Proper power supply in electronic circuits is always the most important factor of electronic devices, both analog and digital . In the case of analog circuits usually has a significant effect on the different types of noise that is generated in the system, which are amplified and reproduced in ever greater extent (this can be seen in all kinds of audio equipment – video) .
Tamang supply ng kapangyarihan sa electronic circuits ay palaging ang pinaka-mahalagang kadahilanan ng electronic device, parehong analog at digital . Sa kaso ng mga analog circuits karaniwang may isang makabuluhang epekto sa ibang uri ng ingay na binuo sa system, na amplified at kopyahin sa kailanman mas malaki lawak (ito ay makikita sa lahat ng mga uri ng audio kagamitan – video) .