The use of high-speed op amps with low but precisely known dc gain allows the design of precise SC circuits with very high sampling frequency.The effect of the finite op amp dc gain is considered with proper capacitor design: no idle phase is required to compensate errors and double sampled structures can be implemented.The error due to deviations of the op amp gain from its nominal value is evaluated. An example of a second order cell is given.
Baschirotto, A., Castello, R., Montecchi, F. (1993). Exact design of high-frequency SC circuits with low-gain op amps. In Proceedings - IEEE International Symposium on Circuits and Systems (pp.1014-1017). IEEE [10.1109/ISCAS.1993.393896].
Exact design of high-frequency SC circuits with low-gain op amps
Baschirotto, A;
1993
Abstract
The use of high-speed op amps with low but precisely known dc gain allows the design of precise SC circuits with very high sampling frequency.The effect of the finite op amp dc gain is considered with proper capacitor design: no idle phase is required to compensate errors and double sampled structures can be implemented.The error due to deviations of the op amp gain from its nominal value is evaluated. An example of a second order cell is given.
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