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- Wang, Jiazhen, et al.
(author)
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Design of an analog front-end for ambulatory biopotential measurement systems
- 2010
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In: Journal of Semiconductors. - : IOP Publishing. - 1674-4926. ; 31:10, s. 105004-
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Journal article (peer-reviewed)abstract
- A continuously tunable gain and bandwidth analog front-end for ambulatory biopotential measurement systems is presented. The front-end circuit is capable of amplifying and conditioning different biosignals. To optimize the power consumption and simplify the system architecture, the front-end only adopts two-stage amplifiers. In addition, careful design eliminates the need for chopping circuits. The input-referred noise of the system is only 1.19 μVrms (0.48-2000 Hz). The chip is fabricated via a SMIC 0.18 μm CMOS process. Although the power consumption is only 32.1 μW under a 3 V voltage supply, test results show that the chip can successfully extract biopotential signals.
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