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Fast Audio Peak Limiter

2014-11-25 21:18  
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The circuit devised by Phil Allison still has some input voltage limitations, since it is based on a FET. Junction FET VCAs also create considerable distortion, with the worst of it appearing when the signal is attenuated by 6dB. The common way to fix this problem is to apply 1/2 of the drain voltage to the gate, along with the control voltage. Figure 1 shows the conventional way this is done. The predominantly second harmonic distortion is converted by this technique, to become a very much reduced amount of third harmonic distortion. visit page.Fast Audio Peak Limiter - schematic