At 02:39 AM 4/16/2003 -0700, you wrote:
>15V      .------.
>-----o---| 7812 |---o----> 12V
>          '--.---'   |
>               |      _|_
>               |      --- 470 uF
>             |       |
>            _|_     _|_
>
>
>This is the diagram I am using, the current draw out is 450 m-600 mA
>only.
>Any circuit improvement required to prevent output voltage oscillation ?


The output capacitor is optional for stability (it improves transient
response so you should use it), but you NEED to have an input capacitor
close to the regulator (from 15V to ground).

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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