# What is the Use of a Decoupling Capacitor?

**URL:** <https://sierraconnect.protoexpress.com/t/what-is-the-use-of-a-decoupling-capacitor/158>\
**Category:** Power Integrity\
**Tags:** decoupling-capacitor\
**Created:** [September 28, 2023, 6:31pm UTC](https://sierraconnect.protoexpress.com/t/what-is-the-use-of-a-decoupling-capacitor/158 "2023-09-28T18:31:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lucy.sierracircuits](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/lucy.sierracircuits/32/8_2.png) [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\
**Post date:** [September 28, 2023, 6:31pm UTC](https://sierraconnect.protoexpress.com/t/what-is-the-use-of-a-decoupling-capacitor/158/1 "2023-09-28T18:31:23Z")

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Originally published at: [https://www.protoexpress.com/blog/decoupling-capacitor-use/](https://www.protoexpress.com/blog/decoupling-capacitor-use/)  
   
System noise has become a critical issue for both analog and digital devices. The requirement for speedy interfaces and lower power consumption has resulted in devices being sensitive to disturbances from power and signal lines.