They are two different ways of looking at the same thing.
Slew rate is a measure of how fast a signal is changing. How many volts it changes in a given period of time. Usually stated in volts per microsecond.
Rise time tells you how long it takes to get from 10% of the peak to 90% of the peak and ignores the beginning and end of the signal. If you had a signal that went from 0 to 10 volts, the rise time would be how long it took to get from 1 to 9 volts.
To use an automobile analogy: Slew rate would equal mph and rise tine would be the time it took to travel a certain distance. You can calculate one from the other.
Both are related to the maximum frequency a device can reproduce. If the slew rate is too low it will not be able to reproduce the higher frequencies. This is rarely a limiting factor in audio devices although some feel that the higher the slew rate the better the device.
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发表于 2017-11-5 18:04
They are two different ways of looking at the same thing.
Slew rate is a measure of how fast a signal is changing. How many volts it changes in a given period of time. Usually stated in volts per microsecond.
Rise time tells you how long it takes to get from 10% of the peak to 90% of the peak and ignores the beginning and end of the signal. If you had a signal that went from 0 to 10 volts, the rise time would be how long it took to get from 1 to 9 volts.
To use an automobile analogy: Slew rate would equal mph and rise tine would be the time it took to travel a certain distance. You can calculate one from the other.
Both are related to the maximum frequency a device can reproduce. If the slew rate is too low it will not be able to reproduce the higher frequencies. This is rarely a limiting factor in audio devices although some feel that the higher the slew rate the better the device.