DocumentCode :
236223
Title :
A femto ampere current amplifier based on a 30 000∶1 cryogenic current comparator
Author :
Rengnez, F. ; Seron, O. ; Devoille, L. ; Placko, D. ; Piquemal, F.
Author_Institution :
LNE, Trappes, France
fYear :
2014
fDate :
24-29 Aug. 2014
Firstpage :
296
Lastpage :
297
Abstract :
A Cryogenic Current Comparator (CCC) used as a SET current amplifier with a maximum current ratio of 30 000 : 1 has been developed at LNE. The equivalent input current noise was found lower than 2 fA/Hz1/2 over a frequency range 1 Hz to 350 Hz in both operating modes. A new matrix method allows the analytical determination of the electrical behavior of the CCC to estimate the AC current ratio error. The error on 30 000:1 ratio is estimated less 10-8 at 1 Hz.
Keywords :
amplifiers; circuit noise; cryogenic electronics; current comparators; electric current measurement; AC current ratio error estimation; CCC; LNE; SET current amplifier; cryogenic current comparator; current measurement; equivalent input current noise; femtoampere current amplifier; frequency 1 Hz to 350 Hz; matrix method; Cryogenics; Current measurement; Electrical resistance measurement; Impedance; Resonant frequency; SQUIDs; Windings; Cryogenic Current Comparator (CCC); low current metrology; single electron tunneling; small-current measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
ISSN :
0589-1485
Print_ISBN :
978-1-4799-5205-2
Type :
conf
DOI :
10.1109/CPEM.2014.6898376
Filename :
6898376
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=236223
بازگشت