By Topic

A 0.8-V 4.9-mW 1.2-GHz CMOS Fractional-N Frequency Synthesizer for UHF RFID Readers

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
$33 $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

2 Author(s)
Wenting Wang ; Broadcom Corp., Irvine, CA ; Howard C. Luong

A fully integrated CMOS frequency synthesizer for UHF RFID reader is implemented in a 0.18-mum CMOS technology. Due to the large self-interference and the backscatter scheme of the passive tags, reader synthesizer's phase noise requirement is stringent to minimize the sensitivity degradation of the reader RX. The modified transformer feedback voltage-controlled oscillator (VCO) exhibits enhanced tank impedance and even harmonic noise filtering to achieve low phase noise. A third-order 2-bit single-loop SigmaDelta modulator is optimized for the proposed synthesizer in terms of phase noise and power. The synthesizer provides a frequency resolution of 25-kHz with a tuning range from 1.03 GHz to 1.4 GHz . Phase noise of -70 dBc/Hz inband, -104 dBc/Hz at 200-kHz offset and - 121 dBc/Hz at 1-MHz offset with a reference spur of -84 dBc are measured at a center frequency of 1.17 GHz and a loop bandwidth of 35 kHz. Power dissipation is 4.92 mW from a 0.8 V supply.

Published in:

IEEE Transactions on Circuits and Systems I: Regular Papers  (Volume:55 ,  Issue: 9 )