A digital oscilloscope based on the principle of equivalent sampling

Ziyang Yu; Tao Liu

doi:10.1117/12.3033207

5 July 2024 A digital oscilloscope based on the principle of equivalent sampling

Ziyang Yu, Tao Liu

Proceedings Volume 13184, Third International Conference on Electronic Information Engineering and Data Processing (EIEDP 2024); 1318409 (2024) https://doi.org/10.1117/12.3033207
Event: 3rd International Conference on Electronic Information Engineering and Data Processing (EIEDP 2024), 2024, Kuala Lumpur, Malaysia

Abstract

For high-frequency periodic signals, this design is based on the principle of equivalent sampling, which greatly reduces the requirement for the sampling rate of the ADC chip and cuts down the cost of observing periodic signals. This design proposes a way to use STM32 to measure the frequency, control the AD9854 to output the clock signal of high-precision frequency to drive the ADS803 chip, and display the acquired signal on the serial screen. For frequency measurement, this design provides a high-precision temperature-compensated crystal for STM32 and AD9854, and uses equal-precision frequency measurement to measure the precise frequency of the signal. This accurate frequency is utilized to calculate the appropriate real-time sampling rate. In terms of signal conditioning, this design utilizes the OPA659 as an amplifier to make the 1Hz~20MHz signal attenuate and amplify normally. The measurement frequency range of this design is 10Hz~10MHz, the vertical sensitivity range is 10mV/div~2V/div, the real-time sampling rate is less than 1Msa/s, the equivalent sampling rate is more than 200MSa/s, and the scanning speed range is 100 ns/div~10ms/div.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ziyang Yu and Tao Liu "A digital oscilloscope based on the principle of equivalent sampling", Proc. SPIE 13184, Third International Conference on Electronic Information Engineering and Data Processing (EIEDP 2024), 1318409 (5 July 2024); https://doi.org/10.1117/12.3033207

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KEYWORDS

Design

Sampling rates

Oscilloscopes

Analog to digital converters

Clocks

Signal attenuation

Precision measurement

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