Frequency shift demodulator(748)composed of active power filter

Published:2011/7/18 22:44:00 Author:zj | Keyword: Frequency shift demodulator, active power filter | From:SeekIC

As shown in the figure it is frequency shift demodulator composed of active power filter. Using active power filter instead of LC tuning circuit can makes the frequency shift keying demodulator avoid the use of large and expensive inductors. It not only has the advantagesof small volume, but also improves the performance of demodulation device. The circuit is used for demodulating the 110 bit frequency shift keying signal. Its symbol frequency is 2225Hz. Space frequency is 2025Hz.



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