LFO

[Tony Clark]

> Are there any one who can suggest about a OP amp
> that have rail to rail swing at the output.

   Sure, try National's LM6132 or TI's TL2272

> I have LFO design thats running on +5V and -5V supply.
> So there are urgent need for this OP amp.
> Im running the design on an LMC662 Cmos, but im not pleased by
> the performance, the Cmos seems to have some strsnge behavior,
> since this design are a variable wave cirquit the LMC662
> are clocking a 4066 for charge/discharge for the reversal of
> the wave,thers no hevy capitanc load on the LMC660.

   My latest circuit design for my company involved using a R-T-R op-amp, 
and I can tell you I learned a few things about designing with one of 
these things.  They do NOT like to drive low impedance inputs, nor do 
they like to drive high capacitive loads.  If either of these two 
situations are present, they'll self oscillate like you can't believe.
   Generally if you can keep input impedance above 10K then you should be 
okay.  I also suggest putting in feedback capacitors to help maintain 
good phase response.
   I'm not quite sure what you are trying to do with your circuit, so I'm 
not sure if I've given any good hints or not.  Hope it helped though.

   Tony

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I can't drive (my Moog) 55!
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Tony Clark -- clark at andrews.edu 
http://aupe.phys.andrews.edu/~clark
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