Demodulation circuit having means for detecting phase difference

Details Demodulation circuit having means for detecting phase difference Demodulation circuit having means for detecting phase difference

1985-04-18

1987-03-17

LaRoche, Eugene R.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329112, 329122, 375 83, 375 85, 375 94, H03D 320

Patent

active

046511083

ABSTRACT:
A circuit for demodulating a modulated signal of date data or the like modulated by PSK or DPSK and recorded on a recording medium along with a still picture signal produced by an electronic still picture camera. The circuit generates a plurality of signals having the same frequency as the PSK or DPSK modulated signal and a predetermined phase difference with respect to each other and one of the signals having the minimum phase difference with respect to the modulated signal is selected thereby PSK or DPSK demodulating the modulated signal in accordance with the selected signal.

REFERENCES:
patent: 3729684 (1973-04-01), Shuda

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