Compensation of finite gain-bandwidth induced errors in continuous-time sigma-delta modulators

Compensation of finite gain-bandwidth induced errors in continuous-time sigma-delta modulators

This paper introduces a possible compensation for finite gain-bandwidth (GBW) induced errors in continuous-time sigma-delta modulators. Therefore, a novel model is derived which reduces the effect of a finite GBW to a corresponding integrator gain-error and feedback loop delays. Thus, previously pub...

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Veröffentlicht in:IEEE transactions on circuits and systems. 1, Fundamental theory and applications Fundamental theory and applications, 2004-06, Vol.51 (6), p.1088-1099
Hauptverfasser: Ortmanns, M., Gerfers, F., Manoli, Y.
Format: Artikel
Sprache:eng
Schlagworte:
Analytical models
Bandwidth
Circuits
Compensation
Delay
Delay effects
Design engineering
Errors
Feedback loop
Feedback loops
Filters
Frequency
Mathematical analysis
Modulators
Operational amplifiers
Sampling methods
Semiconductor device noise
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Beschreibung
Zusammenfassung:This paper introduces a possible compensation for finite gain-bandwidth (GBW) induced errors in continuous-time sigma-delta modulators. Therefore, a novel model is derived which reduces the effect of a finite GBW to a corresponding integrator gain-error and feedback loop delays. Thus, previously published methods for the compensation of these errors can be adopted with some modification. The results are confirmed analytically and by simulations and show a possible GBW reduction of about one order of magnitude compared to current designs.
ISSN:1549-8328
1057-7122
1558-0806
DOI:10.1109/TCSI.2004.829234