A fast settling, high DC gain, low power OPAMP design for high resolution, high speed A/D converters

D. Shahrjerdi, B. Hekmatshoar, M. Talaie, O. Shoaei

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A fast settling, low power, high dynamic range OPAMP with a DC gain of 96 dB has been designed. Simulations have been performed in 0.35 μm CMOS technology for slow, nominal and fast models. High DC gain has been achieved by adding gain boosting active blocks to the main OPAMP. In this design, a telescopic OTA has been chosen as the main opamp due to its fast settling and low power advantages, as well as the gain boosting OPAMPs. Transient simulation indicates a settling time of 17ns for a global feedback with β= 1/2. Although telescopic OPAMPs suffer from inherent low output voltage swing, a dynamic range of 83 dB has been achieved in this design. A power consumption of 4.1 mW is obtained for the total circuit including the main OPAMP, gain boosters and the bias circuitry.

Original languageEnglish (US)
Title of host publicationProceedings of the 15th International Conference on Microelectronics, ICM 2003
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages207-210
Number of pages4
ISBN (Electronic)9770520101
DOIs
StatePublished - Jan 1 2003
Event15th International Conference on Microelectronics, ICM 2003 - Cairo, Egypt
Duration: Dec 9 2003Dec 11 2003

Publication series

NameProceedings of the International Conference on Microelectronics, ICM
Volume2003-January

Other

Other15th International Conference on Microelectronics, ICM 2003
CountryEgypt
CityCairo
Period12/9/0312/11/03

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Keywords

  • Boosting
  • CMOS technology
  • Circuit simulation
  • Dynamic range
  • Feedback
  • Gain
  • Low voltage
  • Optical design
  • Semiconductor device modeling
  • Space technology

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Shahrjerdi, D., Hekmatshoar, B., Talaie, M., & Shoaei, O. (2003). A fast settling, high DC gain, low power OPAMP design for high resolution, high speed A/D converters. In Proceedings of the 15th International Conference on Microelectronics, ICM 2003 (pp. 207-210). [1287771] (Proceedings of the International Conference on Microelectronics, ICM; Vol. 2003-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICM.2003.238614