LIGHT TO PWM CONVERTER

Japanese Patent JP2005260954

A

To provide an optical/digital converter which has simple circuit configuration and whose cost is reduced.

With regard to conversion of light intensity to digital signal, the current output of a photodiode representing light intensity is converted to a voltage and provided as one input to a comparator. A sawtooth generator feeds the signal to the other input of the comparator. The output of the comparator is a pulse width modulated (PWM) digital signal where the pulse width is proportional to light intensity. The sawtooth generator can be synchronized to an external source.

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JAFFAR RIZAL
LEN-LI KEVIN LIM
LEE JOON CHOK

JP2005064004A

September 22, 2005

March 08, 2005

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AGILENT TECHNOLOGIES INC

H03K7/08; G01J1/44; G02F7/00; H01J40/14; H04B10/516; H04B10/524; H04B10/61; (IPC1-7): H04B10/04; H03K7/08; H04B10/06; H04B10/142; H04B10/152

Satoshi Furuya
Takahiko Mizobe
Kiyoharu Nishiyama

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