Howto get the average voltage of a signal?

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How i will get the average voltage of a signal, its frequency is varying from 8K to 4Mhz?
 

averaging circuit

hmmm interesting
so if the signal frequency is not fixed then it makes it a non periodic signal right?

So you talking about average value of a non periodic signal?

What is your application exactly.. please share
 

averaging circuit

Hi,
Because the F-range is factor 500, is a simple integration not practicable...
I can think only on some peakdetecting/sample & hold, what is per (a free running oscillator)1KHz to zeroing?
Or if signal amplitude is enough high, you can count the pulses and after i.e. 10 reset the peak detector/S&H
K.

Added after 8 minutes:

Maybe a wideband (active) rectifier + SW-median filtering is the good solution?
 

Re: averaging circuit

This is for a TWT Helix current measurement, the PRF is varying from 8K - 4MHZ..
 


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