Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-04-22
1994-12-27
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250205, H01J 516
Patent
active
053767861
ABSTRACT:
An improved fiber optic delay line filter is disclosed having each fiber optic light path terminate on a corresponding photo detector adapted to convert the received optical signal to a commensurate electrical signal in bi-polar proportion to an electrical bias level provided to the photo detector where the bias level for each photo detector is independently settable and the outputs of all of the photodetectors are summed to produce an output electrical signal that is filtered by the arranged fiber optic delay line transversal filter.
REFERENCES:
patent: 4128759 (1978-12-01), Hunt et al.
patent: 4166212 (1979-08-01), Judeinstein
patent: 4686533 (1987-08-01), MacDonald et al.
patent: 4696059 (1987-09-01), MacDonald et al.
patent: 4976518 (1990-12-01), Burns
patent: 5235455 (1993-08-01), Berry et al.
Optoelectronic Transversal Filter by R. I. MacDonald et al Electronics Letters, vol. 27, No. 19, Sep. 12, 1991; pp. 1769-1770.
Photodetector sensitivity control for weight setting in optoelectronic neural networks by R. R. MacDonald et al Applied Optics, vol. 30, No. 2, Jan. 10, 1991; pp. 176-178.
Optoelectronic Switching by R. I. MacDonald IEEE Communications Magazine, vol. 25, No. 5, May 1987; pp. 33-36.
Le Que T.
Nelms David C.
Telecommunications Research Laboratories
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