Recent content by oujea

I already tried there but no luck, there is nothing with focus on mathematical background

Hello I'm teaching assistant at one university in Bosnia and Herzegovina (department for computer science) and I have recently been chosen to be an assistant at "Introduction to computer algorithms" subject. First few classes are based on mathematical background (induction, recursion, algorithm...

i found it too, but it did not explain it well...

A system is memoryless if the output at each time depends only on the input at the same time. A system is causal if the output at each time depends only on the input at the same time or on the prior inputs.

Hello Can someone please explain me how is system y(t)=dx(t)/dt non-causal and system with memory? I tried it using derivation definition, but I did not understand it. Also I'm interested in integral of x(T)dT (from -inf to to) - is it always causal and how? Do you have any literature or...

This is not rectifier, and link you posted did not help me because it shows 4 diodes in Graetz circuit (and it is rectifier), but circuit on my pic is voltage limiter.

the circuit on the picture is actually op amp limiter. here is it's characteristic:

Unfortunately I didnt find anything helpful (maybe because my english is bad, so I can't search for the right thing). I tried to analyse this, and I found that all diodes (D1, D2, D3, D4) are conducting when Uul is negative. but I'm not sure if I'm right.

I have to analyse how it works for different voltage Uul values. I have to find output voltage for all possibilities of the Uul voltage

Hello Can anybody help me determine where does current flow in the circuit on the picture below: How it goes when Uul is >0, and how when Uul is negative (<0). There is inverting OP AMP, and Uop will be >0 when Uul is <0, right? And how it goes then through diodes? Zener diodes here...