josep maria margarit taulédesign & analysis of a 2.4-ghz cmos qvco using amss35d4 design &...
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![Page 1: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/1.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Design & analysis of a 2.4 GHz Design & analysis of a 2.4 GHz CMOS Quadrature VCO using CMOS Quadrature VCO using
AMSS35D4 technologyAMSS35D4 technology
RFSoC – Final ProjectRFSoC – Final ProjectMaster in Electronics EngineeringMaster in Electronics Engineering
Josep Maria Margarit Taulé
Advisor: Xavier Aragonès Cervera
Escola Tècnica Superior d’Enginyeria de Telecomunicació de Barcelona
UNIVERSITAT POLITÈCNICA DE CATALUNYA
![Page 2: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/2.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
11 IntroductionIntroduction
22 Design procedureDesign procedure
33 ResultsResults
44 ConclusionConclusion
Introduction Design procedure Results Conclusion
![Page 3: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/3.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
11 IntroductionIntroduction
22 Design procedure Design procedure
33 Results Results
44 ConclusionConclusion
Introduction Design procedure Results Conclusion
![Page 4: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/4.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
IntroductionIntroduction
Complete design procedure of a 2.4 GHz LC CMOS quadrature VCO.
Process technology: AMSS35D4 (SiGe 0.35 m, 4-metal, thick metal available).
Tasks:
Initial rough calculations Accurate cadence rf-modelled simulation and tuning Result analysis and conclusions
![Page 5: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/5.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
11 Introduction Introduction
22 Design procedureDesign procedure
33 Results Results
44 ConclusionConclusion
Introduction Design procedure Results Conclusion
![Page 6: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/6.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
SpecsSpecs
Spec Units Value
Vdd V 3.3
Power consumption mW <25
Output load k,pF
f0 GHz 2.4
Tuning range MHz 100
Harmonic distortion dBc <-40
S.E. output amp. V 1 Vpp ± 15%
Phase noise dBc <-100
Phase error º <1
1kΩ 0.4pF
Specs Calculations Single VCO QVCO
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Handy calculationsHandy calculations
First order, simplified expressions from subject topics
Automatic calculation procedure
Specs Calculations Single VCO QVCO
Excel worksheet
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Single VCO (L selection)Single VCO (L selection)
Thick metal (higher Q)
Large L/Q desired: less power consumption
TOTL 2.42nH 2 4.84nH
SL
W L 2 2.4e9 4.84e 9R 7.848
Q 9.6
2PL SR R 1 Q 686.613
Specs Calculations Single VCO QVCO
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Single VCO (varactor selection)Single VCO (varactor selection)
Minimum varactors
Higher QT
TOT 20
var
1C 908.6fF
W L
C8.33%
CC 8.33e 2 908.6fF 75.69fF C
Specs Calculations Single VCO QVCO
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Single VCO (ISingle VCO (Itail tail calculation)calculation)
Losses estimation:
Itail must be:
Specs Calculations Single VCO QVCO
Ptotal load Pinductor PveqR R R R
ptotaltotal
0
RQ
Z
tan k tan ktail
ptotal total 0
2V 2VI
R Q Z
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Single VCO (nmos W-L choice)Single VCO (nmos W-L choice)
From previous Itail calculation (b=2):
But... Transistor losses!
Specs Calculations Single VCO QVCO
m biasptotal
4 Wg 2K ' I
R L
ptotal load Pinductor Pveq PequivnmosR R R R R
L=1 µm
Further considerations:
Adjustments Iterative tran simulations
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Single VCOSingle VCO
Itail =7 mA
gm=13 mS
W=75 µm
L=1 µm
Specs Calculations Single VCO QVCO
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion Specs Calculations Single VCO QVCO
QVCOQVCO
![Page 14: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/14.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion Specs Calculations Single VCO QVCO
QVCO (coupling definition)QVCO (coupling definition)
Coupling factor:
couplingnmos
switchingnmos
W
W
Trade-off:
α Phase noise , but phase error !! α =1/3
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion Specs Calculations Single VCO QVCO
QVCO (center frequency tuning)QVCO (center frequency tuning)
Pss simulations
From an initial frequency (f0i):
Cpoly resizing
parasitics var poly20i
1C C C
L W
~350 fF
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
11 Introduction Introduction
22 Design procedure Design procedure
33 ResultsResults
44 ConclusionConclusion
Introduction Design procedure Results Conclusion
![Page 17: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/17.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Results (I-Q transient analysis)Results (I-Q transient analysis)
Vtank ~ 900 mV
Tinit ~ 1.5 µs
I-Q tran F/V Harm./Ph. noise Ph. error Summary
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Results (f/V pss analysis)Results (f/V pss analysis)
ftun ~ 2.35-2.45 GHz
KVCO ~ 268 MHz/V
I-Q tran F/V Harm./Ph. noise Ph. error Summary
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Results (harmonic/phase noise analysis)Results (harmonic/phase noise analysis)
Max. Harm. level ~ -43.3 dBc
Phase noise (600 kHz) ~ -118 dBc
I-Q tran F/V Harm./Ph. noise Ph. error Summary
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Results (phase error)Results (phase error)
Phase error:
phase
1.09p360 0.942º
1
2.4e9
I-Q tran F/V Harm./Ph. noise Ph. error Summary
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
Results (summary)Results (summary)
QVCO final parameters
QVCO final results
I-Q tran F/V Harm./Ph. noise Ph. error Summary
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
11 Introduction Introduction
22 Design procedure Design procedure
33 Results Results
44 ConclusionConclusion
Introduction Design procedure Results Conclusion
![Page 23: Josep Maria Margarit TauléDesign & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4 Design & analysis of a 2.4 GHz CMOS Quadrature VCO using AMSS35D4 technology](https://reader035.vdocuments.us/reader035/viewer/2022062322/5697bf711a28abf838c7e0ab/html5/thumbnails/23.jpg)
Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Introduction Design procedure Results Conclusion
ConclusionConclusion
Complete design procedure of a 2.4 GHz LC CMOS quadrature VCO (SiGe 0.35 m, 4-metal, thick metal tech process)
Tech. main drawback: low QL Itail
Design key points:
L selection (highest L-Q at main frequency)
But... Ctotal>Cparasitics!!
gds to be considered!
Coupling factor trade-off (Phase noise vs. Phase error)
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Josep Maria Margarit Taulé Design & analysis of a 2.4-GHz CMOS QVCO using AMSS35D4
Design & analysis of a 2.4 GHz Design & analysis of a 2.4 GHz CMOS Quadrature VCO using CMOS Quadrature VCO using
AMSS35D4 technologyAMSS35D4 technology
RFSoC – Final ProjectRFSoC – Final ProjectMaster in Electronics EngineeringMaster in Electronics Engineering
Josep Maria Margarit Taulé
Advisor: Xavier Aragonès Cervera
Escola Tècnica Superior d’Enginyeria de Telecomunicació de Barcelona
UNIVERSITAT POLITÈCNICA DE CATALUNYA