发明授权
US5841388A A/D converter apparatus with frequency conversion function and radio
apparatus using the same
失效
具有变频功能的A / D转换装置及使用其的无线装置
- 专利标题： A/D converter apparatus with frequency conversion function and radio apparatus using the same
- 专利标题（中）： 具有变频功能的A / D转换装置及使用其的无线装置
-
申请号： US527638申请日： 1995-09-13
-
公开(公告)号： US5841388A公开(公告)日： 1998-11-24
- 发明人: Akira Yasuda , Tetsuro Itakura , Takafumi Yamaji
- 申请人： Akira Yasuda , Tetsuro Itakura , Takafumi Yamaji
- 申请人地址： JPX Kawasaki
- 专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX6-220643 19940914
- 主分类号： H03M3/04
- IPC分类号： H03M3/04 ; H03D7/00 ; H03D7/16 ; H03M3/02 ; H04B1/16 ; H04B1/26 ; H04B1/30 ; H04B14/06 ; H03M3/00
摘要：
An A/D converter apparatus comprising a negative feedback loop having a main signal line supplied with an input signal of a predetermined frequency and a feedback signal line passing through a feedback signal, a A/D converter connected to the main signal line for frequency-converting the input signal to a signal having a frequency different from that of the input signal to output a converted signal, a D/A converter connected to the feedback signal line for frequency-converting the feedback signal to a signal having a frequency substantially equal to that of the input signal, and a subtracter for subtracting the feedback signal from the D/A converter from the input signal to supply a subtraction result signal to the A/D converter.