• on Audio/Video/Photography
  • Published in issue 7/2005 on page 0
About the article

Audio Click/plop Suppressor


Audio amplifier circuits with a single supply voltage have output coupling capacitors that produce audible clicking or popping sounds when the supply voltage is switched on, since they must be initially charged to half the supply voltage. Similarly, a clicking or popping noise can be produced by the discharge current when the supply is switched off.
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