FSK demodulator

Details FSK demodulator FSK demodulator

2007-11-20

2007-11-20

Chang, Joseph (Department: 2817)

Demodulators

Frequency shift keying or minimum shift keying demodulator

C329S303000, C375S334000

Reexamination Certificate

active

11359479

ABSTRACT:
An FSK demodulator which outputs an enable signal in response to the detection of a data change point in a detected signal of an amplitude associated with the received frequency of an input FSK signal, outputs an average signal of the detected signal for each predetermined time period, acquires the average signal in response to the enable signal to output as an offset signal an average value of M average signals, and subtracts the offset signal from the detected signal to output the resulting signal.

REFERENCES:
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patent: 4472816 (1984-09-01), Thompson
patent: 4716376 (1987-12-01), Daudelin
patent: 5781588 (1998-07-01), Abe et al.
patent: 6-54004 (1994-02-01), None
patent: 7-231338 (1995-08-01), None
patent: 11-298541 (1999-10-01), None
patent: 2001-358786 (2001-12-01), None

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