Combining Signals of Hall Sensor & Rogowski Coil

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The discussion revolves around combining signals from a Hall sensor and a Rogowski coil using a specific circuit design. The circuit features two operational amplifiers, where the upper amplifier (A2) processes the AC components from the Rogowski coil, while the lower amplifier (A1) integrates the DC component from the Hall sensor. The goal is to achieve a balanced output voltage that reflects the combined signals, with specific resistor and capacitor values selected to ensure appropriate amplification and time constants. Participants discuss the importance of matching time constants for effective signal processing and the challenges in determining component values for optimal performance. The conversation highlights the complexity of the circuit design and the need for careful consideration of frequency response and integration in achieving desired outcomes.
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@Glenn Emmers Considering the time/effort expended on this project, a commercially available Rogowski probe that covers your full frequency range should be investigated. Here are some links for wideband ones that may help. (No Hall device needed unless you need DC.)

Some explanation from the Government Printing Office:
(On page 175 et seq. of 428)
https://www.gpo.gov/fdsys/pkg/GOVPU...VPUB-C13-6fc54876ae3cb5ad69ab9d43094650f8.pdf
Here is a link to reference [7] in the above. It is behind a $30 pay wall so I haven't looked at it.
Review of Scientific Instruments 51, 1535 (1980); https://doi.org/10.1063/1.1136119

User Guide:
https://www.keysight.com/main/redir...ey=2925114&lc=eng&cc=US&nfr=-32553.1229528.00

Data Sheet:
https://www.keysight.com/en/pd-2877...23-mhz-3000-a?nid=-32553.1229528&cc=US&lc=eng

Selection Guide:
https://www.keysight.com/en/pc-1000000101:epsg:pgr/oscilloscope-probes?pm=SC&nid=-32564.0&cc=US&lc=eng

("Keysight" used to be "Agilent" used to be "Hewlett Packard")
 
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