发明名称 |
IMPROVEMENTS IN ANALOG TO DIGITAL CONVERTERS |
摘要 |
An analog to digital converter apparatus arranged to convert a plurality C (=4) of different input signals to digital representations thereof. The apparatus comprises a multiplexer arranged sequentially to couple each of the 4 input signals to a fast a-to-d converter (such as a successive approximations converter) at a rate such that each input signal is coupled N (=8) times in a period M (=20 m secs) of an a.c. series mode interfering signal (at 50 Hz) and at equal time intervals M/N (20/8=2.5 m secs). The N (=8) digital values of each input signal are averaged to provide at the end of a conversion period a digital value for each of the 4 input signals (C) which is the mean magnitude of the signal during the 20 m sec period (M). |
申请公布号 |
EP0098744(A3) |
申请公布日期 |
1985.09.18 |
申请号 |
EP19830303814 |
申请日期 |
1983.06.30 |
申请人 |
BELL & HOWELL LIMITED |
发明人 |
WHEABLE, DESMOND;ATTWOOD, MICHAEL JOHN |
分类号 |
H03M1/00 |
主分类号 |
H03M1/00 |
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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