A 5GHz transformer-coupled CMOS VCO using bias-level shifting technique

Taeksang Song, Sangsoo Ko, Dae Hyung Cho, Han Su Oh, Chulho Chung, Euisik Yoon

Research output: Contribution to conferencePaperpeer-review

23 Citations (Scopus)

Abstract

In this paper we report a low phase noise transformer-coupied CMOS VCO using bias-level shifting technique. Two fully integrated voltage-controlled oscillators (VCOs) are presented as a proof of concept. A conventional LC VCO with a current source achieves a phase noise of 116.67 dBc/Hz at 1 MHz offset from 5.6 GHz center frequency, taking 3.9 mA from 1.5 V power supply. The proposed transformer-coupled VCO achieves a phase noise of -124.17 dBe/Hz at 1 MHz offset from a 5.8 GHz carrier frequency with 5.1 mA bias current from 1.5 V power supply. The VCO performances are compared with the previously reported CMOS VCOs in the range of 4-6 GHz oscillation frequencies.

Original languageEnglish
Pages127-130
Number of pages4
Publication statusPublished - 2004
EventDigest of Papers - 2004 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium - Fort Worth, TX, United States
Duration: 2004 Jun 62004 Jun 8

Other

OtherDigest of Papers - 2004 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium
CountryUnited States
CityFort Worth, TX
Period04/6/604/6/8

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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