T-amps (Off Topic)
All Class-D amps have a switching noise residual. The switching frequency goes from 400khz to more than 1 mhz. Output low pass filters recovers the audible range but the cut is not at 20khz but higher, not to affect audible frequencies. Tripath amps have usually a second order 100khz low pass output filter, so the range 20khz-100khz will still have switching noise.
This is not a problem because this is not audible, but is a problem for measuring instruments, so these need custom filters.
Complete thread:
- T-amps - GC, 2007-03-14, 14:24
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- T-amps - PeterSt., 2007-03-14, 15:45
- T-amps - GC, 2007-03-14, 15:57
- T-amps - PeterSt., 2007-03-14, 16:13
- T-amps - GC, 2007-03-14, 16:39
- T-amps - Giovanni, 2007-03-14, 19:01
- T-amps - Cappy, 2007-03-15, 04:32
- T-amps - Giovanni, 2007-03-15, 10:38
- If only... - Cappy, 2007-03-15, 19:58
- If only... - Giovanni, 2007-03-15, 21:18
- If only... - Cappy, 2007-03-15, 21:42
- If only... - Giovanni, 2007-03-15, 21:18
- If only... - Cappy, 2007-03-15, 19:58
- T-amps - Giovanni, 2007-03-15, 10:38
- T-amps - Cappy, 2007-03-15, 04:32
- T-amps - PeterSt., 2007-03-14, 16:13
- T-amps - Cappy, 2007-03-14, 16:45
- T-amps - GC, 2007-03-14, 16:50
- T-amps - GC, 2007-03-14, 15:57
- T-amps - Giovanni, 2007-03-14, 18:44
- T-amps - GC, 2007-03-14, 19:43
- T-amps - Rudolf150, 2007-03-14, 20:11
- T-amps - PeterSt., 2007-03-14, 15:45