Capacitors in parallel - long puzzled me?
I have seen in loads of commertial circuits, published and derived by examination, with large and small capacitors in parlell, usually diferent types.
I know how to calculate paralell cap values, IE add them, and I apriciate that a circuit requireing a precice value may use multiple caps to acheve it but on the output of a voltage regulator surly this isnt the case.
I suspect it is something to do with the freequency responce and hence impedance, of the diferent types and sizes but havnt found a explanation 'simple enough' to get me started with understanding the concepts involved.
Can anyone give me a leg up so I have some hope of understanding the more complex info that ploliferates on the web and in the relavent data sheets.
I probably should have learned this years ago .... usually just play with values when building which is hardly efficiant or clever.
Thanks guys
Al
I have seen in loads of commertial circuits, published and derived by examination, with large and small capacitors in parlell, usually diferent types.
I know how to calculate paralell cap values, IE add them, and I apriciate that a circuit requireing a precice value may use multiple caps to acheve it but on the output of a voltage regulator surly this isnt the case.
I suspect it is something to do with the freequency responce and hence impedance, of the diferent types and sizes but havnt found a explanation 'simple enough' to get me started with understanding the concepts involved.
Can anyone give me a leg up so I have some hope of understanding the more complex info that ploliferates on the web and in the relavent data sheets.
I probably should have learned this years ago .... usually just play with values when building which is hardly efficiant or clever.
Thanks guys
Al
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