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

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

Yonsei Advanced Science Institute

Research output: Contribution to conference › Paper › peer-review

24 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 language	English
Pages	127-130
Number of pages	4
Publication status	Published - 2004
Event	Digest of Papers - 2004 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium - Fort Worth, TX, United States Duration: 2004 Jun 6 → 2004 Jun 8

Other

Other	Digest of Papers - 2004 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium
Country/Territory	United States
City	Fort Worth, TX
Period	04/6/6 → 04/6/8

All Science Journal Classification (ASJC) codes

Engineering(all)

Cite this

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title = "A 5GHz transformer-coupled CMOS VCO using bias-level shifting technique",

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.",

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AU - Song, Taeksang

AU - Ko, Sangsoo

AU - Cho, Dae Hyung

AU - Oh, Han Su

AU - Chung, Chulho

AU - Yoon, Euisik

PY - 2004

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N2 - 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.

AB - 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.

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

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