Universal optical signal receiver

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

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Details

359194, 250214A, H04B 1006

Patent

active

059074221

ABSTRACT:
An optical receiver communication system converts optical signals modulated by analog or digital waveforms to RF signals. The optical receiver contains an automatic level control circuit to adjust the electronic gain of the system across a broad bandwidth spectrum. Two impedance matching circuits are designed using broad band matching technique to expand the bandwidth for increasing the maximum receivable frequencies to 1 GHz. A RLC impedance matching circuit forms a resonant combination to maintain .+-.1 dB fluctuation between the low-and-high-frequency limits of the bandwidth, and a 75.OMEGA. impedance matching circuit creates a 180.degree. phase shift between outgoing and incoming signals to ensure low return loss.

REFERENCES:
patent: 5347389 (1994-09-01), Skrobko
patent: 5477370 (1995-12-01), Little et al.
patent: 5745276 (1998-04-01), Ho et al.

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