Fig. 6 | Scientific Reports

Fig. 6

From: Rapid single-flux-quantum and adiabatic quantum-flux-parametron cell libraries using a 1 kA/cm2 niobium fabrication process

Fig. 6

(a) Measurement waveforms of a JTL test circuit at 100 kHz in liquid helium. The input signal (high voltage: logic 1; low voltage: logic 0) is applied to the DC/SFQ converter, where an SFQ pulse is generated at the rise edge of the input signal. The output signal is observed by the SFQ/DC converter, where each rise or fall edge indicates a logic 1. The output signal was amplified by a room-temperature amplifier with a 40-dB gain. (b) Measurement results of operating bias margins, which are normalized to a bias voltage of 0.8 mV.

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