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-   -   Capacitor on Opamp Power Pins in Gwado CMoy (http://www.diyaudio.com/forums/headphone-systems/160521-capacitor-opamp-power-pins-gwado-cmoy.html)

Skazi 2nd February 2010 11:01 PM

Capacitor on Opamp Power Pins in Gwado CMoy
 
In the Gwado CMoy design, there are small capacitors attached to the opamp power pins. What do these capacitors accomplish?

nigelwright7557 2nd February 2010 11:42 PM

Decouple the op amp from power supply noise.

Skazi 4th February 2010 05:54 PM

Are electrolyic or film caps or something else better for this purpose? Is there any benefit or detriment to using bigger capacitance? 0.1uF is what's used in the Gwado schematic.

Thanks for the help :)

TheSeekerr 6th February 2010 02:07 PM

You're trying to filter high frequency noise, so a small cap is most useful here - I tend to use X7R ceramics of about 0.1uF (+/- 50% depending on what I have around).


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