Title:
A/D変換装置
Document Type and Number:
Japanese Patent JP4140528
Kind Code:
B2
Abstract:
In an A/D conversion device, one level shift circuit shifts an input voltage to the low potential side by Vt 1 , and another level shift circuit shifts the input voltage to the high potential side by Vt 2 . A multiplexer selects either of the shifted voltages to an A/D converter. In a correction mode, a correction data holding circuit holds values of reference voltages that are also A/D converted after being passed through the one level shift circuit and values of reference voltages that are A/D converted by being passed through the other level shift circuit, as correction values. A correction control circuit corrects the A/D converted value using the correction values.
Inventors:
Takuya Harada
Application Number:
JP2004023300A
Publication Date:
August 27, 2008
Filing Date:
January 30, 2004
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H03M1/12; H03M1/06; H03M1/18; H03M1/34
Domestic Patent References:
| JP7095074A | ||||
| JP6224761A | ||||
| JP8330962A |
Attorney, Agent or Firm:
Tsuyoshi Sato
Kiyoshi Ogawa
Kiyoshi Ogawa