A chopper stabilized front-end for neural recording applications with DC-drift suppressed amplifier

Kai Wen Yao, Wei Chih Lin, Cihun Siyong Alex Gong, Ming Chih Tsai, Yu Ting Hsueh, Muh Tian Shiue

研究成果: 書貢獻/報告類型會議論文篇章同行評審

2 引文 斯高帕斯(Scopus)

摘要

A chopper stabilized front-end with an active dc-suppressed topology used to record extracellular neural action potentials and local field potentials is presented in this paper. An active dc-suppressed topology, such as a bandpass filter, containing an amplifier with an integrator on the feedback path, suppresses baseline drift and assures weak inversion operations of input stages of the proposed bandpass filter. Floating tunable resistors are also employed to produce large resistance, providing large time constant to reduce low frequency noise. The proposed front-end circuitry needs no external capacitors and resistors and adjusts highpass cutoff frequency arbitrarily by altering control voltage of floating tunable resistors. The work in this paper, designed in a 0.18-μm CMOS process, provides sufficiently high linearity at least 10-bit SNDR, a midband gain of 63 dB, and signal bandwidth of approximately 13 kHz. Supplied at 1.8 V, the proposed front-end consumes around 231 μW. With the proposed chopping technique, a total of 7.05-μVrms input-referred noise can be achieved at the signal bandwidth.

原文???core.languages.en_GB???
主出版物標題2009 IEEE Biomedical Circuits and Systems Conference, BioCAS 2009
頁面77-80
頁數4
DOIs
出版狀態已出版 - 2009
事件2009 IEEE Biomedical Circuits and Systems Conference, BioCAS 2009 - Beijing, China
持續時間: 26 11月 200928 11月 2009

出版系列

名字2009 IEEE Biomedical Circuits and Systems Conference, BioCAS 2009

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???event.eventtypes.event.conference???2009 IEEE Biomedical Circuits and Systems Conference, BioCAS 2009
國家/地區China
城市Beijing
期間26/11/0928/11/09

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