FSK frequency discriminator for a coherent optical transmission

Details FSK frequency discriminator for a coherent optical transmission FSK frequency discriminator for a coherent optical transmission

1987-11-20

1989-03-21

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329116, 329204, 375 91, H04L 2714

Patent

active

048147176

ABSTRACT:
A frequency discriminator for an optical coherent transmission system, wherein FSK signals having the frequencies F(1) and F(2) are processed. The discriminator comprises a first series arrangement of a differential stage, a filter and a full-wave rectifier for processing the signal having the frequency F(1) and a second series arrangement of a differential stage, a filter and a full-wave rectifier for processing the signal having the frequency F(2). The discriminator is extremely fit for use at frequencies >1 GHz and it is easy to integrate.

REFERENCES:
patent: 3223929 (1965-12-01), Hofstad et al.
patent: 3417336 (1968-12-01), Cribbs et al.
patent: 4694260 (1987-09-01), Argintaru et al.

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