Lower than the specifications you are likely to encounter, even on entry level This point, an observer may note that the number calculated above is a lot In that case you would need a minimum slew rate of about 32V/usec in order to Most well designed amplifiers are flat out to 100kHz so
Slew rate op amp offset full#
Rate of no less than ~6.3V/usec if it aims to achieve full output at 20kHz. Those numbers in, you’ll find that a THX Select 2 amplifier should have a slew Point, as this is the generally accepted upper limit of human hearing. Select a frequency to base our calculation on 20kHz would seem a good starting Which calls for peaks of up to 50V on all channels? Well, first we need to Minimum slew rate we need to effectively achieve THX Select 2 certification, So as a real world example, what is the bare High in frequency we want to go and how much output, as measured in volts, we Obtain a minimum necessary slew rate for an amplifier is:Īs you’ll note, the factors we need to fill in are how Now that we know what it is, how much slew rate is enough? The basic formula to Slew rate tells us how high in frequency an amplifier can play for a given Rate than at lower frequencies: this is what slew rate is all about. You go up in frequency, the value of the sine wave changes at a greater Since a picture is worth a thousand words, let’s take a look at aĪbove are sine waves of various frequencies the lowest frequency is on topįollowed by sine waves of progressively higher frequency. From there, people jump to theĬonclusion that an amplifier with a higher slew rate is more responsive,ĭynamic, etc.
This is measured as a change in voltage with respect to time as can be seen in the main image of this article.įirst thing that people tend to see in slew rate specification is that it is It is the rate of how quickly an amplifier can respond to a rapid change of input level. In short, slew rate has little to do with how an amplifier producesĭynamics so much as its ability to effectively maintain output into higherįrequencies. Misunderstand the basic premise, so we at Audioholics are here to clear theĪir. Reviewing the spec sheet of an amplifier, one potentially unfamiliar term youĪ lot of gobbledygook explanations floating around the web which seem to
This article gets to the basics of Amplifier Slew rate and what it means. Ever wonder what slew rate was all about? No, it has nothing to do with how a drunk person slurs their speech.