Paper Info
Title
A 1.85 fA/√Hz fully integrated read-out interface for sub-pA current sensing applications
Abstract
This paper presents a sub-pA current read-out interface that consists of a series connection of a low-noise current amplifier and a second-order continuous-time Delta-Sigma modulator. Contrary to the approach to the current amplification by means of a series connection of a charge integrator and differentiator, no reset and thus no interruption of the current-to-digital conversion needs to be performed. Moreover, the intrinsic anti-aliasing filtering of the continuous-time Delta-Sigma modulator provides a minimum suppression of -70dB for interferers and noise around multiples of the sampling frequency, thus making the implementation of an explicit anti-aliasing filtering block obsolete. The system is implemented in a 0.35μm CMOS technology and provides a resolution of 0.3pA in a bandwidth of 10kHz. It occupies an area of 0.6mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> and consumes a power of 7mW drawn from a ±1.5V supply voltage.
Year
DOI
Venue
2017
10.1109/ESSCIRC.2017.8094599
ESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference
Keywords
Field
DocType
sub-pA current sensing applications,series connection,low-noise current amplifier,current amplification,current-to-digital conversion,intrinsic anti-aliasing filtering,second-order continuous-time delta-sigma modulator,sub-pA current read-out interface,size 0.35 mum,current 0.3 pA,frequency 10.0 kHz,power 7.0 mW
Current-feedback operational amplifier,Differentiator,Computer science,Voltage,Integrator,Electronic engineering,CMOS,Bandwidth (signal processing),Resistor,Series and parallel circuits,Electrical engineering
Conference
ISBN
Citations 
PageRank 
978-1-5090-5026-0
1
0.37
References 
Authors
3
3
Name
Order
Citations
PageRank
Mohammad Amayreh141.94
Yiannos Manoli2523105.73
Matthias Keller322516.50