SpiceOpus lite version temperature variable

[mark]

I am using SpiceOpus lite. I am trying to create a voltage source with a
temperature dependence. Something on the order of

bsource 1,0 v=(1*temp)

anyone have any luck with this? I know that I can set the
temperature with

let @@@temp=100

and can sweep using

dc @@@temp 25 50 5

but SpiceOpus doesn't recognize

bsource 1,0 v=(1*{temp})
or
bsource 1,0 v=(1*{@@@temp})

Mark

 

[Jim Thompson]

On Fri, 27 Mar 2009 15:35:02 -0400, mark <markrwalter@sbcglobal.net>
wrote:

I am using SpiceOpus lite. I am trying to create a voltage source with a
temperature dependence. Something on the order of

bsource 1,0 v=(1*temp)

anyone have any luck with this? I know that I can set the
temperature with

let @@@temp=100

and can sweep using

dc @@@temp 25 50 5

but SpiceOpus doesn't recognize

bsource 1,0 v=(1*{temp})
or
bsource 1,0 v=(1*{@@@temp})

Mark

I don't know SpiceOpus, but a work-around that should work with all
Spice variants:

Current source driving a resistor, then E-source buffering voltage
across resistor... E-source output is the voltage source you needed.

Set your desired TC's in the resistor model.

I note, looking thru some old projects, that I used ETABLE to create
the boundary specifications for some 10K PECL designs. If SpiceOpus
can do tables, you could implement your voltage source that way.

...Jim Thompson
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[mark]

Jim Thompson wrote:

On Fri, 27 Mar 2009 15:35:02 -0400, mark <markrwalter@sbcglobal.net
wrote:

I am using SpiceOpus lite. I am trying to create a voltage source with a
temperature dependence. Something on the order of

bsource 1,0 v=(1*temp)

anyone have any luck with this? I know that I can set the
temperature with

let @@@temp=100

and can sweep using

dc @@@temp 25 50 5

but SpiceOpus doesn't recognize

bsource 1,0 v=(1*{temp})
or
bsource 1,0 v=(1*{@@@temp})

Mark

I don't know SpiceOpus, but a work-around that should work with all
Spice variants:

Current source driving a resistor, then E-source buffering voltage
across resistor... E-source output is the voltage source you needed.

Set your desired TC's in the resistor model.

I note, looking thru some old projects, that I used ETABLE to create
the boundary specifications for some 10K PECL designs. If SpiceOpus
can do tables, you could implement your voltage source that way.

...Jim Thompson
Jim,

Thanks. Right after I send in the question I came to the same conclusion.

Mark Walter