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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: Slew Rate??? posted by Don on October 8, 1999 at 17:00:18:
We studied slew rate limiting about 20 years ago. We wrote several technical papers on the subject for the AES, IEEE, 'Audio', 'Audio Amateur' and several other publications. We have found that a mimimum slew rate of .5V/V (peak to peak) is adaquate for virtually all amps and preamps. This is 50V/us with a 100W amp. Lower slew rates will give TIM (SID) distortion, with moving coil cartridges or other difficult sources. We have done virtually hundreds of tests that show this. It is relatively easy to have high slew rate power amps today, because output devices are much faster than they were 25 years ago. Also, Gm control of the input stage increases slew rate potential as well. Correspondingly, slew rates in IC's have risen from 0.5V/us to over 20V/us and much more, over the decades since they were first introduced for the same reason.
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- Re: Slew Rate??? - john curl 23:47:40 10/08/99 (0)
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