What are the functions of a buffer?

 

:shock: You're going to have to be more specific. Are we talking about a data buffer, a buffer circuit, or the white fuzzy thing attached to a motor used for polishing cars? :roll:

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If this is not what you expected, please alter your expectations.

 

what are the functions of a buffer circuit?

 

Well depends on what it's used for, if it's an Audio buffer, it's used to control the volume of the sound so as not to blow a speaker.

If you are reffering to a different kind, please specify, but most are used just to keep a circuit from peaking/overloading and breaking.

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E=MC^18357891237358179238, it\'ll still come out right every time. Try it some time, it\'s all relative to the equation.

Take that Einstein.

 

are buffers used for impedance matching?
are there more uses of such a circuit?

 

Buffers are interposed between a source and a load that the source is not able to drive directly, i.e., when more current is required than the source can provide. You could call this impedance matching in a general sense. The more common meaning of "impedance matching" is to create a source impedance that equals the load impedance, in order to provide maximum power transfer, minimize reflections on transmission lines, etc.