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Full oscillation cycle phase noise analysis of differential CMOS LC oscillators

In English

Författare

Summary, in English

This paper analyzes the phase noise of the widely used differential LC oscillator topology and presents brief equations describing phase noise over the entire oscillation period. The findings show that if a capacitance is present at the source node of the differential pair, two phenomena occur that increase the phase noise: the switch time increases, lengthening the interval spent in a noisy balanced state and increasing the transistor noise excess factor; and at higher frequencies the unbalanced state starts to contribute phase noise. The analysis is based upon the superposition of piecewise linear equations using the EKV transistor model, which includes a concise formulation of the noise excess factor.

Publiceringsår

2006

Språk

Engelska

Sidor

211-222

Publikation/Tidskrift/Serie

Analog Integrated Circuits and Signal Processing

Volym

48

Issue

3

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

  • CMOS
  • voltage controlled oscillators
  • phase noise

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0925-1030