Title :
Compensation of the influence of finite gain-bandwidth on continuous-time sigma-delta modulators
Author :
Ortmanns, Maurits ; Gerfers, F. ; Manoli, Eannos
Author_Institution :
Inst. of Microelectron., Albert-Ludwigs-Univ., Freiburg, Germany
Abstract :
This paper introduces a possible compensation for finite gain-bandwidth (GBW) induced errors in continuous-time Sigma-Delta modulators. Therefore a previously published model is used which reduces the effect of GBW to an integrator gain-error and feedback loop delays. Consequently, methods for the compensation of these errors are adopted with some modification. The results are confirmed analytically and by simulations and show a possible GBW reduction of about a decade compared to current designs.
Keywords :
circuit feedback; error compensation; modulators; sigma-delta modulation; continuous-time sigma-delta modulators; delay compensation; error compensation; feedback loop delays; feedback pulses; finite gain-bandwidth; integrator gain-error; sampling frequency; transfer function; Analytical models; Bandwidth; Delay effects; Delta-sigma modulation; Feedback; Frequency; Microelectronics; Operational amplifiers; Sampling methods; Transfer functions;
Conference_Titel :
Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on
Print_ISBN :
0-7803-8163-7
DOI :
10.1109/ICECS.2003.1301665
