CID demodulator for DCT

Details CID demodulator for DCT CID demodulator for DCT

1995-12-07

1998-10-27

Chin, Stephen

Pulse or digital communications

Receivers

Angle modulation

329105, H03D 300, H04L 2722

Patent

active

058287086

ABSTRACT:
A system for demodulating a FSK digital signal comprising: first and second frequency detectors connected to detect the frequency of the digital signal, the first frequency detector producing an output signal whenever the digital signal is detected to have a first frequency and the second frequency detector producing an output signal whenever the digital signal is detected to have a second frequency; first and second low pass filters each having an input connected to receive the output signal produced by a respective frequency detector and an output for providing a smoothed version of the signal at the respective filter input; and signal combining circuitry connected to the outputs of the first and second filters for providing a demodulated output signal representing the FSK digital signal.

REFERENCES:
patent: 4568882 (1986-02-01), Single
patent: 4922490 (1990-05-01), Blakley
patent: 5155446 (1992-10-01), Eberle et al.
patent: 5434905 (1995-07-01), Maeda et al.
patent: 5513223 (1996-04-01), Shoji
patent: 5524028 (1996-06-01), Terada et al.

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