Du är här

More on the 1/f2 Phase Noise Performance of CMOS Differential-Pair LC-Tank Oscillators

Författare:
Publiceringsår: 2006
Språk: Engelska
Sidor: 2703-2712
Publikation/Tidskrift/Serie: IEEE Journal of Solid-State Circuits
Volym: 41
Nummer: 12
Dokumenttyp: Artikel
Förlag: IEEE

Sammanfattning

This paper presents a rigorous phase noise analysis in the 1/f2 region for the differential CMOS LC-tank oscillator with both nMOS and pMOS switch pairs. A compact, closed-form phase noise equation is obtained, accounting for the noise contributions from both tank losses and transistors currents, which allows a robust comparison between LC oscillators built with either one or two switch pairs. The fabricated oscillator prototype is tunable between 2.15 and 2.35 GHz, and shows a phase noise of -144 dBc/Hz at 3 MHz offset from the 2.3 GHz carrier for a 4 mA bias current. The phase noise figure-of-merit is practically constant across the tuning range, with a minimum of 191.5 dBc/Hz. A reference single-switch-pair oscillator has been implemented and tested as well, and the difference between the phase noise levels displayed by the two oscillators is very nearly the one expected from theory

Disputation

Nyckelord

  • Technology and Engineering

Övrigt

Published
Yes
  • ISSN: 0018-9200

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen

LERU logo U21 logo