Feedforward charge injection technique in a continuous time delta-sigma modulator

Awinash Anand, Daisuke Kanemoto, Ghazal A. Fahmy, Ramesh Pokharel, Haruichi Kanaya, Keiji Yoshida

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

Abstract

In this paper, we analyze the feedforward charge injection technique (FCIT) in a continuous time delta-sigma modulator (CTDSM) and explain the theory behind improvement of SNR. We find that the feedforward charge injection technique (FCIT) in a CTDSM significantly reduces the node voltage swing at the input of the operational transconductance amplifier (OTA) and thereby relaxes the design constraint on OTA by suppressing third harmonics and thus reduces power consumption significantly. We also observe that there exist three different regions of design with respect to the power consumption out of which only one region is critical with respect to power reduction and robust design. Combined with the regions of design FCIT enables to design robust CTDSM with low power consumption.

Original languageEnglish
Title of host publicationIEEE TENCON 2012: Sustainable Development Through Humanitarian Technology
DOIs
Publication statusPublished - 2012
Event2012 IEEE Region 10 Conference: Sustainable Development Through Humanitarian Technology, TENCON 2012 - Cebu, Philippines
Duration: Nov 19 2012Nov 22 2012

Other

Other2012 IEEE Region 10 Conference: Sustainable Development Through Humanitarian Technology, TENCON 2012
Country/TerritoryPhilippines
CityCebu
Period11/19/1211/22/12

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Science Applications

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