Apparatus and methods for extracting two distinct frequency...

Details Apparatus and methods for extracting two distinct frequency... Apparatus and methods for extracting two distinct frequency...

H - Electricity

04

B

H04B 10/158 (2006.01) H03H 7/46 (2006.01)

Patent

CA 2384190

Methods and apparatus for extracting two distinct frequency bands from light received by a photodiode. Signals of a first frequency band such as, for example, less than about 3 MHz are recovered by circuitry connected to the cathode of the photodiode, and signals having a different frequency band such as, for example, between about 3 MHz to 50 MHz are recovered by circuitry connected to the anode of the photodiode.

Cette invention concerne des techniques et un dispositif permettant d'extraire deux bandes de fréquence distinctes de la lumière reçue par une photodiode. Selon qu'ils sont émis dans une première bande de fréquence, inférieure par exemple à environ 3 MHz, ou dans une autre bande de fréquence, comprise par exemple entre 3 MHz et 50 MHz environ, les signaux sont récupérés par des circuits différents reliés l'un à la cathode, l'autre à l'anode de la photodiode.

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