By Topic

A 10MHz BW 78dB DR CT ΣΔ modulator with novel switched high linearity VCO-based quantizer

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

6 Author(s)
Tao He ; State-Key Laboratory of Analog and Mixed Signal VLSI, Faculty of Science and Technology, University of Macau, Macao, China ; Yang Jiang ; Yun Du ; Sai-Weng Sin
more authors

A novel structure of VCO-based quantizer for CT ΣΔ modulator is presented which can significantly improve the VCO linearity. Compared to the traditional methods, the proposed structure uses only one VCO in the system and it also maintains the intrinsic Dynamic Element Matching (DEM) function of the VCO-based quantizer. A first order CT ΣΔ modulator with the proposed quantizer is designed and simulated in a 65nm CMOS process. The DAC of the ΣΔ modulator is optimized, which can also save half of the DAC cells. The performance of the modulator can reach 69/67 dB SNR/SNDR and a dynamic range of 78 dB with a bandwidth of 10MHz at 1V supply voltage.

Published in:

2012 IEEE International Symposium on Circuits and Systems

Date of Conference:

20-23 May 2012