Re: Need help with a circuit

From: John Popelish (jpopelish_at_rica.net)
Date: 12/29/04 

Date: Tue, 28 Dec 2004 19:40:48 -0500

Dark Alchemist wrote:
>
> Well, the posibilities of x would be a sine wave (for this test but
> could be anything in reality).
>
> If x <= 0 then y = 0 else if x <1 then y = sqrt(1 - x^2) is as far as I
> was able to simplify it.
>
> So, comparator A compares against 0 and comparator B compares <1 but we
> do not want the compare at B if A is true.
> This is as far as I got before my eyes started to glaze over, heheheh.

I am tinkering with a strictly opamp solution but I need some idea of
the DC accuracy you need, and the settling time or maximum frequency
you intend ot pass through this function. Keep in mind that at +-1
volt in, the gain is infinite. 

-- 
John Popelish