Publication: A Nanopower Biopotential Lowpass Filter Using Subthreshold Current-Reuse Biquads with Bulk Effect Self-Neutralization
1
item.page.dc.date.issued
2019-05-01
item.page.dc.type
item.page.dc.identifier.issn
15498328
item.page.dc.identifier.doi
item.page.dc.identifier.other
2-s2.0-85059021423
item.page.dc.rights
Mahidol University
item.page.dc.rights.holder
SCOPUS
item.page.dc.identifier.citation
IEEE Transactions on Circuits and Systems I: Regular Papers. Vol.66, No.5 (2019), 1746-1757
punsarn.item.page.citation
Chutham Sawigun, Surachoke Thanapitak A Nanopower Biopotential Lowpass Filter Using Subthreshold Current-Reuse Biquads with Bulk Effect Self-Neutralization. IEEE Transactions on Circuits and Systems I: Regular Papers. Vol.66, No.5 (2019), 1746-1757. doi:10.1109/TCSI.2018.2885954 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/50847
Research Projects
Organizational Units
Authors
Journal Issue
relationships.isThesisOf
item.page.dc.title
A Nanopower Biopotential Lowpass Filter Using Subthreshold Current-Reuse Biquads with Bulk Effect Self-Neutralization
item.page.dc.contributor.author
item.page.dc.contributor.other
item.page.dc.description.abstract
© 2018 IEEE. A nanopower CMOS 4th-order lowpass filter suitable for biomedical applications is presented. The filter is formed by cascading two types of subthreshold current-reuse biquadratic cell. Each proposed cell is capable of neutralizing the bulk effect that induces the passband attenuation. The nearly 0-dB passband gain can thus be maintained, while the entire filter circuit remains compact and power-efficient. Designed for electrocardiogram detection as an example of application, the filter prototype has been fabricated in a 0.35 μm CMOS process occupying 269 μm × 383 μm chip area. Measurements verify that the filter can operate from a 1.5-V single supply and consumes 5.25 nW, while providing a cutoff frequency of 100 Hz and input-referred noise of 39.38 μ V rms . The intermodulation-free dynamic range of 51.48 dB is obtained from a two-tone test of 50 and 60 Hz input frequencies. Compared with state-of-the-art nanopower lowpass filters using the most relevant and reasonable figure of merit, the proposed filter ranks the best.