A low power sigma-delta modulator using class-C inverter

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

29 Citations (Scopus)


In switched capacitor sigma-delta (ΣΔ) analog-to-digital converters (ADCs), an operational transconductance amplifier (OTA) is the main building block and consumes most of power. This paper proposes that the OTAs can be replaced with class-C inverters for low-power consumption without sacrificing the performance. A second order ΣΔ modulator using class-C inverter technique is fabricated with a 0.35-μm CMOS process, occupies 3024 m2, dissipates 5.6-μW under 1.2V supply-voltage, and provides 63-dB/72-dB/76-dB SNDR/SNR/DR over 8-kHz signal bandwidth.

Original languageEnglish
Title of host publication2007 Symposium on VLSI Circuits, VLSIC - Digest of Technical Papers
Number of pages2
Publication statusPublished - 2007
Event2007 Symposium on VLSI Circuits, VLSIC - Kyoto, Japan
Duration: 2007 Jun 142007 Jun 16

Publication series

NameIEEE Symposium on VLSI Circuits, Digest of Technical Papers


Other2007 Symposium on VLSI Circuits, VLSIC

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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