The following members are included: a light receiving element which outputs an electric signal corresponding to ambient light; an A/D converter which converts the electric signal output from the light receiving element into a digital signal; a register which stores the digital signal output from the A/D converter and determines the duty ratio of a PWM signal based on the digital signal; and a PWM controller which outputs the PWM signal based on the duty ratio output from the register.

 
Web www.patentalert.com

< Variable quantization ADC for image sensors

> A/D converter with noise cancel function

> Over-sampling A/D converting circuit

~ 00529