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extract the dc current

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shanmei

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The input current contains both ac and dc signal, how can I extract dc current, and only have ac current? Thanks.
 

Hi,

Not much specifications, mot much explanation...

DC is very, very, very low frequency...this is the difference to AC.
Although you don't say about your AC frequency...
I'd use a filter.

Klaus
 

The ac range is around 1MHz- 500MHz signal, maximum value is 20mA. DC signal maximum value is also 20mA range. Thanks.
 

If you want only the AC current - as you said in your 1st post, then a capacitor will block the DC and only let the AC thru ...
 
Series connected capacitors or transformer will block DC We are using this technology in audio amplifiers
 
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