Author/Authors :
Yates، نويسنده , , S.J.C. and Benoit، نويسنده , , A. and Jin، نويسنده , , Y. and Camus، نويسنده , , Ph and Cavanna، نويسنده , , Denis A. and Durand، نويسنده , , T. and Etienne، نويسنده , , B. and Gennser، نويسنده , , U. and Grémion، نويسنده , , E. and Hoffmann، نويسنده , , C. and Leclercq، نويسنده , , S. and Ulysse، نويسنده , , Ch.، نويسنده ,
Abstract :
The use of a multiplexing system in close proximity to the detectors simplifies the electronics associated with large arrays of Low Temperature Detectors (LTDs). Here, we report the demonstration of an array of Quantum-Point-Contact High-Electron-Mobility-Transistors (QPC-HEMTs) down to 100 mK used to time multiplex the signal from 8 simulated high impedance LTDs ( ∼ 10 M Ω ) to an individual amplifier. Capacitors in parallel with the individual LTDs integrate the signal between measurements so giving a quasi-DC measurement of the LTDs. With the high impedance of the LTD this acts as a filter which counter acts the aliasing of the Johnson noise of the LTD associated with the time-multiplexing technique.
Keywords :
LTD , Low temperature electronics , Arrays of detectors , Readout electronics
