8 GHz Sampling Oscilloscope for experiments

8 GHz Sampling Oscilloscope for experiments

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A basic open-source multi-GHz sampling oscilloscope for experimenters on a budget. Still a work-in-progress, with key pieces on separate PCBs, but showing bandwidths in the 7-8 GHz range with >= 100 GSa/s equivalent-time sampling, and around 500 k comparisons/second real time. by Ted Yapo @ hackaday.io

This particular project uses a latched comparator as a voltage sampler, specifically the ADCMP582 from Analog Devices. Built on SiGe, this $20 (single-quantity) comparator has a sampling aperture of 5 ps, and a typical front-end bandwidth of 8 GHz. This ultimately limits the bandwidth of the resulting instrument, but other factors in the current design reduce the system bandwidth into the 6 GHz range. Very preliminary tests estimate the rise time of the scope to between 50 and 70 ps, corresponding to between 7 and 5 GHz bandwidth, respectively. I’m calling it 6 GHz for now, and I expect it can be improved somewhat,

8 GHz Sampling Oscilloscope for experiments – [Link]

About mixos

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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