发明名称 |
Light source frequency detection circuit for image sensor |
摘要 |
An apparatus for measuring the power frequency of a light source includes a photo-sensor, a modulator, and a logic unit. The photo-sensor generates an electrical signal that is responsive to light incident thereon from the light source. The modulator generates a modulated signal based on the electrical signal that toggles at a rate substantially proportional to the power frequency of the light source. The logic unit is coupled to receive the modulated signal and determine its toggling frequency.
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申请公布号 |
US2009072126(A1) |
申请公布日期 |
2009.03.19 |
申请号 |
US20070901212 |
申请日期 |
2007.09.14 |
申请人 |
DAI TIEJUN;ZHANG JINGZHOU;DENG LIPING |
发明人 |
DAI TIEJUN;ZHANG JINGZHOU;DENG LIPING |
分类号 |
G01R23/02;G01J1/44 |
主分类号 |
G01R23/02 |
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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