Photo driver circuit with power saving function and method...

Details Photo driver circuit with power saving function and method... Photo driver circuit with power saving function and method...

2008-06-02

2009-08-11

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S2140RC

Reexamination Certificate

active

07573012

ABSTRACT:
The present invention discloses a photo driver circuit with power saving function and a corresponding method thereof. The photo driver circuit with power saving function comprises: a photo sensor device for sensing light and generating a corresponding photo current; a current amplifier amplifying the photo current; an output control circuit for generating a driver output signal according to the output of the current amplifier; and a power saving control circuit for activating a power saving mode in which the power saving control circuit outputs one or more control signals to shut down one or both of the current amplifier and the output control circuit.

REFERENCES:
patent: 7312780 (2007-12-01), Olson et al.

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