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Subject: Re: F.W. Rectifier vs. Env. Follower
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Date: Sat, 21 Sep 2002 09:38:31 GMT
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"Bill McKinney" schrieb im Newsbeitrag
> I'd like to convert a varying AC waveform (i.e. audio) to a varying DC
> control voltage to drive a VCA. I'm well aware I can use an envelope
> follower to do this, but I'd like to know if I can go even simpler.
> With this in mind, has anybody ever used a full-wave rectifier to create
> a control voltage from an audio signal? I've been testing the concept
> and it seems like it would work - I'm just curious if there any glaring
> disadvantages to using the rectifier circuit instead of the envelope
full wave rectifier, peak detector with adj. rise time constant(.2ms to
50ms) and adj. decay time(50ms to 2s).
Any analog compressor uses these features. You can add a limiter at the top
and an expander in the low region to suppress the noise.
You can also filter the control voltage and use a rms detector to get a
electronic hardware designer
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