ACWWong wrote on Jul 6th, 2006, 2:25am:the cccs needs a probe to be set before it can produce a current which equals current_gain*current_in_the_probe.
The probe is set in the "Name of Voltage Source" field to a voltage source you are using to monitor the reference current.
So if you put a instance V0 (a vdc @0V) between a differentail input, you can use the cccs to produce a current which is X time greater.
hope this answers your query.
Hi ACWWong,
Appreciate your help. Today I tried to build one according to your instruction (attached here). I don't know whether it is correct (most likely no?).
According to the schematic, if I want to sense the difference between the two constant current sources ( two sine waves with 180degree phase shift), I connect on vdc (dc=0v, instance=V1) in between and specify two cccs with vref=V1. But I feel I still miss something here.
In cccs properties, there is "Type of source", which has several options: cccs, and, nand, or and nor. I guess I should select "cccs" option. But how about the other three options? When I click one of the other three options, I find I need to specify the index of the probes.
What I would like to know is that whether I really need two cccs to build an ideal differential current amplifier ? Or I need one cccs enough with several probes selection?
Thank you for your time and help.
ethan