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 language | English (US) |
|---|---|
| Pages (from-to) | 1834-1844 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Circuits and Systems I: Regular Papers |
| Volume | 55 |
| Issue number | 7 |
| DOIs | |
| State | Published - Aug 2008 |
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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 journal › Article
}
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 -