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Why use two capacitors in parallel?

P

Peter

Jan 1, 1970
0
I saw a simple power supply schematic and the person used a 470uF
(polorized) and a 1uF (non-polorized) in parallel on the output of a
regulator.

I sent the person an email and he informed me he's seen it done that way on
other supplies (which I have too), but didn't know the reason.


Can someone explain this?


Thanks in advance!
 
J

J. B. Wood

Jan 1, 1970
0
Hello, all and from the IEEE Standard Dictionary of Electrical and
Electronics Terms:

"A phasor is a complex number. Unless otherwise specified the term
'phasor' is assumed to be used only in connection with quantitites related
to the steady alternating state in a linear network or system. Notes: (1)
The term 'phasor' is used instead of 'vector' to avoid confusion with
space vectors. (2) In polar form any phasor can be written Ae^jk(theta) or
A(angle theta) in which A, real, is the modulus, absolute value, or
amplitude of the phasor and theta its phase angle (which may be
abbreviated phase when no ambiguity will arise."

Hope the above provides some clarification and please excuse my font's
lack of properly showing exponential and Steinmetz notations. Sincerely,

John Wood (Code 5550) e-mail: [email protected]
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337
 
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