Switched-current biquad using differential, double-sampling, forward/backward difference integrators

Markus Helfenstein; Jari Pascal Curty; George S. Moschytz

doi:10.1109/ISCAS.2000.856430

Switched-current biquad using differential, double-sampling, forward/backward difference integrators

Markus Helfenstein, Jari Pascal Curty, George S. Moschytz

Swiss Federal Institute of Technology Zurich

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

1 Scopus citations

Abstract

A new switched-current integrator which accomplishes forward and backward difference integration and achieves double-sampling capabilities is described. The signal-flow graphs (SFGs) of several double-sampling integrators are derived and mapped into transistor circuits. Furthermore, as an example, a biquad based on an exact design and operating in differential and double-sampling mode is described and simulated. It is shown that the pole sensitivity of this biquad is reduced by a factor of 2 and the coefficient spread by a factor of 3 when compared with a bilinearly transformed reference filter.

Original language	English
Pages (from-to)	II-645-II-648
Journal	Proceedings - IEEE International Symposium on Circuits and Systems
Volume	2
DOIs	https://doi.org/10.1109/ISCAS.2000.856430
State	Published - 2000
Externally published	Yes

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AB - A new switched-current integrator which accomplishes forward and backward difference integration and achieves double-sampling capabilities is described. The signal-flow graphs (SFGs) of several double-sampling integrators are derived and mapped into transistor circuits. Furthermore, as an example, a biquad based on an exact design and operating in differential and double-sampling mode is described and simulated. It is shown that the pole sensitivity of this biquad is reduced by a factor of 2 and the coefficient spread by a factor of 3 when compared with a bilinearly transformed reference filter.

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Switched-current biquad using differential, double-sampling, forward/backward difference integrators

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