Abstract:
A 4th-order bandpass /spl Sigma//spl Delta/ modulator for ultrasound applications is presented. By cascading 2 identical 2nd-order Gm-C filters, the 4th-order modulator i...Show MoreMetadata
Abstract:
A 4th-order bandpass /spl Sigma//spl Delta/ modulator for ultrasound applications is presented. By cascading 2 identical 2nd-order Gm-C filters, the 4th-order modulator is designed with high power efficiency, stability and programmability. The modulator dynamic range is 78dB over a 200kHz bandwidth around IF frequency of 3 MHz. The modulator has been implemented in a standard 0.18 /spl mu/m CMOS technology and consumes 2.5 mW from 1.8V power supply.
Published in: Proceedings. 7th International Conference on Solid-State and Integrated Circuits Technology, 2004.
Date of Conference: 18-21 October 2004
Date Added to IEEE Xplore: 13 June 2005
Print ISBN:0-7803-8511-X
Contents 