Noise performance of the correlated double sampling switched-capacitor integrators incorporating a supplementary hold capacitor is analyzed. These types of integrators rely on an extra capacitor to attenuate the amplifier low-frequency noise. Approximate expressions for the input-referred noise of the integrators are derived. It is shown that a large parasitic capacitance at the amplifier input may seriously degrade the low-frequency noise performance of such structures.
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O. Oliaei (2003) studied this question.
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