Cart (Loading....) | Create Account
Close category search window
 

A Digital Intensive Fractional-N PLL and All-Digital Self-Calibration Schemes

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Wang, Ping-Ying ; RF Div., MediaTek Inc., Hsinchu, Taiwan ; Zhan, J.-H.C. ; Hsiang-Hui Chang ; Hsiang-Hui Chang

A digital intensive PLL featuring a digital filter in parallel with an analog feed-forward path and a digital controlled oscillator (DCO) is presented. Digital loop filter replaces analog passive filter to reduce chip area and associated gate-leakage in advanced process. It also allows the PLL loop gain and DCO gain to be digitally calibrated to within 100 ppm within 50 mus. Such fine frequency resolution enables the PLL to accurately compensate for the loop parameter variation due to process, voltage and temperature (PVT). The analog feed-forward path is insensitive to quantization error of fractional-N divider and DCO nonlinearity. Direct modulating the DCO frequency and phase through the analog feed-forward path, and compensating the modulating signal digitally for the DCO gain variation are demonstrated. At 3.6 GHz all fractional spurs are under - 75 dBc. The phase noise at 400 kHz and 3 MHz are -115.6 dBc/Hz and -134.9 dBc/Hz, respectively. The chip is fabricated in a 0.13 mu m CMOS process, and occupies an active area of 0.85 mm2 and draws 40 mA from a 1.5 V supply including all auxiliary circuitry.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:44 ,  Issue: 8 )

Date of Publication:

Aug. 2009

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.