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—This paper describes cryogenic broad-band amplifiers with very low power consumption and very low noise for the 4–8-GHz frequency range. At room temperature, the two-stage InP-based amplifier has a gain of 27 dB and a noise temperature of 31 K with a power consumption of 14.4 mW per stage, including bias circuitry. When cooled to 15 K, an input noise(More)
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