By Topic

A CMOS switched transconductor mixer

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

4 Author(s)
E. A. M. Klumperink ; MESA+ Res. Inst., Univ. of Twente, Enschede, Netherlands ; S. M. Louwsma ; G. J. M. Wienk ; B. Nauta

A new CMOS active mixer topology can operate at low supply voltages by the use of switches exclusively connected to the supply voltages. Such switches require less voltage headroom and avoid gate-oxide reliability problems. Mixing is achieved by exploiting two transconductors with cross-coupled outputs, which are alternatingly activated by the switches. For ideal switching, the operation is equivalent to a conventional active mixer. This paper analyzes the performance of the switched transconductor mixer, in comparison with the conventional mixer, demonstrating competitive performance at a lower supply voltage. Moreover, the new mixer has a fundamental noise benefit, as noise produced by the switch-transistors and LO-port is common mode noise, which is rejected at the differential output. An experimental prototype with 12-dB conversion gain was designed and realized in standard 0.18-μm CMOS to operate at only a 1-V supply. Experimental results show satisfactory mixer performance up to 4 GHz and confirm the fundamental noise benefit.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:39 ,  Issue: 8 )
IEEE RFIC Virtual Journal