Hspice code error - **error** negative node number found

[lokesh garg]

Hspice code error

**error** negative node number found
tokin number= 9
this is the error coming when i am running this code

vin 1 0 dc 5v
G12 1 2 poly 1 0 0 1.4783676e-009 -3.9434654e-009 3.6185472e-009 -1.1063002e-009
G23 2 3 poly 2 0 0 1.4783676e-009 -3.9434654e-009 3.6185472e-009 -1.1063002e-009
G36 3 6 poly 3 0 0 1.4783676e-009 -3.9434654e-009 3.6185472e-009 -1.1063002e-009
G14 1 4 poly 1 0 0 1.4783676e-009 -3.9434654e-009 3.6185472e-009 -1.1063002e-009
G45 4 5 poly 4 0 0 1.4783676e-009 -3.9434654e-009 3.6185472e-009 -1.1063002e-009
G56 5 6 poly 5 0 0 1.4783676e-009 -3.9434654e-009 3.6185472e-009 -1.1063002e-009

Vx 6 0 dc 0v
.op
.probe
.option post
.end

How to crrect this error.

 

[keith1200rs]

Hspice code error

I am not sure of the Hspice syntax, but I think you have an odd number of data pairs. I think after "POLY" the next two values are the input nodes, then it is data pairs.

Keith.

 

[lokesh garg]

Re: Hspice code error

if i am using even no. of data points, error is still comming....

 

[keith1200rs]

Hspice code error

Are you actually using Hspice or Pspice? The syntax of the G Poly source various from one Spice variant to another.

In My simulator (SIMetrix) the following works:

G12 1 2 poly(1) 1 0 0 1.4783676e-009 -3.9434654e-009 3.6185472e-009 -1.1063002e-009

The poly(1) defines how many input connections there are.

Keith.

 

[lokesh garg]

Re: Hspice code error

i am using Hspice(synopsys) this time.....

 

[keith1200rs]

Hspice code error

Looking at the Hspice manual, you need the poly(1) definition as I mentioned above. From the Hspice manual:

Polynomial dimension. If POLY(ndim) is not specified, a
one-dimensional polynomial is assumed. Ndim must be a
positive number.

Ignore my comments earlier about data pairs - I was mixing up POLY & PWL!

Keith.