Demodulation correcting circuit for FSK receiver

Details Demodulation correcting circuit for FSK receiver Demodulation correcting circuit for FSK receiver

1995-08-21

1998-02-10

Chin, Stephen

Pulse or digital communications

Receivers

Angle modulation

375327, 375344, 329302, 4551922, 455264, H04L 2714

Patent

active

057177210

ABSTRACT:
A demodulation correcting circuit for an FSK signal receiver which include an AFC for correcting a reception frequency error to provide stabilized demodulation, said demodulation correcting circuit comprising subtracting circuit followed to a loop filter for eliminating or correcting a variation of the center frequency of the FSK modulation signal, which is caused by the fact that the AFC responds to low frequency components including DC of the FSK modulation signal and which brings about a decrease of noise margin.

REFERENCES:
patent: 3936753 (1976-02-01), Clark
patent: 4152650 (1979-05-01), Bennett, Jr.
patent: 4518922 (1985-05-01), Luecke
patent: 4827488 (1989-05-01), Shibano
patent: 5081652 (1992-01-01), Farahati et al.
patent: 5530723 (1996-06-01), Maplestone

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