Variable noise control for an optical transducer

Details Variable noise control for an optical transducer Variable noise control for an optical transducer

2007-12-18

2007-12-18

Lee, John R. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140LS

Reexamination Certificate

active

10968564

ABSTRACT:
In one embodiment, an optical transducer, such as an infrared transducer, generates an output signal that is representative of optical irradiance. A noise control circuit is coupled in a power supply path of the optical transducer. A switching circuit varies the noise control provided by the noise control circuit, in response to changes in the output signal of the optical transducer. The noise control may be varied in a number of different ways, including: turning the noise control on or off, varying the noise control in discrete steps, or varying the noise control in a continuous manner. Methods for varying noise control in response to optical irradiance of an optical transducer are also disclosed.

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patent: 57026940 (1982-02-01), None
patent: 1126031 (1989-05-01), None

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