Talk:Pulse-width modulation

message: See also, Error Diffusion?
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I have the impression that this article is somewhat messy. applications, methods and principle are mixed together. Maybe we could organize this : principle (make the average value of a rectangular signal vary by modifying its duty cycle), applications (I'm a power electronics guy, so I only know applications in this field), methods to generate the pwm (like in the figure I added, but there are other)
What do you think?CyrilB 09:43, 24 March 2006 (UTC)
thread_title: Untitled

message: This article needs to be extended especially voltage regulation section.
PWM controller can be used in AC-DC as well as DC-DC conversion.I'll add some text in the voltage regulation  and u can get some idea
Kundojjala 17:32, 24 May 2006 (UTC)
thread_title:  PWM Controllers 

message: There is no mention of natural and uniform sampling. A complete discussion of PWM would include these two different methods of implementing PWM (and information, perhaps, about the frequency-domain consequences). --TedPavlic | talk 18:35, 18 February 2008 (UTC)
thread_title:  Natural and Uniform Sampling? 

message: The introductory statement is misleading: "Pulse-width modulation uses a square wave whose duty cycle is modulated". If you modulate the duty cycle (ie. freedom to move both the positive and negative edges, only ensuring that the ratio pulse width to pulse period matches the modulated signal) then you have duty cycle modulation. Pulse width modulation fixes one of the edges so you have a fixed period, and varies only the pulse width. The correct statement should be "Pulse-width modulation uses a square wave whose pulse width is modulated", but my change keeps getting reverted...  —Preceding unsigned comment added by 129.215.215.162 (talk) 15:20, 1 April 2008 (UTC)
replies: text: Try to use edit summaries, and mention that you'll be adding your reasoning to the talk page. As far as I could see, you were removing valuable context from the article with no clear explaination. Yngvarr (c) 15:22, 1 April 2008 (UTC)
thread_title:  Pulse Width Modulation vs Duty Cycle Modulation 

message: What's the point of learning about synths if you can't hear it?  —Preceding unsigned comment added by 75.57.186.23 (talk) 20:41, 27 November 2008 (UTC)
thread_title:  This needs an mp3 sample 

message: Almost all the servos I've seen are controlled by a PWM signal. Why is it, then, that this article doesn't even mention the word "servo" once? Salvar (talk) 14:01, 6 June 2009 (UTC)
thread_title:  Servos? 

message: I strongly suspect that PWM amplifiers are used for the earphone/speaker in a cell. phone, to economize on battery power. However, I'm not sure, so I didn't add such a comment. Nevertheless, if true (likely), this must be the most commonplace application of PWM technology.
Regards, Nikevich (talk) 09:38, 26 July 2009 (UTC)
thread_title: Class D amplifiers used in cell. phones?

message: They work on both half-cycles, unless I'm quite-badly misinformed. (Fairly sure a typical triac dimmer switches on at a variable point, and switches off when the load current comes close to zero.)
Regards,
Nikevich (talk) 09:38, 26 July 2009 (UTC)
thread_title: Lamp dimmers at 2x power line frequency

message: According to this source pulse-width modulation is deprecated terminology, preferring pulse-duration modulation.  Does anyone know if this is officially deprecated and by whom? The term pulse-width was certainly standard in my day but pulse-duration certainly now seems to have growing popularity. SpinningSpark 16:53, 31 January 2011 (UTC)
thread_title:  Deprecated title? 

message: I am confused about the use of the term "carrier frequency" in this section: "Pulses of various lengths (the information itself) will be sent at regular intervals (the carrier frequency of the modulation)."  My understanding of the term "carrier frequency" is that it is the frequency at which a transmission is broadcast, e.g. tuning your radio dial to 88.5 MHz.  The carrier frequency is typically much higher than the frequency of the frequency of the transmitted information.  The regular intervals the article refers to seems to me to correspond more to a "pulse repetition frequency", or the inverse of the frame rate or update rate.  I do not understand how the two concepts (frame rate and carrier frequency) are analogous or related. Jfalesi (talk) 02:58, 13 October 2016 (UTC)
thread_title:  Carrier frequency? 

message: I did not find any section mentioning modern types od PWM e.g. "Selective Harmonic Elimination PWM" or "Space Vector Modulation" used everywhere in high power motors nowadays... 95.105.237.40 (talk) 08:53, 18 September 2022 (UTC)
thread_title:  NO mention of modern types of PWM ???