On the Frequency Limitations of SC Filters

Godi Fischer; George S. Moschytz

doi:10.1109/jssc.1984.1052175

On the Frequency Limitations of SC Filters

Godi Fischer, George S. Moschytz

Swiss Federal Institute of Technology Zurich

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Representative closed-form expressions are derived for a stray-insensitive integrator which describe the combined influence of the amplifier finite gain and finite bandwidth and of the nonzero on-resistance of the switches. In this way, a technology-dependent upper frequency limit is obtained for the application of typical stray-insensitive SC circuits. The deteriorating effect of switch-on resistance and stray capacitance is also derived for integrator circuits comprising unity-gain amplifiers. However, the results obtained show that they are too much affected by the parasitic capacitances to be a serious alternative for monolithic high precision filters.

Original language	English
Pages (from-to)	510-518
Number of pages	9
Journal	IEEE Journal of Solid-State Circuits
Volume	19
Issue number	4
DOIs	https://doi.org/10.1109/jssc.1984.1052175
State	Published - Aug 1984
Externally published	Yes

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AB - Representative closed-form expressions are derived for a stray-insensitive integrator which describe the combined influence of the amplifier finite gain and finite bandwidth and of the nonzero on-resistance of the switches. In this way, a technology-dependent upper frequency limit is obtained for the application of typical stray-insensitive SC circuits. The deteriorating effect of switch-on resistance and stray capacitance is also derived for integrator circuits comprising unity-gain amplifiers. However, the results obtained show that they are too much affected by the parasitic capacitances to be a serious alternative for monolithic high precision filters.

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On the Frequency Limitations of SC Filters

Abstract

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