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Query with regard to contribution operator (Read 1761 times)

Rosh

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Posts: 21

Query with regard to contribution operator
Jun 28^th, 2016, 12:12am

Here is my code :

Code:

`include "disciplines.vams"


	module test(in, out);
	input in;
	output out;
	voltage out,in;
	analog begin
		if (V(in)==0)
			V(out)<+1;
		else
			V(out)<+3;

		V(out)<+1;

		end


		endmodule

This is the resulting output

In the first edge:
In=5V and Out=4V

In the second edge:
In=0V and Out=2V instead of 6V.

Since the contribution operator accumulates signal values, shouldn't Out have a potential of 6V? (4V from the previous edge)

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Ken Kundert Global Moderator Offline Posts: 2384 Silicon Valley	Re: Query with regard to contribution operator Reply #1 - Jun 28^th, 2016, 11:57am The contribution operator does not accumulate over time. It adds together all of the contributions made to a branch at each instant in time. The starting point at each instant of time is not the previous value, it is always zero. I recommend you take a look at this tutorial. -Ken
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