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A high-frequency track-and-hold stage with offset and gain compensation

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3 Author(s)
G. C. Temes ; Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA ; Yunteng Huang ; P. F. Ferguson

A novel fully differential track-and-hold stage is proposed. The gain of the stage does not depend on capacitor matching, and it uses a predictive correlated-double-sampling scheme to reduce the effects of op-amp offset and finite dc gain. Due to these properties, it is well suited for the construction of a fully differential sample-and-hold stage using a ping-pong approach. Simulations indicate that the circuit is capable of high-speed and high-accuracy operation without requiring high-quality components

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IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing  (Volume:42 ,  Issue: 8 )