???big help pls???

[misha14]

hey guys i need some help...im new to electronics world and i need some advices and teaching about some things.i need to build a decoupler circuit but i dont know how.what is a decoupler practically mean?and i need to block dc signals for my op-amp can you pls help me how?
thanks alot guys...

 

[slackjack]

Hi misha14,

I think you indirectly answered what decoupling means. It used to block dc signals i.e. it prevents the mixture of the ac and dc signals. In order to do this we can use a capacitor, which btw has an infinite resistance for dc, therefore it blocks it and lets the ac signal through.

It can be placed in series with the source (that needs amplifying) or at the output of each stage for a multi-stage amplifier.