We designed, simulated, and experimentally demonstrated components for a microwave-
frequency digital-to-analog converter based on single flux quantum (SFQ) circuits and an
amplifier based on superconducting-quantum-interference-device (SQUID) stacks. These
are key components for a self-calibrated programmable waveform reference for
communications metrology capable of synthesizing high-frequency signals with
quantumbased output accuracy. The amplifier is an SFQ voltage multiplier circuit that …

We designed, simulated, and experimentally demonstrated components for a microwave
frequency digital-to-analog converter (DAC) based on rapid single flux quantum (RSFQ)
circuits and a superconducting amplifier based on SQUID stacks. These are key
components of a self-calibrated programmable waveform reference for communications
metrology capable of synthesizing high-speed signals having output with quantum-based
accuracy. The amplifier is an SFQ voltage multiplier circuit that consists of a network of SFQ …