PULSE and PWL don't need timestep imposed -- but you decide how they behave A-devices are the best choice when it comes to switching, and using them with tau and tripdt should be the minimum for the best behaviour simulation-wise. Here are two examples ...
in a menu selection marked "controls". They may also have a minimum time step that you can specify, at the expense of possibly screwing up the accuracy of your results. Share Cite Follow edited Jul 4, 2019 at 0:01 answered Nov 10, 2018 at 0:49 TimWescottTimWescott 46.7k11 g...
Step 3: Set the Measurement Parameters A few more small directives are needed. First, the circuit must be in a steady state of the simulation (past startup) in order to make proper measurements. Adjust the t0, or start time for the measurement, and stop time. The start time can...
The plot results of our.step'ed .measdata. Figure 6. Output Voltage vs. Simulation Run The trace hows us that the results vary from a maximum worse case of 265mV (run 9) to a minimum worse case of 235mV (run 6) or roughly a ±6% error. This makes some intuitive sense...
(rawfile.get_raw_property())IR1=rawfile.get_trace("I(R1)")x=rawfile.get_trace('time')# Gets the time axissteps=rawfile.get_steps()forstepinrange(len(steps)):# print(steps[step])plt.plot(x.get_wave(step),IR1.get_wave(step),label=steps[step])plt.legend()# order a legendplt...
Looks more like numerical artifacts caused by SPICE trying to optimize for a minimum number of steps to compute, yet the duration is very long (20 seconds) and the digital circuit is millions times faster when compared with those 20 seconds.SPICE needs a little guidance in this situation...
6. Thus, the ripple current [p-p] is a minimum at <1% and >99% and maximum at 50% while the DC current is proportional to the duty factor. 7. To choose an appropriate capacitor for such a problem is a different question not asked but worth learning. We usually de-rate the cap ...
It works, but it requires several iterations and it may be time consuming, depending on the number of steps. I feel there must be a better way to do it using .measure, saving the iterations to a log and then looking for the minimum (that would allow me to set finer grain...
Based on this value, minimum L to cater both input voltage is 129.6µH. Hence, inductor with 130µH is selected in design. The last step of design is to determine capacitance (C) value of the capacitor to minimizing output voltage ripple. = ( / ) (7) C = Capacitance, micro ...
If the simulation includes a large number of Monte Carlo runs, the maximum and minimum errors reported in the simulation results can be interpreted as the worst-case error associated with resistor tolerance. For this simulation, we will leave R2 and R4 fixed at 100 kΩ; this prevents variati...