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Chip Amps Amplifiers based on integrated circuits

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Old 16th November 2005, 07:43 PM   #11
Join Date: Mar 2003
Location: Lisbon, Portugal
Originally posted by youyoung21147
OK, I see.

So the main aim of a CRC PSU is to protect components from current surges, overload, etc...
No, it's not!
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Old 17th November 2005, 04:39 PM   #12
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OK, so I have another idea (see the high cap PSU thread for details)

Why not use a choke instead of the resistor ?

It would have the same resistance, and it would moreover reject the HF rubbish ! It could also work as an energy storage device, but maybe it is not a good effect for the circuit.
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Old 18th November 2005, 04:50 PM   #13
Tweeker is offline Tweeker  United States
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Location: Cincinnati, Ohio
The main reason you dont see this more is chokes tend to be expensive. If your using an air core you need to be carefull it doesnt radiate noise into your signal, but this can work very well. Also the coil will get hot if not of sufficient gauge.
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Old 18th November 2005, 05:18 PM   #14
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OK I see the problem with the price.

My PSU is in a separated metal housing, but it may perturbate the PSU itself. Does a choke radiates like a trafo, through the center ?

Also, the use of ferrite beneath the coil increases the inductance very much, like in a trafo. But ferrites tend to saturate above a given current.

Is there a formula for calculating the max intensity the ferrrite can handle ? I didn't find any on the net
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