Hello,

I want to do AC analysis and transient analysis for an analog cicuit. I'm facing a problem for my source parameters. I can find two AC sources. In the menu "place"--> "PSpice component"-->"Source"-->"voltage sources".  There I have "AC" and "Sine"

Now, for the "Sine" source, I can set 4 parameters. 

       - VOFF for the offest i figured

       - FREQ for the frequency

       - VAMPL and AC. And I don't know what these are for and the difference between the two. 

The second source is "AC" and here i can parameter the "Vac" and "Vdc" which must be the DC votltage and AC voltage. I'm guessing that this source is for AC sweep simulations.

I'm using Cadence Allegro Entry CIS 17.2-2016

Thanx for your help!