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A high-efficiency superconductor distributed amplifier
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DOI：10.1088/0953-2048/23/2/022004.png)
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Abstract
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A superconductor output amplifier that converts single-flux-quantum signals to a non-return-to-zero pattern is reported using a twelve-stage distributed amplifier configuration. The output amplitude is measured to be 1.75 mV over a wide bias current range of +/- 12%. The bit error rate is measured using a Delta-Sigma data pattern to be less than 1 x 10(-9) at 10 Gb s(-1) per channel. Analysis of the eye diagram suggests that the actual bit error rate may be much lower. The amplifier has power efficiency of 12% neglecting the termination resistor, which may be eliminated from the circuit with a small modification.
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