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Stray capacitance around high-speed OPAMP [Altium Delphi (E/J)]

It seems that there is a case where the characteristics do not appear
due to the effect of solid GND in high-speed OPAMP.

A customer has been told to leave a solid ground of 1mm from the pad
of the input part on the component side and solder side.
This seems to be due to the effect of stray capacitance.

I created a script to calculate the capacitance between conductors.

Stray_C_Scr.png

When calculated, it was a safe value more than one digit.

Stray_OP_Ex.png




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