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Verilog-A control of temperature for single instances?

PistakioKernel

Hello!

I would like to make a verilog-A block that can read a signal and force the temperature accordingly. It works great with the function $cds_set_temperature but unfortunately this will edit the global temperature used for every instance while I would like to only edit the temperature of some blocks. Is there a way to modify this function so that it only changes some specified instance temperature?

The alternative I was trying is to use SKILL to access the instance and edit its own temperature parameter but I wasn't able to get it working during a transient simulation...

Many thanks and best regards,

Francesco

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  • Andrew Beckett

    Hi Francesco,

    I don't believe this is possible, and I've not seen any enhancement requests to do this so far. You'll need to contact customer support for such an enhancement to be filed.

    Andrew

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  • Andrew Beckett

    Hi Francesco,

    I don't believe this is possible, and I've not seen any enhancement requests to do this so far. You'll need to contact customer support for such an enhancement to be filed.

    Andrew

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  • PistakioKernel
    in reply to Andrew Beckett

    Hi Andrew, I though to make a short update that serves as closure for this point, and that could leave a reference if someone could be interested in doing something similar in the future.

    It was possible to do it in the following way: Place all the instances that need to be varied with temperature in a block and place this block n times where every nth-placement of this block has a fixed temperature offset. the whole n-blocks need to cover the full temperature range of interest. Then bring all signals going IN and OUT of this n blocks to a "verilog temperature multiplexer" which reads the temperature and combines the IN and the OUT signals mixing proportionally the signals coming from the 2 to the closest fixed temperature blocks. Clearly the IN temperature multiplexer has [IN] amount of inputs and [IN*n] amount of outputs, while the OUT temperature multiplexer has [OUT*n] amount of inputs and [OUT] amount of outputs where [IN] and [OUT] is the number of signals that need to go IN or OUT of the temperature depended model.

    To give quick example: let's take N = 3 with fixed temperature offsets of -50C, 0C and 50C (t range of interest in this case -50C to 50C). Let's say the temperature signal is 25C at a certain simulation moment. then the verilog multiplexer would take 50% of the signals coming from/to block at fixed 0C and mix with 50% of the signals coming from/to from block at fixed 50C. if the temperature is -10C it would take 80% form the block at 0C and 20% from the block at -50C. as the number n grows the accuracy of the mixed model increases.

    A bit laborious but working. Thanks for your feedback and best regards,

    Francesco

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