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Audio amplifier power supply design - Part 2: External supplies, inrush current & RF emissions

8/25/2010 07:51 AM EDT
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kendallcp
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re: Audio amplifier power supply design - Part 2: External supplies, inrush current & RF emissions
kendallcp   9/6/2010 10:51:41 PM
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If you're going to do this, it's a good idea to ensure that there's some local loss in the circuit. Otherwise, in between the series resonant impedance zeros of the individual capacitors, you'll get great big impedance 'poles' (peaks). If you're unlucky, these will significantly reduce the ability of your capacitor array to control certain frequency bands.

Dan Mitten
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re: Audio amplifier power supply design - Part 2: External supplies, inrush current & RF emissions
Dan Mitten   8/26/2010 4:12:07 AM
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When by-passing leads for RF, it's a good idea to use several capacitors in decade steps, in parallel, keeping the leads of each as short as possible to minimize inductance. Tricks like this will lesson the chance of accidentally designing in tank circuits!

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