Design of a 7-bit 1GSPS folding-interpolaion A/D converter with self-calibration technique

  • Younghoon Kim
  • , Jungwon Jeon
  • , Kyuik Cho
  • , Daeyun Kim
  • , Joonho Moon
  • , Minkyu Song

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, a 65nm 1.2V 7-bit 1GSPS A/D converter with a self-calibration technique is proposed. The A/D converter is based on a folding-interpolation structure whose folding rate is 2, interpolation rate is 8. An offset self-calibration circuit with a feedback loop and a recursive digital code inspection is described. The offset self-calibration circuit reduces the variation of the offset voltage, due to process mismatches, parasitic resistors, and parasitic capacitances. The chip has been fabricated with a 65nm 1-poly 6-metal CMOS technology. The effective chip area is 0.87mm2 and the power consumption is about 110mW with a 1.2V power supply. The measured SNDR is about 38.48dB when the input frequency is 250MHz at 1GHz sampling frequency. The measured SNDR is 3dB higher than the same ADC without any calibration.

Original languageEnglish
Title of host publication2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010 - Proceedings
Pages110-113
Number of pages4
DOIs
StatePublished - 2010
Event2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010 - Athens, Greece
Duration: 12 Dec 201015 Dec 2010

Publication series

Name2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010 - Proceedings

Conference

Conference2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010
Country/TerritoryGreece
CityAthens
Period12/12/1015/12/10

Keywords

  • 7bit
  • ADC
  • Folding
  • Interpolation
  • Self-Calibration

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