LTSpice and Logic

[Mooly]

I wanted to use LTspice for a little circuit using logic but have run into a problem.

The output from the logic gates seems always to be either 1.00 volts or zero. In the "real world" the output would be determined by the supply voltage.

Here's simple circuit to show what I mean. How do I get the output to be a 5 volt or 10 volt (or whatever I want) level.

 

[repycte]

You have to add "Vhigh=5" (for 5V) in SpiceLine of the component.

 

[Mooly]

Thanks for that... I'll have play. Never tried using logic before in LTspice.

 

[Mooly]

Brilliant repycte, that works great... thanks.

 

[marce]

Get better results with a proper digital signal integrity software, but it dosn't come cheap.