Sampling circuit and image signal amplifying circuit each including feedback clamp block and image sensor including the image signal amplifying circuit
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United States of America Patent
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May 21, 2013
Grant Date -
Oct 20, 2011
app pub date -
Apr 14, 2011
filing date -
Apr 14, 2010
priority date (Note) -
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Abstract
A sampling circuit samples an input signal by using at least one switch, at least one capacitor, an amplifier, and a clamp block connected between an output terminal and a negative input terminal of the amplifier. The clamp block prevents a difference between a voltage level of the output terminal of the amplifier and a voltage level of the negative input terminal of the amplifier during sampling from exceeding a maximum voltage difference.
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