[sdiy] FW: Op-Amp with good PSRR

[Phil Macphail]

Sorry, I intended to send this to the list rather than Tony,

Phil.

Phil.

On 15/03/2012 22:15, "Phil Macphail" <phil.macphail at liivatera.com> wrote:

>I'm guessing that you want a higher PSRR....
>Depending on the frequency range you want the rejection over, there is
>nothing better than giving the amplifier a local regulator - splitting
>the 
>rejection budget is far more effective than trying to achieve it all in
>one place. The regulator could be as simple as an emitter-follower with
>an 
>R-C connection to the base from the supply.
>
>Phil.
>
>On 15/03/2012 19:25, "Tony Rolando" <tony at makenoisemusic.com> wrote:
>
>>Hello, I am in need of an dual op amp that has a low Power Supply
>>Rejection Ration (PSRR). A slow op amp is fine. Right now I am using a
>>LM358, and the problem I am having is that a best case scenario the
>>LM358 works good, but several of the LM358 do not. The data sheet shows
>>the spec as Typical 100db and Minimum of 60db for LM358.
>>
>>Does anybody have a suggestion for something I could drop i place of the
>>LM358 that might have better rejection?
>>
>>Thanx,
>>
>>Tony Rolando
>>Make Noise
>>http://www.makenoisemusic.com
>>
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