Solid-state imaging device

Abstract

A solid-state imaging device includes a plurality of pixels, which convert light into signal voltages, and a plurality of analog-digital (AD) converters, which convert the signal voltages into a plurality of digital signals. Each of the plurality of AD converters includes an analog circuit, which receives a same power as a power of the plurality of pixels, and a digital circuit, which receives power having a voltage lower than a voltage of the analog circuit. The solid-state imaging device further includes a controller configured to suspend supplying the same power to the analog circuit, which is included in one of the plurality of AD converters that has finished a conversion.

1 . A solid-state imaging device, comprising:
 a plurality of pixels, which convert light into signal voltages; and   a plurality of analog-digital (AD) converters, which convert the signal voltages into a plurality of digital signals,   wherein each of the plurality of AD converters includes:
 an analog circuit, which receives a same power as a power of the plurality of pixels; and 
 a digital circuit, which receives power having a voltage lower than a voltage of the analog circuit, and 
   the solid-state imaging device further comprises   a controller configured to suspend supplying the same power to the analog circuit, which is included in one of the plurality of AD converters that has finished a conversion.   
     
     
         2 . The solid-state imaging device according to  claim 1 ,
 wherein the analog circuit includes a comparator, which generates an output signal indicating a greater voltage of the signal voltage and a reference voltage, and   the digital circuit includes a counter, which counts a count value to measure an elapsed time until logic of the output signal is inverted.   
     
     
         3 . A digital camera, comprising the solid-state imaging device according to  claim 1 .