Top > Search of International Patents > A/D CONVERTER, IMAGE SENSOR DEVICE, AND METHOD OF GENERATING DIGITAL SIGNAL FROM ANALOG SIGNAL

A/D CONVERTER, IMAGE SENSOR DEVICE, AND METHOD OF GENERATING DIGITAL SIGNAL FROM ANALOG SIGNAL

Foreign code F120006839
File No. S2011-0416
Posted date Sep 5, 2012
Country WIPO
International application number 2012JP053868
International publication number WO 2012/111821
Date of international filing Feb 17, 2012
Date of international publication Aug 23, 2012
Priority data
  • P2011-033718 (Feb 18, 2011) JP
Title A/D CONVERTER, IMAGE SENSOR DEVICE, AND METHOD OF GENERATING DIGITAL SIGNAL FROM ANALOG SIGNAL
Abstract

The objective of the present invention is to attain an A/D converter that executes integration type A/D conversion, and cyclic type A/D conversion for the residual analog signal thereof, with a single-ended configuration. According to this A/D converter, a first A/D conversion operation for executing the integrating type A/D conversion, and a second A/D conversion operation for executing the cyclic type A/D conversion are attained by controlling the operation procedure of the same circuit configuration. Further, since, in the first A/D conversion operation, the capacity of a capacitor to be used for integrating the output signal is larger than the capacity of a capacitor to be used for storing an input analog signal and a reference voltage, an analog signal to be inputted for the integration type A/D conversion is attenuated according to the capacity ratio of the capacitors, before being sampled and integrated. Since the voltage range of the analog signal to be outputted in the integration type A/D conversion will become smaller according to the capacity ratio of the capacitors, an A/D converter can be configured with a single-ended configuration.

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITY,
  • KAWAHITO SHOJI
  • Inventor
  • KAWAHITO SHOJI
IPC(International Patent Classification)
Please contact us by E-mail or facsimile if you have any interests on this patent.

PAGE TOP

close
close
close
close
close
close