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A CMOS Discrete-Time Reconfigurable Analogue ASIC for Low Power Biomedical Signal Filtering

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5 Author(s)
Lei Wang ; Inst. of Biomed. & Health Eng. (IBHE), Shenzhen Institutes of Adv. Technol. (SIAT), Shenzhen, China ; Shaona Ren ; Baosheng Liu ; Guozeng Wang
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Recent years have seen an increasing number of application specific integrated circuits (ASICs) designated for various biomedical applications. In this paper we presented a CMOS reconfigurable analogue ASIC working on the discrete-time mode for low power biomedical signal filtering. The ASIC we have developed incorporates a switched-capacitor based analogue module, a current source, a voltage source, an oscillator, and a double-phase non-overlapping clock source offering different clock rates. By alternating the circuit topologies and the clock frequencies for the on-chip switched-capacitors the ASIC could be dynamically configured as a high-pass filter or a low-pass filter with adjustable cut-off frequencies and pass-band gains. The ASIC was fabricated using the SMIC 0.18 um CMOS technology with a die size of 1.0 times 1.2 mm and the power consumption of approximately 1.1 mW. The ASIC was fully tested and the results indicated that the ASIC performed as desired. In the future an autonomous field programmable analogue array ASIC will be developed based on the current design.

Published in:

Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on

Date of Conference:

11-13 June 2009

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