Digital FSK demodulator

Details Digital FSK demodulator Digital FSK demodulator

1997-10-27

2000-11-07

Kinkead, Arnold

Demodulators

Frequency shift keying or minimum shift keying demodulator

329303, 375324, 375334, 375340, 455214, H04L 2714

Patent

active

061442534

ABSTRACT:
A FSK demodulator which uses the combination of a digital phase comparator and a digital controlled oscillator (DCO) in the form of a state machine to demodulate an FSK signal. The phase comparator compares the phase of the FSK signal with the output of the DCO to provide a signal to the DCO having a level dependent on the phase relationship between the two signals at the input to the comparator. The demodulator also includes a filter to obtain the data from the signal at the output of the comparator.

REFERENCES:
patent: 3656064 (1972-04-01), Giles et al.
patent: 5311556 (1994-05-01), Baker

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