Department of Electrical Engineering and Computer Science
Integrated Nano-Systems Laboratory
2. Conference Papers
16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails
- Title
- 16-Channel High-CMRR Neural-Recording Amplifiers Using Common-Made-Tracking Power Supply Rails
- Author(s)
- Jang, Doojin ; Lee, Taeju ; Jeon, Hyuntak ; Koh, Seoktae ; Choi, Jaesuk ; Lee, Junghyup ; Je, Minkyu
- Issued Date
- 2018-08-16
- Citation
- 2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018
- Type
- Conference Paper
- ISBN
- 9781538659717
- ISSN
- 0000-0000
- Abstract
- This paper presents a neural recording amplifier that operates in environments where large common-mode signals interfere. The proposed scheme employs two types of LDOs that generate isolated supply voltages and a buffer to sense a common-mode signal. Thanks to the isolated supply rails, both the intrinsic common-mode rejection ratio (ICMRR) and common-mode input impedance of the low-noise amplifier (LNA) are increased, which leads to the total common-mode rejection ratio (TCMRR) above 89.2 dB up to 1 kHz even in 16-channel recording with a shared reference electrode. Compared to the conventional method, the TCMRR is improved by 48.7 dB even for 28% mismatch of the electrode-tissue impedance (ETI) and 1% mismatch of the LNA input capacitances. © 2018 IEEE.
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Related Researcher
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Lee, Junghyup
- Research Interests Analog and Mixed Signal IC Design; Smart Sensor Systems; Bio-medical ICs and Body Channel Communication Systems
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