mg777 wrote on Feb 1st, 2007, 8:58pm:You've got positive feedback for either sign of A, so I'd be cautious about a linear anaysis. Is this a memory cell?
As far as linear analysis goes: if the amplifiers are ideal then the time constant is likely to come from the r
0, so I'd go with your second circuit. BTW, you may want to write the A = -g
mr
0.
M.G.Rajan
www.eecalc.com hi mg777,
Thanks for the reply.
Would u pls. elaberate your explaination a bit more?
It is just a demonstration diagram, it would not be a positive feedback. And it is not a memory cell also.
Because the cap C is tied to the two amplifiers both, I was puzzled how to break the loop to do the stabilty analysis. I have concerns that the miller effect will disapear for one amp if breaking the loop. So my puzzles is in fact if the cap is miller equivalent for one amp, it would be miller equivalent to another amp simultaneously? Or put another words, the same cap can be miller equvalented twice simultaneously in one block?
Thanks in advance