[sdiy] Best & fastest envelope follower schematic.. anybody ?

[Jean-Pierre Desrochers]

Hi all,

I’m looking for a fast and accurate voltage follower circuit.
There are plenty of them on the web to build but they all
suffer of inaccuracy and lag on the final DC output (final stage of low pass to smooth off the incoming peaks).
The incoming voltage will be a varying 0 to +/-5v peak.
I thought about implementing a solution using a small PIC with ADC/DAC
but even if these micros are very cheap this solution would be overkill.. would it be ?

So far the available circuits have too much lag on their DC output.
(The envelope takes too much time to get back to zero after a fast incoming peak)

Any known & reliable circuits ?

JP

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