Carrier wave recovery system apparatus using synchronous detecti

Details Carrier wave recovery system apparatus using synchronous detecti Carrier wave recovery system apparatus using synchronous detecti

1977-09-30

1979-03-06

Martin, John C.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325420, 325346, 329124, 329112, H04B 116, H03D 302

Patent

active

041433220

ABSTRACT:
A carrier wave recovery apparatus of the decision feedback type having analog multipliers of lower dynamic range. The modulated signal is phase detected by comparison with a VCO signal. The analog multipliers receive a signal derived by subtraction of the phase detected signal from the same phase detected signal compared with a reference. That signal is multiplied in an analog multiplier by the phase detected signal or by the signal produced from comparing the phase detected signal with a reference.

REFERENCES:
patent: 4085378 (1978-04-01), Ryan et al.
patent: 4092606 (1978-05-01), Lovelace

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