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In Reply to: RE: Slew rate. posted by knewton on June 02, 2012 at 11:41:32
But as with many things in audio, it really depends on a variety of unspecified parameters. Jitter is often dominated by waveform distortion products, so higher slew rates necessitate a wider bandwidth interface, and the jitter may actually become worse in a bandwidth-limited interface. Some have actually improved performance by limiting the transmission slew rate, and clock filters are even sometimes useful in D/A convertors.
Follow Ups:
Impedances need to be matched throughout the interface. If the driver output, cable, connector, and receiver termination impedances (not to mention the power supply decoupling) are not correct, then there's little that simply increasing slew rate can do to improve the situation. It may make things worse, as you suggest. Our discussion of reducing interface jitter by increasing driver slew rate assumes that the related interface parameters have been properly addressed.
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Ken Newton
Edits: 06/03/12
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