Hello everyone

Is it possible to generate a real unit step function or it is only available in literature?

Is there an electronic circuit that generates such function?

Thank you in advance

 

Sure. An Lm3914 can make steps and the amplitude of the outputs are modified by resistor values so they add up as the chip moves from one step to another. This is not the only chip which can do this.

 

Is it possible to generate a real unit step function or it is only available in literature?

The unit step function has zero rise time and fall time, since it is the integral of the unit impulse which has zero width. It cannot be realized in a physical circuit.

 

The unit step function has zero rise time and fall time, since it is the integral of the unit impulse which has zero width. It cannot be realized in a physical circuit.

That's an aspect I didn't think of!
I interpreted the question differently.

 

The unit step function has zero rise time and fall time, since it is the integral of the unit impulse which has zero width. It cannot be realized in a physical circuit.

It is not important to have zero rise time in my application, I just need a circuit that changes from zero to specific voltage after a specific time and remains at the final value as long as the circuit is on

 

It is not important to have zero rise time in my application, I just need a circuit that changes from zero to specific voltage after a specific time and remains at the final value as long as the circuit is on

Oh. You said "unit step function," which has a very specific meaning in circuit theory. It sounds like what you need is a thing called a "time delay circuit." Google that phrase, and you should find plenty of examples.