Bypassing & Coupling/Decoupling explained?

KevinLee · 13th January 2003, 09:41 PM

Hello,

I am a little bit confused when reading posting regarding the above terms.

Could someone please explain the meanings of (1) bypassing, (2) coupling & (3) decoupling.

I have seen conflicting descriptions of these terms and would appreciate any help.

I am interested in these terms related to power supplies and op-amps.

Thanks in advance.

Cheers

KevinLee

fezz · 14th January 2003, 05:10 PM

all these terms are related to capacitors:

bypassing is putting a smaller, but better quality (such as a MKP film capacitor) in parrallel with eletrolitics to improve the performance of them, this is usally cheaper then buying high quality eletrolytics

coupling and decoupling: capacitors are used to block DC voltage so only the AC voltage passes - this can be used in powersupplies but is almost always used in amplifiers to prevent damage from DC voltage to the speakers

August West · 18th January 2004, 05:25 PM

There is a good introduction to bypassing and decoupling titled "Power supply noise reduction" that you can find at http://www.designers-guide.com/Design/.

-August

13th January 2003, 09:41 PM	#1
KevinLee diyAudio Member Join Date: Oct 2002 Location: Winnipeg MB Canada	Bypassing & Coupling/Decoupling explained? Hello, I am a little bit confused when reading posting regarding the above terms. Could someone please explain the meanings of (1) bypassing, (2) coupling & (3) decoupling. I have seen conflicting descriptions of these terms and would appreciate any help. I am interested in these terms related to power supplies and op-amps. Thanks in advance. Cheers KevinLee

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14th January 2003, 05:10 PM	#2
fezz diyAudio Member Join Date: Feb 2002 Location: milton keynes, UK	all these terms are related to capacitors: bypassing is putting a smaller, but better quality (such as a MKP film capacitor) in parrallel with eletrolitics to improve the performance of them, this is usally cheaper then buying high quality eletrolytics coupling and decoupling: capacitors are used to block DC voltage so only the AC voltage passes - this can be used in powersupplies but is almost always used in amplifiers to prevent damage from DC voltage to the speakers

18th January 2004, 05:25 PM	#3
August West diyAudio Member Join Date: Jan 2004 Location: at the wharf	There is a good introduction to bypassing and decoupling titled "Power supply noise reduction" that you can find at http://www.designers-guide.com/Design/. -August

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