|
Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
Register / Login
|
|
|
Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
Register / Login
|
In Reply to: had thought the broadcast RFI were Fourier frequenies from hard-switching posted by Mart on November 4, 2005 at 04:59:57:
the ideal switching amp has infinitely steep transitions and produces harmonics that split atoms. It also has the ideal filter that blocks all the harmonics so that only the reconstructed audio signal comes out of the amp's case.The point is that the so-called "soft-recovery" diodes are actually rapid switchers as well, but lack the interal stored energy that causes power supply ringing found in most audio gear that uses conventional rectifier diodes. There is not an analogy between them and the case of switching amp noise. The noise from switching amps comes out because their filters are not ideal, or even perfect.
[As an aside, the difference between 'ideal' and 'perfect' is best described by golf scores. An ideal score for 18 holes is 18, while a perfect score is 72.]
It may be the case that the control hardware for a switching amp can be improved to increase its efficiency and reduce its overall noise generation, but, at the end of the day, the filter is the critical element that converts the noise to heat and allows the audio signal to get out intact.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Yes... - Al Sekela 10:37:08 11/04/05 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
