A time-to-digital converter based AFC for wideband frequency synthesizer

Deping Huang, Wei Li, Jin Zhou, Ning Li, Junyan Ren, Jinghong Chen

Research output: Contribution to conferencePaperpeer-review

Abstract

The automatic frequency calibration (AFC) technique is routinely used in the wideband frequency synthesizers which contain multiple voltage-controlled oscillator (VCO) tuning curves. In this paper, a counter-based AFC design method is presented. The relationship between the AFC counting time and the VCO tuning curve characteristic is quantitatively analyzed. An AFC circuit which uses a time-to-digital converter (TDC) in the counting process is developed. Simulation results show that the proposed circuit significantly reduces the AFC calibration time while preserving the calibration accuracy. The simulated error-free AFC time of the proposed AFC is less than 3 μs.

Original languageEnglish (US)
Pages1299-1302
Number of pages4
DOIs
StatePublished - Sep 28 2012
Externally publishedYes
Event2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012 - Seoul, Korea, Republic of
Duration: May 20 2012May 23 2012

Other

Other2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012
Country/TerritoryKorea, Republic of
CitySeoul
Period5/20/125/23/12

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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