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Analysis and design of a 1.8-GHz CMOS LC quadrature VCO

Författare:
Publiceringsår: 2002
Språk: Engelska
Sidor: 1737-1747
Publikation/Tidskrift/Serie: IEEE Journal of Solid-State Circuits
Volym: 37
Nummer: 12
Dokumenttyp: Artikel
Förlag: IEEE

Sammanfattning

This paper presents a quadrature voltage-controlled oscillator (QVCO) based on the coupling of two LC-tank VCOs. A simplified theoretical analysis for the oscillation frequency and phase noise displayed by the QVCO in the 1/f/sup 3/ region is developed, and good agreement is found between theory and simulation results. A prototype for the QVCO was implemented in a 0.35-/spl mu/m CMOS process with three standard metal layers. The QVCO could be tuned between 1.64 and 1.97 GHz, and showed a phase noise of -140 dBc/Hz or less across the tuning range at a 3-MHz offset frequency from the carrier, for a current consumption of 25 mA from a 2-V power supply. The equivalent phase error between I and Q signals was at most 0.25/spl deg/.

Disputation

Nyckelord

  • Technology and Engineering

Övriga

Published
Yes
  • ISSN: 0018-9200

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