Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1981-02-27
1984-03-06
Britton, Howard W.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455608, G02B 514
Patent
active
044358490
ABSTRACT:
An optical information-bearing signal is regenerated by branching a portion off that signal while the remaining portion permanently bypasses the regeneration. The branched-off portion is converted into an electrical signal which is processed to regenerate, at a higher power level, the information in a manner which is dynamically invariant to a wide range of input level changes. The regenerated signal is superimposed upon the passed-through signal. A three-signal level encoding scheme is employed and the regeneration involves referencing the branched-off portion electrically against two thresholds in a manner which maintains a constant amplitude relation between the thresholds and the arithmetic average of the electrical signal representing the branched-off portion. The regenerating units are used in series and designed so that two or more in a row can drop out and still the signal can be regenerated by the next operational regeneration.
REFERENCES:
patent: 4166946 (1979-09-01), Chown et al.
patent: 4236256 (1980-11-01), Brackett et al.
Barth Utz W.
Ilgner Herwig
Britton Howard W.
Coles Edward L.
Hartmann & Braun AG
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