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First Name:
YIN
Last Name:
ZENG
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Large-scale qubit readout in quantum computing
systems requires highly sensitive amplification with minimal
power consumption to reduce thermal load and preserve qubit
integrity. We propose a pulse-operated cryogenic low-noise am-
plifier (LNA) scheme that minimizes the influence from the LNA
on qubit operation and reduces power consumption by duty
cycling. A modified commercially available cryogenic hybrid LNA
based on InP HEMTs has been characterized to demonstrate the
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We proposed a novel method for direct characterization of transient noise and gain for a pulsed low-noise amplifier (LNA) with nanosecond resolution over a wide bandwidth.
The method employed a standard noise source and an oscilloscope to measure the time-domain output waveform of the LNA. Transient noise and gain of a gate-pulse-operated C-band LNA at two biases were measured with 50~ns resolution.
The method showed good agreement with static measurements.
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36 Views