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INTEGRAL A/D CONVERTER AND CMOS IMAGE SENSOR meetings

Foreign code F130007680
File No. S2012-0418-N0
Posted date Oct 17, 2013
Country WIPO
International application number 2013JP053734
International publication number WO 2013/122221
Date of international filing Feb 15, 2013
Date of international publication Aug 22, 2013
Priority data
  • P2012-033196 (Feb 17, 2012) JP
Title INTEGRAL A/D CONVERTER AND CMOS IMAGE SENSOR meetings
Abstract

Provided is an integral A/D converter in which power consumption can be kept down while the conversion accuracy and conversion speed are improved. This integral A/D conversion circuit (1) is provided with: a comparator (10) for comparing the input voltage and the reference voltage of a ramp waveform, and outputting a comparison signal

a DLL (50) for generating a plurality of clock signals including a main clock signal and a clock signal having a different phase

a delay adjustment circuit (20) for delaying the comparison signal by a length equal to or greater than one cycle of the main clock signal

a counter (30) for calculating the time from the start of ramp waveform change to inversion of the output of the comparator on the basis of the output signal from the delay adjustment circuit (20) and the main clock signal, and outputting the time as a high-order bit

and a TDC (40) for latching, decoding, and outputting as a low-order bit the plurality of clock signals generated by the DLL (50) when the output of the delay adjustment circuit (20) is inverted

the TDC (40) starting operation by inversion of the comparison signal, and to stopping operation by inversion of the output signal from the delay adjustment circuit (20).

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
  • Inventor
  • IKEBE MASAYUKI
IPC(International Patent Classification)
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