Talk:Pulse wave

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Start[edit]

This didn't make much sense to me redirecting to heart pulse, given that Square_wave and Sawtooth_wave go to entries on their waveforms. The Square_wave article wasn't clear about the concept of a pulse wave, so I just threw this in. I don't have a good source of info that would result in a readable entry, so I left it as a stub.

Davetron5000 13:49, 21 June 2006 (UTC)[reply]

Lack of spectrum[edit]

I think adding frequency spectrum for this wave is good for adding.At Last ... (talk) 10:19, 24 November 2016 (UTC)[reply]

According to http://pages.uoregon.edu/emi/14.php the spectrum is determined by the duty cycle. Thus a square wave, with a duty cycle of 50% is missing every second member of the harmonic series, while a wave with a duty cycle of 25% is missing every fourth member of the harmonic series. Hyacinth (talk) 00:50, 4 May 2018 (UTC)[reply]

Sound[edit]

Hyacinth had added a large paragraph on the sound of pulse waves. Usually if we have a point to illustrate, we'll throw in a referenced quote to support that point. In this case we just have back-to-back quotes and it is not clear what the point we're trying to make here is. ~Kvng (talk) 14:02, 10 May 2018 (UTC)[reply]

What is unclear? Hyacinth (talk) 02:41, 11 May 2018 (UTC)[reply]

It wasn't clear enough for me to identify what was unclear :). It looks you've backed all this out. ~Kvng (talk) 12:43, 14 May 2018 (UTC)[reply]

You objected to cited article content, so I removed it. Your objection is that the material is too cited; what policy or practice is this based on? Unless the sources I cited where rambling insanely, they where all making points. It seems like if you read the quotes you object to you would notice the similarities between sources. Hyacinth (talk) 10:29, 19 May 2018 (UTC)[reply]

What is unclear about the following quote? "One of the most sonically pleasing and sought after sounds in synth history is created by modulating the [pulse] width with an LFO." Hyacinth (talk) 04:33, 22 May 2018 (UTC)[reply]

For one, you tacked that on the the end of a paragraph giving a technical description of the wave. Context is an issue. For two, there was a lot more you've done than this. Though it is not well organized, I can follow the stuff you're adding. I'm mostly confused about what you're trying to accomplish with these edits. ~Kvng (talk) 13:23, 24 May 2018 (UTC)[reply]

Fourier series without frequency?[edit]

The Fourier series expansion looks strange. I would expect terms with increasing frequencies, multiples of the fundamental frequency. But the argument to the cosine term, which includes the time variable t, has no frequency. It can be rearranged as 2π(τ/T)nt, where (τ/T) is the dimensionless duty cycle, and n is a dimensionless index. So where is the frequency to be multiplied by t?Elektrobjørn (talk) 09:19, 25 May 2021 (UTC) One day later: I corrected the formulas for the Fourier expansion, and changed the picture of the waveform to be symmetric around t=0.Elektrobjørn (talk) 08:55, 26 May 2021 (UTC)[reply]

factor of 2[edit]

I think that in the Fourier series expansions, there's a factor of 2 shouldn't be there. Can anyone confirm that? — Preceding unsigned comment added by 80.178.116.1 (talk) 14:43, 21 November 2021 (UTC)[reply]

Keep scope to just periodic pulse wave. Leave discussion of PWM and PAM for other articles.[edit]

Wikipedia already has an article for Pulse-width modulation and Pulse-amplitude modulation. So, I've trimmed this article down to only talk about the basic periodic pulse wave with a fixed duty cycle and amplitude. I'm only having mention of PWM & PAM in intro to say that they are modulating aspects of the pulse wave.

Thus, I've deleted the following text from this article's "Applications" section since it is out-of-scope:

In digital electronics, a digital signal is a pulse train (a pulse amplitude modulated signal), a sequence of fixed-width square wave electrical pulses or light pulses, each occupying one of two discrete levels of amplitude.^[1]^[2] These electronic pulse trains are typically generated by metal–oxide–semiconductor field-effect transistor (MOSFET) devices due to their rapid on–off electronic switching behavior, in contrast to BJT transistors which slowly generate signals more closely resembling sine waves.^[3] Em3rgent0rdr (talk) 21:57, 19 February 2024 (UTC)[reply]

I see similar text in Digital signal#In digital electronics. I don't really consider that first sentence correct, to be honest, so maybe that article needs to be correct. For instance, digital signals could take have more than two discrete levels of amplitude...e.g. PAMx, where x is an integer. Not a pulse train. And shouldn't really say square wave to be precise. Maybe could just say a digital signal is a pulse amplitude signal and leave it at that. Em3rgent0rdr (talk) 22:08, 19 February 2024 (UTC)[reply]

References

^ B. SOMANATHAN NAIR (2002). Digital electronics and logic design. PHI Learning Pvt. Ltd. p. 289. ISBN 9788120319561. Digital signals are fixed-width pulses, which occupy only one of two levels of amplitude.
^ Joseph Migga Kizza (2005). Computer Network Security. Springer Science & Business Media. ISBN 9780387204734.
^ "Applying MOSFETs to Today's Power-Switching Designs". Electronic Design. 23 May 2016. Retrieved 10 August 2019.

[1] B. SOMANATHAN NAIR (2002). Digital electronics and logic design. PHI Learning Pvt. Ltd. p. 289. ISBN 9788120319561. Digital signals are fixed-width pulses, which occupy only one of two levels of amplitude.

[2] Joseph Migga Kizza (2005). Computer Network Security. Springer Science & Business Media. ISBN 9780387204734.

[electronicdesign-3] "Applying MOSFETs to Today's Power-Switching Designs". Electronic Design. 23 May 2016. Retrieved 10 August 2019.

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