Title
A Direct Digitizing Chopped Neural Recorder Using a Body-Induced Offset Based DC Servo Loop
Abstract
This article presents a direct digitizing neural recorder that uses a body-induced offset based DC servo loop to cancel electrode offset (EDO) on-chip. The bulk of the input pair is used to create an offset, counteracting the EDO. The architecture does not require AC coupling capacitors which enables the use of chopping without impedance boosting while maintaining a large input impedance of 238 M <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\Omega$</tex-math></inline-formula> over the whole 10 kHz bandwidth. Implemented in a 180 nm HV-CMOS process, the prototype occupies a silicon area of only 0.02 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> while consuming 12.8 μW and achieving 1.82 μV <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$_{\text{rms}}$</tex-math></inline-formula> of input-referred noise in the local field potential (LFP) band and a NEF of 5.75.
Year
DOI
Venue
2022
10.1109/TBCAS.2022.3177241
IEEE Transactions on Biomedical Circuits and Systems
Keywords
DocType
Volume
Amplifiers, Electronic,Electric Impedance,Electrodes,Equipment Design
Journal
16
Issue
ISSN
Citations 
3
1932-4545
0
PageRank 
References 
Authors
0.34
20
4
Name
Order
Citations
PageRank
Markus Sporer192.93
Stefan Reich283.26
John G Kauffman300.34
Maurits Ortmanns4501114.46