HF current transformet calculating

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k.karel

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Hello for all,
I have line with sin 10MHz and current 0 - 1A rms this signal go over current sense transformer (Iron powder toroid) primar winding (2 turn) have induction 10nH, sec. winding have 10uH, on secundar is diode Greatz bridge and C + load resistor. viz picture.
What will be voltage on C1?
Is possible use ferite core on 10MHz?
 

Dear buddy
Yeah it is possible.
The voltage of capacitor will be A dc voltage.(if your voltage can going your diodes in forward bias( upper than 0.6 volt for silicon diodes.)
 

Yes. It is possible to use ferrite core. You should try to keep B value as low as possible (increase the turns). You can calculate the sec side voltage by calculating (primary voltage*turn ratio )-diode drop. I thing it should be around 19V approx
 

I'm pretty sure rectifying the current into such a large C and small R will give you a very bad reading. If you want a DC output, rectify the signal into a low value resistor, then put that through a high impedance lowpass filter.
 

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