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Question about ADS plots.

Question asked by solan on Aug 13, 2008
Latest reply on Aug 18, 2008 by dgun
Hi everyone.

My name is Solan and i have two question:

1. I want to simulate an active LP filter based on differential amp (AD8132).
Can you please direct me to a reference design or an ADS example.

2. I tried to make a simulation with the regular Op Amp and i encountered in the following problems:
    1. I realized that when i"m changing the output resistance of the amp,
        i"m getting different gain in the S(2,1) plots.
        I tried to work with the default values that the ADS suggests, but i   
        didn't get reasnable result.
        Can you please look at it and tell me what you think?

    2. The S(2,1) plots shifted in 90 degrees after a few simulation.
        I couldn't get it to the right way.
        Do you have an idea why it happened?

I"m attaching the design and the plots.
Hope to get answer soon

Thanks!

Solan.  

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