Design of wide dynamic range current measurement card

Jingxi Guo; Denghong Zhang

doi:10.1117/12.3032793

5 July 2024 Design of wide dynamic range current measurement card

Jingxi Guo, Denghong Zhang

Proceedings Volume 13184, Third International Conference on Electronic Information Engineering and Data Processing (EIEDP 2024); 1318411 (2024) https://doi.org/10.1117/12.3032793
Event: 3rd International Conference on Electronic Information Engineering and Data Processing (EIEDP 2024), 2024, Kuala Lumpur, Malaysia

Abstract

Beam intensity is a fundamental parameter of beam flow. The beam intensity measurement system of the Heavy Ion Medical Machine (HIMM) requires a wide dynamic range current detection card to monitor the beam intensity. The card will receive the current signal and integrate it within the fully differential current frequency converter (FDCFC). A voltage comparator is employed to check the output against the threshold and control the current integrate direction. The input current signal is transformed into a TTL signal by integrating and changing current direction between the differential pairs. The card utilizes a high slew rate differential amplifier and a multi-switch, and the current is integrated in different branches of pairs. The laboratory tests show the following results: The fully differential current frequency converter performs effectively, with an input dynamic range covering 1nA to 10mA, a nonlinear error of less than 15%, and an output frequency ranging from 100Hz to 200kHz, meeting all the design goals.

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

Citation Download Citation

Jingxi Guo and Denghong Zhang "Design of wide dynamic range current measurement card", Proc. SPIE 13184, Third International Conference on Electronic Information Engineering and Data Processing (EIEDP 2024), 1318411 (5 July 2024); https://doi.org/10.1117/12.3032793

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KEYWORDS

Capacitors

Circuit switching

Design

Switches

Signal detection

Interference (communication)

Data transmission

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