# Tag Info

Accepted

### Why do we use step response?

Step response and transfer function are interchangeable via Laplace transform (step response -> differentiate to get impulse response -> laplace -> transfer function), but you can't run a Laplace ...
• 79.8k
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### over and critically damped systems settling time

TL;DR: NO, you can't use the underdamped settling time formula to find out the settling time of an overdamped system. And you can't use it for a critically damped system either. LONG FORM answer ...
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### Is there an English word for the output response of a non-minimum phase system?

I've always heard that being called undershoot. And, in this Control Systems magazine article on Nonminimum-Phase Zeros they also call it initial undershoot.
• 2,617
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### Is there an English word for the output response of a non-minimum phase system?

I think the correct term in English would be “initial inverse response”. The system initially does the opposite of what is commanded. For example, in this book. So it’s even worse than a dead time ...
• 409k

### Why do we use step response?

An impulse, i.e. hit it with a hammer, is not very friendly, particularly in systems that have mechanical bits and pieces. A perfect impulse cannot be generated, so you have to tailor the pulse ...
• 7,636
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### How to analyze a capacitor connected to a DC voltage directly (no resistor)?

Good question. If you connect an IDEAL voltage source to an IDEAL capacitor you get exactly the situation that you describe. The IDEAL answer is that there will be an INFINITE amount of current for an ...
• 2,035

### RC filter impulse response is exponential decaying but inverse Fourier is Sinc function

Here's the short answer: a first-order lowpass and a rectangular-in-frequency filter don't look the same in the frequency domain. So why should they be the same when you take the inverse Fourier ...
• 46.7k

### In a bandpass filter, when a square wave is applied into the input, why is the output a sine wave?

A good square wave will be composed of many harmonics at increasing multiples and decreasing amplitudes of the fundamental frequency. As you start to "filter" out the upper harmonics you ...
• 10.5k
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• 21.6k
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### High pass filter: Overshooting before attenuation

First the output signal surpass the input signal (overshoot) Initially the output signal follows the input exactly and goes up by the same amount relative to their current baselines. However the ...
• 56.7k
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### Graetz diode bridge with series LC circuit oscillation problem

It's easier to see if you set the minimum time step to a much lower value like 10ns. When power is applied, the diodes conduct and the LC circuit does a half-cycle oscillation, until the inductor ...
• 79.8k