Simulation with Multisim

[zaphod_beeblebrox]

Hello, I need a help for a simulation with Multisim. I have to realize the following points:

1) Beginning from a square signal, +1 Volt and baseline at zero, realize a decreasing exponential signal with a time constant of 100 microsec;

2) Adding a variable gain amplifier, the signal must assume values between 1 Volt and 2 Volts (this point is to be realized with operationals);

3) The baseline must assume values between 0 Volt and 1 Volt (this point is to be realized with operationals).

I hope you will help me, I'm at the beginning with Multisim.

P.S. Sorry for my english!

[Tien_P]

Hi,

Have a look at the attache circuit, not sure if this is what you want.