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Calculating the current from a transient simulation

Iaf22

Hello i'm simulating my circuit with a transient simulation and i wanted to calculate the current drawn for different temperatures. here i have some questions: is this current the total current or only the dynamic one? note that there's nothing changing in the circuit but a clock fed to some digital inputs. I tried using some functions in the calculator to get this current as a function of temperature like average but the problem is that the value changes with the transient time, also for the integ function, so i wanted to know which function should be suitable to estimate the current over the whole time not only the transient one.

  • Andrew Beckett

    Doesn't that rather depend on what you need to measure? If the current is indeed time-varying, then what does "calculate the current drawn" mean? You have to decide whether you want to measure the average, RMS, peak or some other definition of what a single current measurement would mean your block. Once you've decided what you actually want, then you can of course measure it.

    Andrew.

  • Iaf22
    in reply to Andrew Beckett

    Well, my aim is to calculate the total power of the circuit. I have also saved the power signal in my simulation

  • Andrew Beckett
    in reply to Iaf22

    That also needs definition - it could be the average power, total power over a particular time (which is the energy, of course, peak power, RMS power etc, etc.

    You could integrate it (using integ), you could take the average, you could find the yMax. As I said, it depends on what you really care about.

    Andrew.

  • Iaf22
    in reply to Andrew Beckett

    I have restrictions to the power consumed. I shouldn't exceed a total power of 100 uW so I thought that would be the average power while being on it means against infinite time that's why I was wondering if there's a way to calculate that

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