A 0.6-V delta-sigma modulator with subthreshold-leakage suppression switches

Hyungdong Roh, Hyong Joong Kim, Youngkil Choi, Jeongjin Roh, Yi Gyeong Kim, Jong Kee Kwon

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A 0.6-V 34-μW delta-sigma modulator implemented by using a standard 0.13-μm complementary metaloxidesemiconductor technology is presented. This brief analyzes a subthreshold-leakage current problem in switched-capacitor circuits and proposes subthreshold-leakage suppression switches to solve the problem. To verify the operation of the subthreshold-leakage suppression switches, two different fifth-order deltasigma modulators are implemented with conventional switches and new switches. The input feedforward architecture is used to reduce the voltage swings of the integrators. A high-performance low-quiescent amplifier architecture is developed for the modulator. The modulator, with new switches, achieves a dynamic range of 83 dB, a peak signal-to-noise ratio of 82 dB, and a peak signal-to-noise-plus-distortion ratio of 81 dB in a signal bandwidth of 20 kHz. The power consumption is 34 μWfor the modulator, and the core chip size is 0.33 mm2.

Original languageEnglish
Article number5299254
Pages (from-to)825-829
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume56
Issue number11
DOIs
Publication statusPublished - 2009 Nov 1
Externally publishedYes

Fingerprint

Modulators
Switches
Leakage currents
Signal to noise ratio
Electric power utilization
Capacitors
Bandwidth
Networks (circuits)
Electric potential

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

A 0.6-V delta-sigma modulator with subthreshold-leakage suppression switches. / Roh, Hyungdong; Kim, Hyong Joong; Choi, Youngkil; Roh, Jeongjin; Kim, Yi Gyeong; Kwon, Jong Kee.

In: IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 56, No. 11, 5299254, 01.11.2009, p. 825-829.

Research output: Contribution to journalArticle

Roh, Hyungdong ; Kim, Hyong Joong ; Choi, Youngkil ; Roh, Jeongjin ; Kim, Yi Gyeong ; Kwon, Jong Kee. / A 0.6-V delta-sigma modulator with subthreshold-leakage suppression switches. In: IEEE Transactions on Circuits and Systems II: Express Briefs. 2009 ; Vol. 56, No. 11. pp. 825-829.
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