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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: also did on T² posted by Mart on November 3, 2005 at 07:45:58:
"Ordinary" silicon rectifiers, (which are not oscillating BTW) have charge storage which causes a voltage spike on turn off which excites the circuit inductance generating RF. These can be replaced by devices which do not exhibit this effect. Fast or slow is not the issue. Hexfreds for example, are actually much faster than ordinary silicon diodes, NOT slower.Causing a class-D amplifier to have slow switching edges (which may well be possible by correct switch driver design) will increase the dissipation in the switches. In this case why bother using class-D? Use class AB and there is no switching and no noise.
BTW,this cannot be achieved by just changing diodes - it isn't clear in you question whether you think these two are related.
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Follow Ups
- You are perhaps confusing two things. - clifff 10:07:02 11/03/05 (3)
- Minor elaboration to help with Mart's understanding... - Al Sekela 10:33:24 11/03/05 (2)
- had thought the broadcast RFI were Fourier frequenies from hard-switching - Mart 04:59:57 11/04/05 (1)
- Yes... - Al Sekela 10:37:08 11/04/05 (0)
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