Difference - Bypass and Decoupling Capacitor

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senthilnathan.rajesh

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what is the difference between a bypass capacitor and a decoupling capacitor..?
 

Quoted from:
"Using Decoupling Capacitors"
https://hsi.web.cern.ch/HSI/s-link/devices/g-ldc/decouple.pdf

Regards,
IanP
 
see the common emitter with resistance in the emitter, the gain become maximum.
Bypass capacitor provides effective short to ac signal around the emitter reistance thus keeping the emitter at ac ground
 

emitter resistance in the comman emitter configuration tends to reduce the current gain hence capacitor is used to bypass it
while coupling capacitor is used to not to allow any dc voltage to the out put
 

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