an elastic surface wave delay line comprises an input inter-digital transducer (IDT31) to transform middle frequency signal to elastic surface wave, an output inter-digital transducer (IDT32) to transform elastic surface wave to electrical signal, and a delay line composed of output delay inter- digital transducer (IDT33) made by piezo-electric material (32) to get the time delay (t.) from the output of the interdigital transducer (IDT32). The elastic surface delay line wave is used of time delay means.