Ripple removing in method in filter

Replies

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  arunchary

  we know about capacitor, when it is placed in shunt with respect to ground to the circuit,it is so called bypass capacitor which is used specially to remove ripples before and after voltage regulator....before regulator rectifier is able to produces the rippled dc, total distortion is not remove but it is minimized the ripples ...so here capacitor is considers as a filtering unwanted signals.
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  arunchary

  
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  Jeffrey Arulraj

  So one question why is that we are using a bypass capacitor in the input side as well here
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  Ramani Aswath

  A capacitor absorbs a rising voltage getting charged up in the process. If there is no load on the output the capacitor will get charged to the peak voltage and hold that. However, if there is a load, depending on the load there will be an average voltage with a ripple riding on that. The ripple wave form need not exactly match the incoming wave form.
  
  In the circuit shown, the input capacitor reduces the output ripple, which is further smoothed by the output capacitor.
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  Jeffrey Arulraj

  Just a way of cascading the filters then right Sir #-Link-Snipped-#
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  Ramani Aswath

  jeffrey samuel

  Just a way of cascading the filters then right Sir #-Link-Snipped-#

  Somewhat. But it is more than that. A voltage regulator does control the voltage excursions. Using the capacitors in the manner shown leads to a better regulated output than if only the two capacitors were used. Also the size of the capacitors will be considerably less if used as shown for the achieved output stability.