Title :
A 16-bit 60/spl mu/W multi-bit /spl Sigma//spl Delta/ modulator for portable ECG applications
Author :
Johansson, Jonny ; Neubauer, Harald ; Hauer, Hans
Author_Institution :
Lulea Univ. of Technol., Sweden
Abstract :
To address the growing field of on-line, out-of-hospital health care a front-end ADC for portable electrocardiographic systems has been designed. The converter is realized as a first-order, 3-bit /spl Sigma//spl Delta/ with an oversampling ratio of 512. Performance is optimized to adhere to the standard IEC60601-2-47, which governs ambulatory ECG equipment. The single ended design achieves a dynamic range of 16 bits for signal offsets up to /spl plusmn/1.25V. Measured power consumption is 60 /spl mu/W with supplies of 2.6V analog and 2.2V digital.
Keywords :
IEC standards; electrocardiography; health care; power consumption; sigma-delta modulation; 16 bit; 2.2 V; 2.6 V; 60E-6 W; ambulatory ECG equipment; first-order /spl Sigma//spl Delta/ modulator; front-end ADC; multibit /spl Sigma//spl Delta/ modulator; on-line health care; out-of-hospital health care; performance optimization; portable ECG applications; portable electrocardiographic systems; signal offsets; single ended design; standard IEC60601-2-47; Delta modulation; Dynamic range; Electrocardiography; Energy consumption; Graphics; Hospitals; Low-frequency noise; Medical services; Power measurement; Signal design;
Conference_Titel :
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European
Conference_Location :
Estoril, Portugal
Print_ISBN :
0-7803-7995-0
DOI :
10.1109/ESSCIRC.2003.1257097
