By Topic

A high-accuracy CMOS oversampling switched-current sample/hold (S/H) circuit using feedforward approach

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

2 Author(s)
Renyuan Huang ; Dept. of Electr. Eng., Michigan State Univ., East Lansing, MI, USA ; Chin-Long Wey

This brief presents a CMOS oversampling current sample/hold (S/H) circuit using feedforward approach. The circuit adopts an integrating feedback structure which reduces the possible errors of the current copier used to sample the input current, due to clock feedthrough, channel-length modulation and capacitive feedback. The feedforward significantly reduces the output swing of the integrator and thus improves the stability and accuracy of the circuit. As a result, high accuracy is obtained with only first-order integration and a low oversampling ratio, and the useful bandwidth is enlarged. Simulation results show a 90-dB signal-to-distortion ratio, which is more than 20-dB improvement over a simple current copier, where the SCDN20 2-μm CMOS process and 3.3-V supply voltage are assumed

Published in:

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:45 ,  Issue: 3 )