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In Reply to: Re: Confessions of a plate choke convert & a few CCS questions (long) posted by Lynn Olson on June 3, 2002 at 11:37:45:
"... and we all know distortion doesn't just go from zero to full."lynn,
your observations wrt slew rate limiting are not exactly what i have found, namely in that slew rate limiting is a gradual effect; instead i have found that either a stage is SRL or it is not... either there is enough current to drive the downstream capacitance, or there isn't. when there is enough current, you aren't SRL. this is distinctly different from the increase in THD that comes from increased signal level output, which is as you've described gradual in onset, but always there, even at the tiniest of levels. in contrast, below the max slew rate, there is ZERO SRL.
now, i agree that music is quite dynamic in nature and the requisite slew rate will therefore change throughout the performance, so the effect of SRL may come and go as the program material changes, but that's why you account for a cushion of headroom in your calculations for required SR.
ken
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Follow Ups
- Re: Confessions of a plate choke convert & a few CCS questions (long) - Ken Gilbert 06/4/0207:11:52 06/4/02 (5)
- Partial slew rate distortion - Lynn Olson 01:36:01 06/6/02 (4)
- Re: Partial slew rate distortion - Ken Gilbert 11:14:49 06/6/02 (3)
- Re: Partial slew rate distortion - Lynn Olson 12:44:55 06/6/02 (2)
- Re: Partial slew rate distortion - Lynn Olson 13:16:23 06/6/02 (1)
- thanks again lynn (NT) - Ken Gilbert 11:59:37 06/7/02 (0)
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