Abstract
Interfacing superconducting rapid single flux quantum logic with room temperature electronics requires the development of low-power semiconductor circuitry capable of operating at tens of Gb/s while maintaining sufficient signal to noise to achieve acceptable bit-error-rates. Such data-links must operate with sufficiently low power consumption to permit tens to hundreds of parallel channels to coexist in a single cryostat. This requires a careful trade-off between the power and noise performance of the cryogenically cooled digital amplifiers. Previously demonstrated ultra low-power cryogenic-to-room temperature digital data links have been limited to data rates on the order of a few Gb/s. In this paper we demonstrate a temperature distributed amplifier chain optimized for 30 Gb/s data transmission and consuming just 140 microwatts at 4 K.
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