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I usually just step a parameter: .step param R list 0.1 1k 1meg (Type "s" and put this in the "Edit Text on the Schematic" window that pops up) Now edit the load resistor's resistance value to be

The look-up table has been updated for increased precision. New zip uploaded. -- Regards, Tony

The look-up table has been updated for increased precision. New zip uploaded. -- Regards, Tony

This is my fault, my spreadsheet truncated the number of decimal places in the table. I'll upload a fixed version, presently. Interesting that it was previously accepted without error. -- Regards,

Hi, : I have uploaded the file named '20250318_bootstrap time-based triangle-wave generator for frequency sweep.asc' at temp.

Your are telling LTspice that you want the y-value to be 0.9088 *and* 0.9110 simultaneously at time 1ns. What would be the correct behavior here that universally applies to all use cases? Best

Hi, Same thing with 24.1.4 C:\Users\NAME\Documents\Simulation\ESD\IEC_61000-4-2_Test (1)\IEC_61000-4-2.inc(201): Monotonically increasing value expected. 1.00E-09,0.9088###> 1.00E-09<###,0.9110

Here is a corrected symbol subckt: * block symbol definitions .subckt lamp 1 2 .param lamp_voltage_rating = 120 .param lamp_power_rating = 20 .param start_temp = 20 .param Rstart ?=

Thanks for reply quickly. I tried again a and it works now. Thanks again! Hidehiko.

Is tstart defined? Put curly braces around the expression? Andy

I think I am finished for the day. I rewrote the device file using just a resistor and some equations, but I can't get passed this error "can't resolve .param r=rstart*(1+alpha*(t-tstart))". Files are

The difficult bit is deriving the temperature from the applied voltage, or? the filament current. However, I think you can use a 'backwards'? trick, by defining the temperature as the initial

Andy AWESOME !!! ?It works !! Thank you so very much! So weird that the text function creates a net, so I just mats a net with the OUT4 name and can probe that. This will be useful! Thank you! JD

I put this together. Hope you need it. R0 = lamp voltage rating^2 / power rating T0 = start temp T = temp alpha = temp coefficient of tungsten/filament material R=R0?(1+alpha?(T?T0))

If you model a filament lamp, I am learning you can model it as a resistor with a defined power capability.

Good point, I just did now :-)

Yes, the low Q of the Wien bridge is not good for low distortion. I intend to try out that MFB circuit when I get a chance. -- OOO - Own Opinions only If something is true: * as far as we know - it's

Have you asked ADI for one? -- This email has been checked for viruses by AVG antivirus software. www.avg.com

Is there a reason to adapt this file to your needs? You may want to start from scratch. I read a good discussion here: https://www.eevblog.com/forum/projects/electrical-model-for-incandescent-lamp/

Thanks for your help!