slew rate
DESCRIPTION
Slew Rate. M.S.P.V.L Polytechnic College, Pavoorchatram. Introduction. The slew rate is an important characteristic for amplifiers and electronic s of elements The slew rate represents the maximum rate of change of a signal at any point in a circuit. - PowerPoint PPT PresentationTRANSCRIPT
Slew Rate
M.S.P.V.L Polytechnic College,
Pavoorchatram.
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Introduction
The slew rate is an important characteristic for
amplifiers and electronics of elements
The slew rate represents the maximum rate of
change of a signal at any point in a circuit.
Limitations in slew rate capability can give rise to
non linear effects in electronic amplifiers.
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OP-AMP Slew Rate
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Cont.,
For a sinusoidal waveform not to be subject to slew rate
limitation, the slew rate capability (in volts per second) at all
points in an amplifier must satisfy the following condition:
SR
Vpk
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Definition
The output slew-rate of an amplifier or other electronic
circuit is defined as the maximum rate of change of the
output voltage for all possible input signals.
SR
dvout(t)dt(
(
max
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Slew Rate switching diagram
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Slew Rate Calculation
Step1
Obtain a voltage versus time plot of an electronic
waveform for the electronic component you want to
know about.
You can ask the component's manufacturer for a data
sheet that illustrates the slew rate.
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Slew Rate Calculation
Step2
Calculate the voltage change. Subtract the lowest
voltage from the highest voltage.
Conclude that for a high voltage of 5 volts and a low
voltage of 0 Volts, the voltage change is 5 Volts, since 5
minus 0 is 5.
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Slew Rate Calculation
Step3
Calculate the time change. Subtract the time at which the
lowest value voltage occurs from the time the highest value
voltage occurs.
Conclude that if a low voltage of 0 volts occurred at time, 1
second and that a high voltage of 5 volts occurred at time, 4
seconds, the time change would be 3 seconds, since 4 minus 1 is
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Slew Rate Calculation
Step4
Calculate the slew rate.
Divide the voltage change by the time change.
Conclude that if the voltage change was 5 volts and the time
change was 3 seconds, the slew rate would be 1.66 Volts per
second, since 5 divided by 3 is 1.66.
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No overshooting arises in the output wave form
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Rising flanks of the signals
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Falling flanks of the signals
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The End
....... Thank You …….
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