Binary signal demodulator with comparative value decision circui

Details Binary signal demodulator with comparative value decision circui Binary signal demodulator with comparative value decision circui

1984-01-09

1985-08-13

Laroche, Eugene R.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329110, 375 82, 375 88, H03D 300

Patent

active

045352976

ABSTRACT:
An improved digital data demodulator, capable of properly detecting Manchester-encoded FSK received signals or chirped-frequency-modulated received signals, utilizes a multiplexer for switching the clock signals, to a pair of counters, from one of the mixing means receiving the input and phase-quadrature local reference signals, at a time essentially at the middle of each bit time interval expected for the incoming data signal, and is insensitive to time base jitter or other sources of timing error. In all embodiments, the transmission frequency and data bit rate are determined by externally-supplied reference frequencies, to allow a single demodulator to be utilized with a multiplicity of digital data signals having differing characteristics.

REFERENCES:
patent: 4475219 (1984-10-01), Puckette

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