Abstract

Systematic design of low-dropout-regulator (LDO) regulated low-phase-noise LC-tank voltage controlled oscillators (VCOs) is presented. Low-frequency sensitivity profile of power supply induced phase noise of a typical cross-coupled LC-tank VCO is investigated. The relationship between frequency pushing and power supply-induced phase noise is derived. Systematic codesign of VCO sensitivity to low-frequency supply noise with respect to an LDO output noise and power supply rejection profile is introduced. To demonstrate the design approach experimentally, two 2.4-GHz LC-tank VCOs with pMOS and nMOS switching devices powered by PFET LDOs are designed and fabricated on an 0.18-μm, 7-layer metal CMOS process. By using an integrated LDO, it is shown that the VCO phase-noise sensitivity to low frequency improves by 55 dB at 100-kHz offset.

Original languageEnglish (US)
Pages (from-to)1834-1844
Number of pages11
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume55
Issue number7
DOIs
StatePublished - Aug 2008

Fingerprint

Variable frequency oscillators
Phase noise
Metals

Keywords

  • DC-DC power conversion
  • Phase noise
  • Power supply rejection (PSR)
  • Voltage regulators
  • Voltage-controlled oscillators (VCOs)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Systematic design of supply regulated LC-tank voltage-controlled oscillators. / Wang, Xuejin; Bakkaloglu, Bertan.

In: IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 55, No. 7, 08.2008, p. 1834-1844.

Research output: Contribution to journalArticle

@article{6f296b292b324985866289cf3d70c9e8,
title = "Systematic design of supply regulated LC-tank voltage-controlled oscillators",
abstract = "Systematic design of low-dropout-regulator (LDO) regulated low-phase-noise LC-tank voltage controlled oscillators (VCOs) is presented. Low-frequency sensitivity profile of power supply induced phase noise of a typical cross-coupled LC-tank VCO is investigated. The relationship between frequency pushing and power supply-induced phase noise is derived. Systematic codesign of VCO sensitivity to low-frequency supply noise with respect to an LDO output noise and power supply rejection profile is introduced. To demonstrate the design approach experimentally, two 2.4-GHz LC-tank VCOs with pMOS and nMOS switching devices powered by PFET LDOs are designed and fabricated on an 0.18-μm, 7-layer metal CMOS process. By using an integrated LDO, it is shown that the VCO phase-noise sensitivity to low frequency improves by 55 dB at 100-kHz offset.",
keywords = "DC-DC power conversion, Phase noise, Power supply rejection (PSR), Voltage regulators, Voltage-controlled oscillators (VCOs)",
author = "Xuejin Wang and Bertan Bakkaloglu",
year = "2008",
month = "8",
doi = "10.1109/TCSI.2008.918004",
language = "English (US)",
volume = "55",
pages = "1834--1844",
journal = "IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications",
issn = "1549-8328",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "7",

}

TY - JOUR

T1 - Systematic design of supply regulated LC-tank voltage-controlled oscillators

AU - Wang, Xuejin

AU - Bakkaloglu, Bertan

PY - 2008/8

Y1 - 2008/8

N2 - Systematic design of low-dropout-regulator (LDO) regulated low-phase-noise LC-tank voltage controlled oscillators (VCOs) is presented. Low-frequency sensitivity profile of power supply induced phase noise of a typical cross-coupled LC-tank VCO is investigated. The relationship between frequency pushing and power supply-induced phase noise is derived. Systematic codesign of VCO sensitivity to low-frequency supply noise with respect to an LDO output noise and power supply rejection profile is introduced. To demonstrate the design approach experimentally, two 2.4-GHz LC-tank VCOs with pMOS and nMOS switching devices powered by PFET LDOs are designed and fabricated on an 0.18-μm, 7-layer metal CMOS process. By using an integrated LDO, it is shown that the VCO phase-noise sensitivity to low frequency improves by 55 dB at 100-kHz offset.

AB - Systematic design of low-dropout-regulator (LDO) regulated low-phase-noise LC-tank voltage controlled oscillators (VCOs) is presented. Low-frequency sensitivity profile of power supply induced phase noise of a typical cross-coupled LC-tank VCO is investigated. The relationship between frequency pushing and power supply-induced phase noise is derived. Systematic codesign of VCO sensitivity to low-frequency supply noise with respect to an LDO output noise and power supply rejection profile is introduced. To demonstrate the design approach experimentally, two 2.4-GHz LC-tank VCOs with pMOS and nMOS switching devices powered by PFET LDOs are designed and fabricated on an 0.18-μm, 7-layer metal CMOS process. By using an integrated LDO, it is shown that the VCO phase-noise sensitivity to low frequency improves by 55 dB at 100-kHz offset.

KW - DC-DC power conversion

KW - Phase noise

KW - Power supply rejection (PSR)

KW - Voltage regulators

KW - Voltage-controlled oscillators (VCOs)

UR - http://www.scopus.com/inward/record.url?scp=50549089619&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50549089619&partnerID=8YFLogxK

U2 - 10.1109/TCSI.2008.918004

DO - 10.1109/TCSI.2008.918004

M3 - Article

AN - SCOPUS:50549089619

VL - 55

SP - 1834

EP - 1844

JO - IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications

JF - IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications

SN - 1549-8328

IS - 7

ER -