发明申请
- 专利标题: Analog front-end circuit and electronic instrument
- 专利标题(中): 模拟前端电路和电子仪器
-
申请号: US12072329申请日: 2008-02-26
-
公开(公告)号: US20080204297A1公开(公告)日: 2008-08-28
- 发明人: Masahiko Mizuta
- 申请人: Masahiko Mizuta
- 专利权人: Seiko Epson Corporation
- 当前专利权人: Seiko Epson Corporation
- 优先权: JP2007-046943 20070227
- 主分类号: H03M1/12
- IPC分类号: H03M1/12
摘要:
An analog front-end circuit includes an analog processing circuit, an A/D converter, a target register in which a lower limit target value of an input image signal is set, and a calculation circuit. The analog processing circuit includes an offset control circuit which performs offset control based on an offset control value set in an offset control register. The calculation circuit monitors the A/D-converted value in a lower limit value output period when the A/D-converted value corresponding to a lower limit value of an input range is output from the AID converter, and sets the offset control value that causes the A/D-converted value to become closer to the lower limit target value set in the target register in the offset control register.
公开/授权文献
- US07746252B2 Analog front-end circuit and electronic instrument 公开/授权日:2010-06-29