Cart (Loading....) | Create Account
Close category search window

An Input-Feedforward Multibit Adder-Less \Delta {-}\Sigma Modulator for Ultrasound Imaging Systems

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

3 Author(s)
Youngjae Jung ; Dept. of Electr. Eng., Hanyang Univ., Ansan, South Korea ; Hyungdong Roh ; Jeongjin Roh

This paper describes a high-speed delta-sigma modulator with 65-nm CMOS technology for ultrasound imaging systems. The delta-sigma modulator is based on a 4th-order single-loop switched-capacitor architecture with a 4-bit quantizer. The designed modulator has the advantages associated with input-feedforward architecture, such as the reduced output swing of the integrator, which relaxes the amplifiers' design requirements. Due to the power and area overheads and the timing constraint of the active adder in the conventional multibit input-feedforward modulator, we use an adder-less input-feedforward delta-sigma architecture. As a result, the designed architecture eliminates the extra power consumption and silicon area required by the adder. The designed architecture also relaxes the timing requirement for the quantizer and the dynamic element-matching block compared with the conventional delta-sigma modulator. The modulator achieves a dynamic range of 76dB and a peak signal-to-noise-plus-distortion ratio of 72.3 dB in a signal bandwidth of 6 MHz. The power consumption is 18.5 mW with 1.2-V supply voltage, and the chip core size is 0.25 mm2. The energy required per conversion step is 0.46 pJ/conv.

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:62 ,  Issue: 8 )

Date of Publication:

Aug. 2013

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.