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A new architecture for rail-to-rail input constant-gm CMOS operational transconductance amplifiers

Ahmadi, M. M ; Sharif University of Technology | 2003

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  1. Type of Document: Article
  2. Publisher: 2003
  3. Abstract:
  4. A new architecture for constant-gm rail-to-rail(R-R) input stages is presented that has less than 5% deviation in gm over the entire range of the input common-mode voltage. Furthermore, a new structure for folded cascode amplifier based on the use of a floating current source is presented. Employing these techniques a low-power operational transconductance amplifier(OTA) with 100MHz unity-gain bandwidth, 106dB gain, 60° phase margin, 2.65V swing, and 6.4nVA/√Hz input-referred noise with R-R input common-mode range is realized in a 0.8μm CMOS technology. This amplifier dissipates 10mW from a 3V power supply
  5. Keywords:
  6. Current summation ; Floating current source ; Input stage ; Operational transconductance amplifier ; Rail-to-rail ; Transconductance
  7. Source: Proceedings of the 2003 International Symposium on Low Power Electronics and Design, (ISLPED'03), Seoul, 25 August 2003 through 27 August 2003 ; 2003 , Pages 353-358 ; 15334678 (ISSN)
  8. URL: https://dl.acm.org/doi/10.1145/871506.871594