i am not understanding the concept of loop gain in a bistable multivibrator. can anyone explain it. how do u visualize loop gain in a bistable multivibrator?
this is based on the working of the circuit.
at some places they say tat loop gain has to be more for the working of a bistable multivibrator, at others, they say that it has to less.
which is the right sentence and why???
Show the source. Like I said, I do not believe there is such a thing as loop gain. When talking about digital circuits gain is not a factor. It is a 1, or a 0.
There are simple logics where a pure 1 and 0 can be a problem, such as diode logic. It works, but there are losses because there are no active components. With IC's this doesn't exist. The main thing for any logic family is to hit a "pure" 1 or 0 for the input, generally this does take some gain, but very little. The one thing a logic family should never do is easily operate in the linear region.
One the basic 1 or 0 requirement is met, it no longer matters, especially with bistable circuits. It sounds like you're text book is approaching it from the perspective of analog gain.
Just for laughs I typed the term loop gain in Wikipedia, here is what I got...
There the concept deals with the feedback loops used in amplifiers and other physical processes that use feedback loops.
I can see where such a concept might apply for a multivibrator of any sort. In the world of digital though, it is harder to apply. I'll step aside and see if anyone has better input.
can some one please help me, i'm not able to understand this concept of loop gain in a bistable multivibrator. wen its above 1, wat happens and how?? and the same for below 1.
Wouldn't the loop gain be a determining factor in rise/fall time of a particular device?? True, it would be internal to the device, but none the less it requires gain to perform the switching.