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ANALOG/DIGITAL CONVERTER AND METHOD FOR CONVERTING ANALOG SIGNALS TO DIGITAL SIGNALS

Foreign code F130007291
File No. EF001P01
Posted date Apr 11, 2013
Country WIPO
International application number 2012JP072786
International publication number WO 2013/042548
Date of international filing Sep 6, 2012
Date of international publication Mar 28, 2013
Priority data
  • P2011-207602 (Sep 22, 2011) JP
Title ANALOG/DIGITAL CONVERTER AND METHOD FOR CONVERTING ANALOG SIGNALS TO DIGITAL SIGNALS
Abstract

The objective of the invention is to provide an A/D converter that exhibits fewer malfunctions due to variations in manufacturing. An A/D converter (1) of the invention, which is a cyclic type of analog/digital converter for converting an analog input signal to a digital signal having a predetermined resolution, comprises: a digital approximation unit (10) that includes a comparing unit (13) for comparing the magnitude of an input first analog signal with a threshold value to output a digital value indicating a result of the comparison and that also includes an MDAC unit (14) for amplifying the first analog signal to beta-fold, where beta is greater than one but smaller than two, and for executing a predetermined computation in accordance with the result of the comparison of the comparing unit to output a second analog signal

a multiplexer (20) that, if the MSB is to be computed, outputs the analog input signal and, otherwise, outputs the second analog signal as the first analog signal

a beta estimating unit (30) that estimates the value of beta

and a digital signal outputting unit (40) that sequentially takes in digital values outputted by the comparing unit and that outputs the taken-in digital values as the digital signal.

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY,
  • SAN, HAO,
  • MARUYAMA, TSUBASA,
  • HOTTA, MASAO
  • Inventor
  • SAN, HAO,
  • MARUYAMA, TSUBASA,
  • HOTTA, MASAO
IPC(International Patent Classification)
Reference ( R and D project ) FIRST Mathematical Theory for Modeling Complex Systems and its Transdisciplinary Applications in Science and Technology AREA
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