Paper Info
Title
A High Input Impedance Chopper Amplifier Using Negative Impedance Convertor For Implantable Eeg Recording
Abstract
Negative impedance convertor is introduced to build a high input impedance chopper IA for implantable EEG recording. The compensation theory is analyzed in detail to reveal the characteristics of the impedance boosting method. The proposed chopper IA achieves very high input impedance of 18.9 G Omega and 18.5 G Omega at DC and 100 Hz respectively. It can reach 5.8 G Omega even at 1 kHz. With the common-mode feedback loop, up to 600 mVpp common-mode interference tolerance and 97 dB CMRR are achieved. The amplifier is implemented in a 0.18 mu m standard CMOS process and takes a power consumption of 1.34 mu W with a 1.2 V supply. The mid-band input referred noise PSD is 130 nV/sqrt(Hz) and an NEF of 4.89 is obtained.
Year
DOI
Venue
2020
10.1587/elex.17.20200238
IEICE ELECTRONICS EXPRESS
Keywords
DocType
Volume
chopper amplifier, negative impedance convertor, impedance boosting, high impedance, EEG recording
Journal
17
Issue
ISSN
Citations 
17
1349-2543
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Zhiming Liang100.34
Bin Li211.03
Zhaohui Wu300.68
Yunfeng Hu42814.38