We’ve been hard at work this summer developing a sister product to Signal Chain Explorer — a new product called Signal Wave Explorer. Much of the functionality presented Signal Wave Explorer will be incorporated into the first release of Signal Chain Explorer, our flagship product still in preview.
Signal Wave Explorer allows to you define a waveform in the time domain, pass it through various simulated circuits, and predict the output waveform in the time domain.
Time domain in, time domain out. Yet the program does its magic by doing frequency domain analysis, using Fourier Transforms.
In the example shown above, we’ve taken a pulse train of trapezoidal waveforms and passed them through a low pass RC filter. The resulting output waveform shows the start up transients as the capacitor charges more fully each pulse, and then, just before the output stabilizes into a steady state sawtooth-like wave form, the pulse train ends and the output decays to zero.
In other words, this tool is capable of capturing the total system response — transient and steady state, forced and free. We didn’t imagine this was possible using Fourier Transforms when we first started dreaming of this product. Yet, here’s proof it can be done.
Here’s another example where we pass a single 20 μS trapezoidal pulse through an active low pass filter inverter stage with capacitive load — a circuit that has a resonance at 16 kHz. See how the output rings!
We expect Signal Wave Explorer to be a valuable tool for both students and professionals alike. It’s easy to spend hours exploring different waveforms, circuits, and parameters, and being surprised at what pops out. This leaves you pondering what’s going on — a great hands-on way to learn how circuits behave.
It’s also a great way to learn about Fourier Transforms — for you can also see the frequency spectrums of the input wave, system, and output wave by checking the appropriate boxes on the GUI. For example, here’s the time domain wave and frequency domain spectrum of our single (aperiodic) pulse:
We can’t wait to make this new product available. It’s looking like a fall release, so stay tuned!