Class-B cable-driving SQUID amplifier. (arXiv:2011.11741v2 [astro-ph.IM] UPDATED)

Class-B cable-driving SQUID amplifier. (arXiv:2011.11741v2 [astro-ph.IM] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Kiviranta_M/0/1/0/all/0/1">Mikko Kiviranta</a>

We suggest a SQUID amplifier configuration with improved power efficiency,
for applications where cooling budgets are limited, in particular
superconducting detector array readouts in space observatories. The suggested
two-SQUID configuration keeps one SQUID in a zero-voltage state during a
half-cycle of the input while the other SQUID generates voltage. For the other
half-cycle the roles of the SQUIDs are reversed. The circuit is an
electrostatic dual of a transistor-based amplifier operating in class-B. A
proof-of principle demonstration at T = 4.2 K is presented.

We suggest a SQUID amplifier configuration with improved power efficiency,
for applications where cooling budgets are limited, in particular
superconducting detector array readouts in space observatories. The suggested
two-SQUID configuration keeps one SQUID in a zero-voltage state during a
half-cycle of the input while the other SQUID generates voltage. For the other
half-cycle the roles of the SQUIDs are reversed. The circuit is an
electrostatic dual of a transistor-based amplifier operating in class-B. A
proof-of principle demonstration at T = 4.2 K is presented.

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