A 2.4, 5.2, and 5.7 GHz CMFB Gilbert downconverter with low-voltage cascode current mirror input stage

Sheng Che Tseng*, Chin-Chun Meng, Guo Wei Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A triple-band (2.4, 5.2, and 5.7 GHz) CMFB downconversion micromixer with a low-voltage cascade current mirror RF input stage has been demonstrated by the 0.18-μm CMOS technology in this letter. Micromixer has a single-ended RF input stage, the CMFB topology is adopted to improve the conversion gain, and a differential-to-single output buffer is used to convert the differential output of the mixer into a single-ended output. The fully integrated downconversion micromixer has the conversion gain of 12 dB, LO-to-IF isolation of 43 dB, LO-to-RF isolation of 48 dB, and RF-to-IF isolation of 18 dB at 2.4 GHz. The mixer has the conversion gain of 7.5 dB, LO-to-IF isolation of 54 dB, LO-to-RF isolation of 49.5 dB, and RF-to-IF isolation of 25 dB at 5.7 GHz. The total quiescent current consumption of the circuit is 7.6 mA.

Original languageEnglish
Pages (from-to)2345-2349
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume48
Issue number11
DOIs
StatePublished - 1 Nov 2006

Keywords

  • CMFB
  • Downconverter
  • Gilbert mixer
  • Micromixer
  • RFIC

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