Talk:Clamper (electronics)

ambiguity
"a different dc level" is a very ambiguous statement, at least I don't understand it. Fresheneesz 21:29, 2 February 2006 (UTC)

correction - i do understand it, but don't know how to reword that. Fresheneesz 08:12, 8 February 2006 (UTC)


 * You mean its not very clear to you--Light current 01:30, 7 March 2006 (UTC)

Clipper?
"A different arrangement restricts the input waveform from going beyond a certain voltage."

Would this different arrangment happen to be a clipper rather than a clamper? Fresheneesz 08:12, 8 February 2006 (UTC)


 * I've seen the term "clamper" used for either circuit. - mako 08:25, 8 February 2006 (UTC)

So should that sentence include "This may also be known as a clipper. " ?? Fresheneesz 20:26, 8 February 2006 (UTC)


 * Maybe merge clipper here. - mako 20:40, 8 February 2006 (UTC)


 * The term 'clamping' implies to me that protection of succeeding circuitry is the prime purpose. Although the term 'black level clamp' was in use on earlier analog TVs to get a defined video dc level for the 'black' signal. In this case it probably would have had a level shift- but Id have to look it up to be sure.
 * The term 'clipping', OTOH implies, to me, chopping off part of a (generally) low power signal. For instance protection diodes across the i/ps of an op amp I would call clampers. Clipping is what happens in an audio power (or any other sort of) amp when overdriven. Clamping on its own does not(without the addition of a dc block or level shift change the dc baseline value of the signal). The difference is subtle, but perhaps the 2 pages could be merged, and the differences explained.--Light current 23:17, 6 March 2006 (UTC)


 * In Horowitz and Hill, a diode clamp is described thus:
 * Sometimes it is desirable to limit the range of a signal (ie prevent it from exceeding certain voltage limits) somewhere in a circuit. The cct shown will accomplish this (cct showing series resistor and shunt diode with cathode connected to +5v).
 * Sometimes it is desirable to limit the range of a signal (ie prevent it from exceeding certain voltage limits) somewhere in a circuit. The cct shown will accomplish this (cct showing series resistor and shunt diode with cathode connected to +5v).


 * Later in the chapter the following:
 * One interesting clamp application is 'dc restoration' of a signal that has been ac coupled.. THe fig shows the idea( cct showing series capacitor, then shunt diode with anode to ground.
 * One interesting clamp application is 'dc restoration' of a signal that has been ac coupled.. THe fig shows the idea( cct showing series capacitor, then shunt diode with anode to ground.


 * The term clipping is not mentioned in this chapter on Diode circuits.--Light current 02:14, 7 March 2006 (UTC)

Graphs
The graphs are slightly misleading. At no point will the output voltage U_A be negative by more than a diode drop for a positive unbiased clamp or positive by more than a diode drop for a negative unbiased clamp. Similar comments for all the other graphs. During a transient the output voltage will be clipped until it has risen (fallen) to the clamp voltage. — Preceding unsigned comment added by 81.99.43.47 (talk) 00:57, 2 November 2011 (UTC)
 * Indeed. 86.121.186.32 (talk) 03:24, 23 September 2015 (UTC)
 * I replaced the graphs. --Flexxxv (talk) 22:30, 22 November 2018 (UTC)
 * The original diagrams were much clearer. I suggest that you use the original diagrams as a template and just replace the waveform plots with the corrected ones (with thickened lines like in the original) leaving everything else as it is. SpinningSpark 23:05, 22 November 2018 (UTC)
 * I changed the line width and a little more. The current graphs use an ideal diode. This obviously ins't realistic. How about creating some more realistic graphs?--Flexxxv (talk) 12:38, 23 November 2018 (UTC)
 * A more realistic plot is probably beneficial. I don't think that the circuit diagrams should be made any more complex however. Keep those to just what is needed to explain the circuit in as simple a way as possible.  The basis of the plot can be explained in the description on the image page. SpinningSpark 16:36, 23 November 2018 (UTC)
 * The schematic will be the same. Just the plots will change due to the different characteristics of a real diode. — Preceding unsigned comment added by Flexxxv (talk • contribs) 17:09, 23 November 2018 (UTC)

Output voltage equations
In the calculation for the maximum output Voltage the diode forward voltage is missing. It should be V_out = 2*V_in - V_forward (as example for the positive unbiased case). — Preceding unsigned comment added by 134.169.177.116 (talk) 15:49, 29 January 2014 (UTC)


 * I totally agree that the diode voltage is missing but I disagree with the equations which are incorrect. They should be Vin+Vbias-VD for the positive clamper and -Vin-Vbias+VD for the negative clamper. I verified the equations with PSpice. The equations used is this article are completely off. I don't understand where the 2 multiplier comes from. Likewise, the equations for the unbiased circuits has the same problem. Vbias clearly drops off but the equations should be Vin-VD for the positive clamper and -Vin+VD for the negative clamper. The beginning of the "Types" section is also wrong because it shows an example based on wrong equations.


 * ICE77 (talk) 20:10, 6 August 2015 (UTC)

What is Bridge rectifiers
Bridge rectifiers 102.91.30.45 (talk) 13:14, 11 January 2022 (UTC)
 * They are bridge rectifiers. SpinningSpark 15:20, 11 January 2022 (UTC)