An optimized sigma-delta fractional-N frequency synthesizer for monolithic CMOS UHF RFID reader

Runxi Zhang*, Wei He, Chunqi Shi, Zongsheng Lai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A novel 3rd-order 3-bit single-loop sigma-delta fractional-N frequency synthesizer optimized for monolithic UHF RFID reader is fabricated in 0.18 μm CMOS technology. The phase noise requirements are recapitulated based on the proposed zero-IF architecture and EPCglobal C1G2 and ETSI RFID protocols. The measurement results show that the frequency synthesizer achieves noise suppression for additional zero configuration in noise transfer function of modulator. The measured phase noise is approximately-103 and-132 dBc/Hz at 200 kHz and 1 MHz offsets from 900 MHz center frequency while drawing 9.6 mA from 1.8 V power supply.

Original languageEnglish
Pages (from-to)251-255
Number of pages5
JournalGuti Dianzixue Yanjiu Yu Jinzhan/Research and Progress of Solid State Electronics
Volume30
Issue number2
StatePublished - Jun 2010

Keywords

  • Fractional-N
  • Frequency synthesizer
  • Reader
  • UHF RFID

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