By Topic

Embedded anti-aliasing in switched-capacitor ladder filters with variable gain and offset compensation

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

5 Author(s)

A combination of continuous-time and switched capacitor integrators in a simulated LC lossless ladder yields a response with suppressed aliasing without the use of continuous-time prefiltering. Fabricated in a 0.35-μm CMOS process, a fifth-order Cauer low-pass filter for a W-CDMA cellular phone receiver has a cutoff frequency of 1.92 MHz and aliasing suppression of better than 40 dB for 30.72-MHz sampling. Without using any tuning mechanism, a 10% accuracy of the cutoff frequency is achieved. As additional features, the filter has variable gain from -13.3 to 16.4 dB and an offset compensation mechanism. With the latter, a 50-mV dc offset added to the input is suppressed to 11 mV or less at the filter output under the maximum gain setting. The filter consumes 2.81 mA at 1.8-V power supply in a die area of 0.62 mm2

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:37 ,  Issue: 3 )