Atkinson index - Revision history

en>Gro-Tsen: /* Definition */ Provide an alternative phrasing of the definition with a much needed link to generalized means

2015-01-08T23:46:46Z

Definition: Provide an alternative phrasing of the definition with a much needed link to generalized means

← Older revision		Revision as of 01:46, 9 January 2015
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92.206.78.11: /* References */

2014-03-01T16:45:24Z

References

← Older revision		Revision as of 18:45, 1 March 2014
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	~~{{orphan\|date=September 2008}}~~		Andrew Simcox is the title his parents gave him and he completely loves this name. What me and my family members adore is bungee jumping but I've been using on new issues recently. Some time in the past she chose to live in Alaska and her parents reside nearby. Credit authorising is where my primary income comes from.<br><br>Feel free to visit my webpage [http://ustanford.com/index.php?do=/profile-38218/info/ clairvoyant psychic]

	~~'''Voltage [[Droop_(control)#Droop\|droop]]'''~~ is the ~~intentional loss in output [[voltage]] from a device as it drives a load~~. ~~Employing droop in a [[Voltage regulator\|voltage regulation circuit]] increases the headroom for load transients.~~


	~~Although it may seem counterproductive, a series resistor is included between the regulator output~~ and ~~the load. The resistance needs to be chosen so that at maximum output current, the output voltage at the load is the minimum acceptable. Conversely, when the output current is (near) zero, the voltage~~ is ~~near the maximum. This follows simply from [[Ohm~~'~~s law]]~~. ~~The behaviour of~~ the ~~system with~~ and ~~without the added droop resistor is as follows:~~

	~~[[Image:Droop behaviour~~.~~png]]~~

	~~In a regulator not employing droop, when the load~~ is ~~suddenly increased very rapidly (i.e. a transient), the output voltage will momentarily sag. Conversely, when a heavy load is suddenly disconnected, the voltage will show a peak~~. The output decoupling capacitors have to "absorb" these transients before the loop has a chance to compensate. A diagram of such transients is shown below. The maximum allowed voltage swing in such a transient is <~~math~~>~~V_{max} - V_{nom}~~<~~/math~~>.

	~~[[Image:Regulator no droop.png]]~~

	~~Comparing this~~ to a regulator with droop, we find that the maximum allowed swing has doubled: it is now <math>V_{max} - V_{min}</math>. This increased tolerance to transients allows us to decrease the number of output capacitors, or get better regulation with the same number of capacitors.

	~~[[Image:Regulator droop.png]]~~

	~~==References==~~
	*[http://~~www.maxim-ic~~.com/~~appnotes~~.~~cfm~~/~~appnote_number/993 Maxim~~-~~IC application note]~~
	*[http://~~www.canadiancontrols.com~~/~~documents/technical/Speed%20Droop%20and%20Power%20Generation.pdf speed droop and power generation]~~
	*Intersil Application Note 1021 (June 2002)

	~~[[Category:Electrical parameters]]~~
	~~[[Category:Electronics]~~]

en>Addbot: Bot: Migrating 1 interwiki links, now provided by Wikidata on d:q165495

2013-03-15T08:44:03Z

Bot: Migrating 1 interwiki links, now provided by Wikidata on d:q165495

← Older revision		Revision as of 10:44, 15 March 2013
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	~~Hi there~~, ~~I am Alyson Pomerleau~~ and ~~I believe it sounds fairly good~~ when ~~you say it~~. ~~To perform lacross~~ is the ~~factor I adore most of all~~. ~~Her family lives in Ohio but her spouse desires them~~ to ~~move~~. ~~Invoicing~~ is ~~my occupation~~.<br><br>~~Here~~ is ~~my webpage; free psychic readings;~~ [http://~~kpupf~~.com/xe/~~talk~~/~~735373 simply click the up coming website~~],		{{orphan\|date=September 2008}}

			'''Voltage [[Droop_(control)#Droop\|droop]]''' is the intentional loss in output [[voltage]] from a device as it drives a load. Employing droop in a [[Voltage regulator\|voltage regulation circuit]] increases the headroom for load transients.


			Although it may seem counterproductive, a series resistor is included between the regulator output and the load. The resistance needs to be chosen so that at maximum output current, the output voltage at the load is the minimum acceptable. Conversely, when the output current is (near) zero, the voltage is near the maximum. This follows simply from [[Ohm's law]]. The behaviour of the system with and without the added droop resistor is as follows:

			[[Image:Droop behaviour.png]]

			In a regulator not employing droop, when the load is suddenly increased very rapidly (i.e. a transient), the output voltage will momentarily sag. Conversely, when a heavy load is suddenly disconnected, the voltage will show a peak. The output decoupling capacitors have to "absorb" these transients before the loop has a chance to compensate. A diagram of such transients is shown below. The maximum allowed voltage swing in such a transient is <math>V_{max} - V_{nom}</math>.

			[[Image:Regulator no droop.png]]

			Comparing this to a regulator with droop, we find that the maximum allowed swing has doubled: it is now <math>V_{max} - V_{min}</math>. This increased tolerance to transients allows us to decrease the number of output capacitors, or get better regulation with the same number of capacitors.

			[[Image:Regulator droop.png]]

			==References==
			*[http://www.maxim-ic.com/appnotes.cfm/appnote_number/993 Maxim-IC application note]
			*[http://www.canadiancontrols.com/documents/technical/Speed%20Droop%20and%20Power%20Generation.pdf speed droop and power generation]
			*Intersil Application Note 1021 (June 2002)

			[[Category:Electrical parameters]]
			[[Category:Electronics]]

en>Rjwilmsi: Format plain DOIs using AWB (8079)

2012-06-28T08:05:32Z

Format plain DOIs using AWB (8079)

New page

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