Development of cryogenic readout circuits for superconducting tunnelling junction (STJ) direct detectors for submillimeter-wave is presented. Because of relatively large impedance of the STJs (/spl sim/10 M/spl Omega/ in a dark condition), it requires readout preamplifier with low current noise. Therefore, we chose readout circuit based on semiconductor field effect transistors for STJ readout circuit rather than superconductive quantum interferences device. A SONY n-channel GaAs junction field effect transistor (JFET) is a candidate for circuit elements of the preamplifier. We measured electrical characteristics of the GaAs JFETs at 0.3 K, and found that the GaAs JFETs work with low power consumption of a few microwatts, and shows good current-voltage characteristics without cryogenic anomalies such as kink phenomena or hysteresis behaviours. Furthermore, measurements at 4.2 K show the input referred noise is as low as 0.5 /spl mu/V//spl radic/HZ at 1 Hz. Based on these results and noise calculations, we estimate that a readout circuit with the GaAs JFETs has low noise and STJ detectors operate below background noise limit.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Cryogenic readout integrated circuits for submillimeter-wave camera


    Contributors:
    Nagata, H. (author) / Kobayashi, J. (author) / Matsuo, H. (author) / Akiba, M. (author) / Fujiwara, M. (author)


    Publication date :

    2005-01-01


    Size :

    1238503 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    FA1-4 Cryogenic Readout Integrated Circuits for Submillimeter-wave Camera

    Nagata, H. / Kobayashi, J. / Matsuo, H. et al. | British Library Conference Proceedings | 2005


    Millimeter And Submillimeter-Wave Integrated Circuits On Quartz

    Mehdi, Imran / Mazed, Mohammad / Siegel, Peter et al. | NTRS | 1995



    Novel Fabrication of Integrated Submillimeter Circuits

    Nye, K. W. / Xiao, Q. / Hesler, J. L. et al. | British Library Conference Proceedings | 2002


    Novel fabrication of integrated submillimeter circuits

    Nye, K.W. / Qun Xiao, / Hesler, J.L. et al. | IEEE | 2002