Title :
20.5 A Sub-pA ΔΣ Current Amplifier for Single-Molecule Nanosensors
Author :
Bennati, Marco ; Thei, Federico ; Rossi, Michele ; Crescentini, Marco ; Avino, Gennaro D. ; Baschirotto, Andrea ; Tartagni, Marco
Author_Institution :
Univ. of Bologna, Cesena
Abstract :
This paper presents a circuit approach based on a current-mode DeltaSigma converter having a noise floor below 150 fArms at 1kHz and at room temperature. The main advantages of this approach are that: 1) it offers a digital output that can be easily multiplexed for nanoarrays; 2) the noise floor and bandwidth trade-off is easily set by using oversampling ratios; and 3) it implements a correlated-double- sampling (CDS) scheme to reduce the 1/f noise.
Keywords :
amplifiers; analogue-digital conversion; nanosensors; current 150 fA; frequency 1 kHz; single-molecule nanosensors; sub-pA DeltaSigma current amplifier; temperature 293 K to 298 K;
Conference_Titel :
Solid-State Circuits Conference - Digest of Technical Papers, 2009. ISSCC 2009. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-3458-9
DOI :
10.1109/ISSCC.2009.4977451
