A BAND-PASS DELTA-SIGMA MODULATOR FOR ULTRASOUND IMAGING AT 160 MHZ CLOCK RATE

Authors
NORMAN O
Citation
O. Norman, A BAND-PASS DELTA-SIGMA MODULATOR FOR ULTRASOUND IMAGING AT 160 MHZ CLOCK RATE, IEEE journal of solid-state circuits, 31(12), 1996, pp. 2036-2041
Citations number
5
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
IEEE journal of solid-state circuits → ACNP
ISSN journal
00189200
Volume
31
Issue
12
Year of publication
1996
Pages
2036 - 2041
Database
ISI
SICI code
0018-9200(1996)31:12<2036:ABDMFU>2.0.ZU;2-M
Abstract
A fourth-order band-pass delta-sigma modulator for ultrasound imaging is described, It is implemented in a 0.8-mu m BiCMOS process using swi tched 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 no tch functions for B-mode (wide band) and CW-mode (narrow band) scannin g, respectively.