2016年6月5日 · A waveform is a representation of physical quantity such as voltage or a current over time. If this physical quantity carries information then it is a signal. In practice, however, the terms signal and waveform are often used synonymously.

2016年9月6日 · Here's the full waveform. It's monotonic and the distortions are much less obvious. Note that the voltage here is 122 Vrms with a peak of about 165 V, slightly above the nominal range. Both this and the household mains show a peak voltage that's lower than what we'd expect for a pure sine wave with the measured RMS value. Here's the FFT.

Step_1: get a AWG - arbitrary waveform generator, typically based on computer-controlled DAC, with standard, say +-5V, output. Step_2: connect it to a power amplifier. For +- 250-V output you will need to design your own using big (and possibly cascoded) transistors at the output stage of an ordinary operational amplifier, just as LME49830 ...

The question of "sources of harmonics" is sort of a chicken and egg question. You can generate a waveform by combining harmonics, or you can generate harmonics by producing a waveform. Usually, the second meaning is what is used. The harmonics are generated by whatever process created the waveform.

2022年3月7日 · However it can be approximated with a narrow pulse. The accuracy of the approximation depends on the bandwidth of the circuit you want to analyze with the impulse. A reasonable rule of thumb is that the bandwidth of your circuit should be much less (say 1/10) than the reciprocal of your approximate impulse waveform.

\$\begingroup\$ A waveform dump file used by a waveform viewer conveys time - sequence and order fore signal transactions and signal value. It's uses include visual (manual) validiation, regression testing - when there is a way to compare dump files and troubleshooting when the design model behavior doesn't match the designer's anticipated ...

2018年4月16日 · That waveform that you have presented looks like what I'd expect for the current through one coil of a stepper motor in action. Nothing weird here. If you know the voltage across Nfa and you want to find the current through Nfa which is the same current that is flowing through the coil that is in series with Nfa.

2019年3月21日 · That signal encodes timing, brightness and colour for an entire line of video. It dates from the days of the CRT monitor which used magnetic deflection to scan the raster, hence the rather long horizontal retrace time (Changing currents in coils takes time), there is also a vertical retrace interval and a (rather longer) vertical blanking interval elsewhere in the sequence.

2021年4月1日 · The waveform on the first picture is correct. The hall effect devices are used to provide the timing to switch phases. You cannot swap phases without changing the halls; otherwise the motor phases will switch at the wrong time, and the direction of the motor rotor's torque change to the wrong direction when the hall signal change.

2022年3月21日 · Let us see if the SSB would make the waveform more interesting. The waveforms (real and imaginary parts) of a Hilbert transform of the 'pseudo raised cosine' modulation signal: The carrier, SSB modulated with this modulation signal, real and imaginary parts: And the Fourier transform perfectly resolves the lower side band and upper side bands: