Help me to create a switch using LTSpice

[iVenky]

I want to design a circuit in which the initial voltage of a capacitor is 3V. I thought I would use a switch which connects the 3V supply to the capacitor until t=0. After t=0 I would open the switch so that the initial voltage across the capacitor is 3V. How to do this in LTSpice? I mean how to create a switch like this in LTSpice? If you have any other idea or way regarding the initial voltage across the capacitor you can tell me.

Thanks in advance.

 

[goldsmith]

Re: Switch using LTSpice

Hello ivenky
Search "SW" in components .
Good luck
Goldsmith

 

[iVenky]

Re: Switch using LTSpice

Hello ivenky
Search "SW" in components .
Good luck
Goldsmith

I tried it. But it's having extra two terminals '+' and '-'. What should I connect to that? Besides I want to define that the switch should open at t=0. How should I do that?

Thanks in advance

 

[goldsmith]

Re: Switch using LTSpice

You should connect pulse signal to that .
( you can make it for transient time that you want .)
Best Lucks
Goldsmith

 

[_Eduardo_]

Re: Switch using LTSpice

If you have any other idea or way regarding the initial voltage across the capacitor you can tell me.

Initialize the Cap.

**broken link removed**

 

[iVenky]

Re: Switch using LTSpice

Initialize the Cap.

**broken link removed**

How do you initialize the voltage across the capacitor in LTSpice?
Tell me the procedure.

Thanks in advance

 

[_Eduardo_]

Re: Switch using LTSpice

At the same line where you enter the cap value, follow with IC=3

**broken link removed**

And check "Skip initial point solution"

**broken link removed**

That's all