Title :
A band-pass delta-sigma modulator for ultrasound imaging at 160 MHz clock rate
Author_Institution :
Comlinear Corp., Ft. Collins, CO, USA
fDate :
12/1/1996 12:00:00 AM
Abstract :
A fourth-order band-pass delta-sigma modulator for ultrasound imaging is described. It is implemented in a 0.8-μm BiCMOS process using switched capacitors. The signal band is centered at 5 MHz and is 2.5 MHz wide, where the modulator´s dynamic range is 84 dB at a sampling rate of 160 MHz. Noise shaping can be programmed between band-reject and notch functions for B-mode (wide band) and CW-mode (narrow band) scanning, respectively
Keywords :
BiCMOS integrated circuits; acoustic signal processing; array signal processing; biomedical electronics; biomedical ultrasonics; digital-analogue conversion; integrated circuit noise; sigma-delta modulation; signal sampling; switched capacitor networks; 0.8 mum; 160 MHz; 2.5 MHz; B-mode scanning; BiCMOS process; CW-mode scanning; array signal processing; band-pass delta-sigma modulator; band-reject functions; fourth-order delta-sigma modulator; modulator dynamic range; narrow band scanning; notch functions; phased array US imaging; programable noise shaping; sampling rate; switched capacitors; ultrasound imaging; wide band scanning; Attenuation; BiCMOS integrated circuits; Clocks; Delta modulation; Dynamic range; Noise shaping; Quantization; Signal sampling; Ultrasonic imaging; Wideband;
Journal_Title :
Solid-State Circuits, IEEE Journal of
