Talk:Analog signal processing

What is analog signal processing?
How is analog signal processing different from analog circuits? What information could be presented in this article that wouldn't be covered in perfect versions of either Analog circ\\\\uit or Analog electronics? Did anyone ever use the term analog signal processing before the invention of digital signal processing?

These questions are either an argument for removal or merging of this article, or else ideas for improving the article, but I'm not sure which. -- The Photon 04:41, 29 June 2006 (UTC)

Major additions
Thank you to Drew335 who buckled down and put a fine article together. Great work! Binksternet 15:13, 8 October 2007 (UTC)


 * Yes. Next steps for the article would be to provide at least one inline citation for each substantive paragraph, and to add one or more pictures to the article.  Reader will find the article most useful if the references are tied more closely to each statement.  For the book references, I recommend using the cite book template and providing the specific page where the information could be found.  For web references, use cite web.  You can look at gamma ray burst as an example article.


 * When those steps are completed, this article could potentially be nominated as a good article candidate. - Jehochman Talk 10:46, 18 October 2007 (UTC)

Fourier Transform
I believe there is an error when talking about the Fourier Transform. When describing the inverse fourier transform, it should be 1/2pi. Don't use the star because the star has been used when defining convolution. Everywhere else in the article the terms are simply next to each other to represent multiplication. I'm currently in a signal processing class taking studying for my final. I'm using erhan kudeki's analog signals and systems ece 210 book as a reference. EE undergrad @ uiuc.edu —Preceding unsigned comment added by 130.126.160.118 (talk) 02:43, 9 December 2007 (UTC)

Why Laplace transform but not z transform ? ?
The choice of one transform (Laplace) but not the other (z transform) I believe gives the reader a misleading idea of what analog really is. This article is actually describing continuous-time analog signals. But equipment has been manufactured that utilizes discrete-time analog signals, which this article fails to even mention.

Discrete time analog is created by sampling an analog signal at regular intervals. Each sample however is never quantized in value, and so must be processed by analog cells. For example, a capacitor can be used to memorize one analog sample. (If each of the the analog values are then quantized, then the signal becomes digital.)

Conversion back and forth between discrete-time analog and continuous-time analog is mathematically lossless, where the losses occur only from the inevitable hardware imperfections, and so the information carried by both kinds of analog signals is identical. Therefore, discrete-time analog is every bit as analog as continuous-time analog.

An example of a past commercial product using discrete-time analog signals internally is some models of video time base correctors for industrial grade analog video tape playback, where the output signal can be mixed with other video signals in electronic video effects. The output also met FCC (federal communications commission) timing requirements for analog over-the-air TV broadcasting before the year 2009. The internal signal was sampled for bucket brigade time base correction, but each value was never quantized. The memory cells were analog cells.

The 'Z' transform works much more conveniently for these kind of discrete-time analog signals in exactly the way it works for digital signals.

Therefore, the recommendation is to include both kinds of transforms, or remove both kinds. Ohgddfp (talk) 22:00, 2 June 2015 (UTC)