We describe an FPGA (Field Programmable Gate Array) controlled fast data acquisition system with 256 channels suitable for high resolution electrocardiographic (ECG), electrogastrographic (EGG) and late potential (LP) recordings. The A/D converter provides 800ns conversion time with 12 bits. The S11W, a 16 bit, parallel, I/O interface, is used to connect the data acquisition device to a portable SPARC-compatible computer. With only one A/D converter, we have achieved 2 kHz sampling rate for each channel and more than IMB/s overall by using an overlapping delay technique. Channel parameters can be selected independently from one of eight gains ranging from 50 to 10000, and one of three filters ("ECG" 0.05-120Hz, "EGG" 0.001-1Hz and "LP" 60-1kHz). There are eight programmable sampling frequencies from 2Hz to 2kHz. The system is fully battery operated and protected from the defibrillation high voltages to meet the safety requirements. The acquisition system can be widely used in medical research and clinical applications.

Item Type:	Refereed Article
Research Division:	Engineering
Research Group:	Biomedical Engineering
Research Field:	Biomedical Engineering not elsewhere classified
Objective Division:	Expanding Knowledge
Objective Group:	Expanding Knowledge
Objective Field:	Expanding Knowledge in Philosophy and Religious Studies
Author:	Li, CY (Ms Chuan Yong Li)
Author:	Pluta, WK (Dr Pluta)
Author:	Kilpatrick, D (Professor David Kilpatrick)
ID Code:	9638
Year Published:	1997
Deposited By:	Clinical Sciences
Deposited On:	1997-08-01
Last Modified:	2011-08-11
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