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Tail current noise suppression in RF CMOS VCOs

In English

Författare

Summary, in English

This paper presents the experimental results of two different techniques, inductive degeneration and capacitive filtering, for reducing the phase noise in tail-biased RF CMOS voltage-controlled oscillators (VCOs). Both techniques prevent the low-frequency tail current noise from being converted into phase noise. The techniques are applied to two distinct VCO designs, showing that the largest phase noise reduction (up to 6-7 dB at 3-MHz offset frequency from the carrier) is achieved via inductive degeneration. Capacitive filtering, however, also substantially reduces the phase noise at high offset frequencies and may therefore become a valid alternative to inductive degeneration, as discrete capacitors are of more common use than discrete inductors.

Publiceringsår

2002

Språk

Engelska

Sidor

342-348

Publikation/Tidskrift/Serie

IEEE Journal of Solid-State Circuits

Volym

37

Issue

3

Dokumenttyp

Artikel i tidskrift

Förlag

IEEE - Institute of Electrical and Electronics Engineers Inc.

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

  • phase noise
  • CMOS
  • VCO
  • RF

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0018-9200