Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1987-03-23
1989-02-14
Grimm, Siegfried H.
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
329105, 329110, 375 84, H04L 2722
Patent
active
048049255
ABSTRACT:
A data signal is modulated by an exclusive-OR operation applied to a carrier signal and a data signal to be recorded. Demodulation is similarly performed by an exclusive-OR operation applied to the carrier signal and signal indicative of read data. This makes it possible to construct the modulating/demodulating circuit in the form of a digital circuit.
REFERENCES:
patent: 3525945 (1970-08-01), Puente
patent: 3970945 (1976-07-01), Knapp
patent: 4052558 (1977-10-01), Patterson
patent: 4344175 (1982-08-01), Leslie
patent: 4577241 (1986-03-01), Wilkinson
Iwase Yoshiki
Kaneko Kiyotaka
Miyake Izumi
Nakadai Katsuo
Oda Kazuya
Fuji Photo Film Co. , Ltd.
Grimm Siegfried H.
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