I am talking about low current PSU..about 50mA only to supply the OPamp.

Regards

Tal Bejerano
AMC - ISRAEL


-----Original Message-----
From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On
Behalf Of M. Adam Davis
Sent: Tuesday, June 04, 2002 4:09 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: Artificial Earth regarding switching PSU


A well designed SMPS should be ok.  You may want to look into the newer
switching regulators that operate in MHz as the output will be easie to
filter than those which operate in the kHz or hundreds of kHz.

Also keep in mind (be accutely aware) that an amplifier has a huge peak
current - your supply can be called on to supply 2-3 times the normal
operating current (and more) for brief instants.  Make certian your
supply can handle that - I suspect that's where most SMPS problems come
from when dealing with amplifiers.

-Adam

Vasile Surducan wrote:

>My friend,
>I've just made a synchronisation between your last two mails and I have
>a thought: never try to supply an analogic power amplifier from a
>swithching power supply, you'll be very dissapointed...
>
>best regards, Vasile
>
>
>On Tue, 4 Jun 2002, Tal Bejerano - AMC wrote:
>
>
>
>>Hi 2 All
>>
>>Are "Artificial Earth" can be made only if you build your switching PSU or
>>it can be made with other methods?
>>
>>Regards
>>
>>Tal Bejerano
>>AMC - ISRAEL
>>
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