发明名称 |
A/D converter and converting method having coarse comparison and fine comparison periods |
摘要 |
An improved serial-parallel type A/D converter is disclosed herein. A gate circuit 7 applies signals S11' to S14' provided from an encoder 3 only in a fine comparison period to switching circuits 11 to 14 as switching control signals S11 to S14. In the fine comparison period, one switching circuit is turned on, so that a fine comparison voltage is applied to voltage comparators 21 to 23. Since all of the switching circuits are turned off in a coarse comparison period, correct coarse comparison voltage is provided from a reference voltage generating circuit. As a result, a correct conversion in the coarse comparison period can be performed.
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申请公布号 |
US5349354(A) |
申请公布日期 |
1994.09.20 |
申请号 |
US19930029426 |
申请日期 |
1993.03.09 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
ITO, MASAO;HOSOTANI, SHIRO |
分类号 |
H03M1/14;H03M1/36;(IPC1-7):H03M1/14 |
主分类号 |
H03M1/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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