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Bypassing & Coupling/Decoupling explained?
Bypassing & Coupling/Decoupling explained?
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Old 13th January 2003, 10:41 PM   #1
KevinLee is offline KevinLee  Canada
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Join Date: Oct 2002
Location: Winnipeg MB Canada
Question Bypassing & Coupling/Decoupling explained?


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.


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Old 14th January 2003, 06:10 PM   #2
fezz is offline fezz  United Kingdom
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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
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Old 18th January 2004, 06:25 PM   #3
August West is offline August West  United States
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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/.

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