Signal discriminator

Details Signal discriminator Signal discriminator

H - Electricity

04

B

343/19, 343/4, 3

H04B 10/06 (2006.01) G01J 1/44 (2006.01) G01S 7/487 (2006.01) G01S 17/74 (2006.01) G06K 7/10 (2006.01) G07C 9/00 (2006.01) H04B 1/59 (2006.01) H04J 14/00 (2006.01)

Patent

CA 1316582

ABSTRACT OF THE DISCLOSURE A discriminating apparatus for discriminating a radiant information signal from a background signal, the discriminating apparatus including a radiation sensing means sensitive to an incident signal comprising both an information signal and a background signal and operative to generate an output sensing signal of a level related to the level of the incident signal, and detector means responsive to the sensing signal to detect an information signal component of the sensing signal from a background signal level component of the sensing signal. The discriminating apparatus is characterised in that the detector means comprises a circuit section, particularly a semiconductor element, which is maintained in an operating region where a superimposed information component of the sensing signal resulting from reception by the radiation sensing means of the information signal produces a substantial magnitude detector signal regardless of the level of the background component of the sensing signal resulting from incident background radiation so as to thereby maintain the discrimination of the information signal component of the sensing signal.

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