发明名称 |
Circuit for digitally processing exposure information |
摘要 |
A circuit system designed to realize fully digitalized automatic exposure controls is provided in which the read-in brightness information is logarithmically compressed directly into a digital quantity without the aid of any diode element that exhibits a logarithmic characteristic. This enables full utilization of the merits of digitalization while affording further advantages including increased stability against temperature and voltage variations.
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申请公布号 |
US4184151(A) |
申请公布日期 |
1980.01.15 |
申请号 |
US19770774172 |
申请日期 |
1977.03.03 |
申请人 |
NIPPON ELECTRIC CO LTD |
发明人 |
IWATA, SHIGEHISA |
分类号 |
G01R19/25;G01R19/255;G03B7/091;H03M1/18;H03M1/56;(IPC1-7):H03K13/20 |
主分类号 |
G01R19/25 |
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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