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On the performance of low-noise low-DC-power-consumption cryogenic amplifiers

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6 Author(s)
Angelov, I. ; Dept. of Microwave Technol., Chalmers Univ. of Technol., Goteborg, Sweden ; Wadefalk, N. ; Stenarson, J. ; Kollberg, E.L.
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The performance of broad-band low-noise low-dc-power-consumption cryogenic amplifiers have been studied in detail with emphasis on minimizing the power consumption and optimizing the amplifier performance at cryogenic temperature. A general approach is presented for the modeling and amplifier design, which helps in minimizing the power consumption and optimizing the performance of the amplifier. A noise temperature below 9 K and 22-dB gain was experimentally obtained in the frequency range of 4-8 GHz with a total power consumption of 4 mW with commercial GaAs transistors

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:50 ,  Issue: 6 )