Slew rate induced distortion in switched-resistor integrators

Jiraseree-amornkun, A.; Worapishet, A.; Klumperink, E. A.M.; Nauta, B.; Surakampontorn, W.

Slew rate induced distortion in switched-resistor integrators

Author(s)

Jiraseree-amornkun, A.

Worapishet, A.

Klumperink, E. A.M.

Nauta, B.

Surakampontorn, W.

Date Issued

December 1, 2006

Type

Conference Paper

Abstract

OPAMP-RC integrators built with linear resistors and capacitors can achieve very high linearity. By means of a switched resistor, tuning of the RC time-constant is possible via the duty-cycle of the clock controlling the switched resistor. This paper analyzes the effect of OPAMP slew rate limitations on the distortion of a switched-resistor lossy OPAMP-RC integrator. We show via analysis and simulations that the use of two sets of switched resistors instead of one relaxes the OPAMP slew rate requirements, and reduces the resulting distortion significantly. ©2006 IEEE.

Citation

Proceedings IEEE International Symposium on Circuits and Systems, 2485-2488, 2006