A 1.7 GHz Tuning Range LC-VCO with Varactors Array and Switched Cross-Coupled Core

This work presents an LC-VCO with degeneration resistor core-based topology, Switched Varactors Array (SVA) for discrete frequency control and Switched Cross-Coupled Core (SCC) for power optimization. The SVA application allows an extended tuning range enhancement, and the SCC structure defines the...

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Bibliographic Details
Published in2024 IEEE Computer Society Annual Symposium on VLSI (ISVLSI) pp. 699 - 703
Main Authors Souza, Raphael R N., Pinto, Agord M., De Orio, Roberto L., Manera, Leandro T., De Lima, Eduardo R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2024
Subjects
degeneration resistors
LC-VCO
Phase noise
Power demand
Prototypes
Resistors
Switched Cross-Coupled Core (SCC)
Switched Varactors Array (SVA)
Switches
Varactors
Voltage-controlled oscillators
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Summary:This work presents an LC-VCO with degeneration resistor core-based topology, Switched Varactors Array (SVA) for discrete frequency control and Switched Cross-Coupled Core (SCC) for power optimization. The SVA application allows an extended tuning range enhancement, and the SCC structure defines the proper power level, according to the working frequency. From V CC = 1.2V and bias current I DC = 2.47 to 10.3 mA, a phase noise PN = -125.4 to -130.5 dBc/Hz@1MHz is obtained for different frequency conditions, considering a tuning range FTR = 94% (FoM T = -210). The schematic level design was performed in Cadence environment by applying TSMC 65 nm CMOS technology.
ISSN:2159-3477
DOI:10.1109/ISVLSI61997.2024.00134