| 摘要 |
PROBLEM TO BE SOLVED: To provide a correlated double sampling(CDS) circuit, a pixel signal gain amplifier circuit (PxGA) circuit and a CDS/PxGA circuit where a gain setting value of an amplifier circuit can be changed for each sampling. SOLUTION: The CDS/PxGA circuit is provided with a main amplifier 800, an input sampling capacitor 802 and a feedback capacitor 804. The input sampling capacitor 802 samples an input signal for a 1st period, and the feedback capacitor 804 samples the sampled input as above for a 2nd period. No sampling switch is provided between the input sampling capacitor 802 and an input terminal of the main amplifier 800. The feedback capacitor 804 may be made up of a capacitor array.
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