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US 4,793,000 AGranted
Light signal receiver
AssigneeCanon Kabushiki Kaisha
InventorsHaruo Imano, Izumi Ichikawa, Satoshi Ogiwara, Genmei Miura
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Abstract
A light signal receiver comprises a photo-sensing element for sensing a modulated light signal, conversion means for converting the light signal sensed by the photosensing element to an electrical signal, and resonance means having a filter element or resonator connected in parallel with a load resistor of the photo-sensing element.
Claims7
A light signal receiver for detecting information carried on a modulated light signal, said receiver comprising:
- light-sensitive receiving means for receiving the modulated light signal;
- converting means for converting the light signal received by said receiving means to an electrical signal;
- and
- resonance means connected to said receiving means and said converting means, for providing a resonant frequency in said receiver, said resonance means having a mechanical vibration element whose resonant frequency is tuned to a modulation frequency of the received signal, thereby to improve detection of the information carried on the modulated light signal.
1 more element
A light signal receiver comprising:
- a photo-sensing element for sensing a modulated light signal;
- conversion means for converting the light signal sensed by said photo-sensing element to an electrical signal;
- and
- resonance means having a filter element connected in parallel with a load resistor of said photo-sensing element.
1 more element
A light signal receiver comprising:
- a photo-sensing element for sensing a modulated light signal;
- conversion means for converting the light signal sensed by said photo-sensing element to an electrical signal;
- and
- resonance means having a resonator connected in parallel with a load resistor of said photo-sensing element.
1 more element
Dependencies are inferred from the claim text.