发明名称 |
Captured-image-signal processing method and apparatus and imaging apparatus |
摘要 |
An imaging apparatus includes a solid-state imaging device that outputs a captured image signal in current mode, which in turn is subjected to CDS processing in current mode by a current signal detector, thus suppressing FPN noise. A captured image signal output by the current signal detector is amplified by a programmable gain amplifier to a certain level, and the amplified signal is converted by a current-to-voltage transducer into a voltage signal. In a clamp circuit including a current-output differential amplifier and a current adder, the differential amplifier compares the voltage signal with a reference voltage from a reference voltage source and feeds back a clamp current to the current adder so that the difference between the voltage signal and the reference voltage becomes substantially zero. The current adder is required to simply add a signal current and the clamp current.
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申请公布号 |
US2004027471(A1) |
申请公布日期 |
2004.02.12 |
申请号 |
US20030446658 |
申请日期 |
2003.05.29 |
申请人 |
KOSEKI KEN;HARUTA TSUTOMU;HISAMATSU YASUAKI;YASUI YUKIHIRO |
发明人 |
KOSEKI KEN;HARUTA TSUTOMU;HISAMATSU YASUAKI;YASUI YUKIHIRO |
分类号 |
H04N5/18;H04N5/335;H04N5/361;H04N5/365;H04N5/369;H04N5/374;H04N5/378;(IPC1-7):H04N5/335 |
主分类号 |
H04N5/18 |
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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