By Topic

Balanced CMOS LC-tank analog frequency dividers for quadrature LO generation

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

3 Author(s)
A. Mazzanti ; DII, Universita di Modena e Reggio Emilia, Italy ; L. Larcher ; F. Svelto

A regenerative circuit based on an LC-tank balanced divider is proposed in this paper for quadrature LO signal generation. For given tank quality factor, it provides larger operation bandwidth and improved quadrature accuracy when compared with conventional injection locked frequency dividers. The operation bandwidth can be adjusted dynamically simply regulating the biasing current. Experimental results, carried on 0.18 μm CMOS prototypes, show 42% range with a tank quality factor of 13.5 while driving 1.5pF output capacitance. At the band edge, biasing current is 8mA. Quadrature accuracy has been verified through the achievable image rejection of a purposely developed single side band up-converter. Measurements, performed on five samples, show a minimum image rejection of 44dB.

Published in:

Proceedings of the IEEE 2005 Custom Integrated Circuits Conference, 2005.

Date of Conference:

18-21 Sept. 2005