A novel response-translating lowpass filter achieving 1.4-to-15-Hz tunable cutoff for biopotential acquisition systems | |
Ma C.-T.; Mak P.-I.![]() ![]() ![]() | |
2010-12-20 | |
Conference Name | 2010 Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics (PrimeAsia) |
Source Publication | PrimeAsia 2010 - 2nd Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics |
Pages | 404-407 |
Conference Date | 22-24 Sept. 2010 |
Conference Place | Shanghai, China |
Abstract | This paper presents a response-translation technique to realize an ultra-low-cutoff lowpass filter in small area for biopotential acquisition systems. It is by exploiting a chopper-stabilized instrumentation amplifier (IA) with bandpass characteristic to obtain a lowpass response after chopper stabilization, resulting in substantial area savings because of relaxed time constant in the implementation. Optimized in a 90-nm CMOS process with 2.5-V thick-oxide devices, a 2-order OTA-C ladder filter demonstrates -40 dB/decade stopband attenuation, 1.4-15 Hz frequency tunability, and strong relaxation of the required time constant (depends on the set chopper frequency). The entire lowpass filter draws 8.37 μA at a 3-V supply. |
DOI | 10.1109/PRIMEASIA.2010.5604876 |
URL | View the original |
Fulltext Access | |
Citation statistics | |
Document Type | Conference paper |
Collection | DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING INSTITUTE OF MICROELECTRONICS |
Affiliation | Universidade de Macau |
Recommended Citation GB/T 7714 | Ma C.-T.,Mak P.-I.,Vai M.-I.,et al. A novel response-translating lowpass filter achieving 1.4-to-15-Hz tunable cutoff for biopotential acquisition systems[C],2010:404-407. |
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