Development of two prototype systems based on a high-T-c superconductor sampler

We are developing two prototype systems based on high-T-c superconductor (H TS) samplers for measuring high-frequency electrical waveforms. One is a di gital waveform measurement system in which high-frequency digital signals a re directly inserted into the sampler circuit via a 40-GHz frequency assemb ly. The system can reconstitute a 5.9-Gbps digital waveform. at 37 K. The o ther system is a current-waveform measurement system in which the signal cu rrent is picked up by a superconducting closed loop, and the waveform. is m easured by the sampler included in the loop. A sinusoidal waveform at 7 GHz was successfully measured using this system at 38 K. (C) 2001 Elsevier Sci ence B.V. All rights reserved.