importing measured i-v in spectre?

[Jan Mikkelsen]

Hi

I need to validate a transistor DC-model and to do this I would like to
include the measured i-v characteristic in my spectre simulation. I have
browsed through analogLib in search for a std. component for this but
with no luck.

Is is possible and if yes .. then how to do this?

Best,

Jan

 

[Andrew Beckett]

Jan,

From IC5033, you can define pwl controlled sources. For example:

//

curve (out 0 vin 0) vccs file="ivcurve.inp"
r1 (out 0) resistor r=1

v1 (vin 0) vsource dc=1

dc dc dev=v1 param=dc start=0 stop=5 step=0.1

save curve:1


The file ivcurve.inp contained i versus v data for the transistor curve I was
showing. So this gives you a voltage controlled current source with a transfer
function defined by the file.

Alternatively, you could use the "table" special function in the ADE calculator,
and read in the file and display it as a waveform (assuming you don't actually
need it in the simulator itself).

Regards,

Andrew.

On Mon, 19 Apr 2004 10:38:37 +0200, Jan Mikkelsen <jhm@NOSPAM.kom.auc.dk> wrote:

Hi

I need to validate a transistor DC-model and to do this I would like to
include the measured i-v characteristic in my spectre simulation. I have
browsed through analogLib in search for a std. component for this but
with no luck.

Is is possible and if yes .. then how to do this?

Best,

Jan

--
Andrew Beckett
Senior Technical Leader
Custom IC Solutions
Cadence Design Systems Ltd

 

[Jan Mikkelsen]

Hi Andrew

Excellent .. thank you very much

/Jan


Andrew Beckett wrote:

Jan,

From IC5033, you can define pwl controlled sources. For example:

//

curve (out 0 vin 0) vccs file="ivcurve.inp"
r1 (out 0) resistor r=1

v1 (vin 0) vsource dc=1

dc dc dev=v1 param=dc start=0 stop=5 step=0.1

save curve:1


The file ivcurve.inp contained i versus v data for the transistor curve I was
showing. So this gives you a voltage controlled current source with a transfer
function defined by the file.

Alternatively, you could use the "table" special function in the ADE calculator,
and read in the file and display it as a waveform (assuming you don't actually
need it in the simulator itself).

Regards,

Andrew.

On Mon, 19 Apr 2004 10:38:37 +0200, Jan Mikkelsen <jhm@NOSPAM.kom.auc.dk> wrote:


Hi

I need to validate a transistor DC-model and to do this I would like to
include the measured i-v characteristic in my spectre simulation. I have
browsed through analogLib in search for a std. component for this but
with no luck.

Is is possible and if yes .. then how to do this?

Best,

Jan


--
Andrew Beckett
Senior Technical Leader
Custom IC Solutions
Cadence Design Systems Ltd