An amplifier isn't operated in open loop, slew rate in open loop is no useful specification.
But if you want to operate the amplifier as a comparator, what's the problem to measure a response time and rise-/fall time or calculate a slew rate as a function of input overdrive?
+-10v input voltage,
Hi,
Some OPAMPs you will kill with that input voltage ... within milliseconds or less.
Be sure it is within the OPAMP´s specification.
Klaus
THANKS,
but i meant to measure the rise-time with just the open-loop given op-amp!
so i design circuits for this op-amp to find the open-loop dc gain and open-loop frequency and the slew rate.
now i have this parameters, but still i don't know how to do this?
Beyond useful amplifier specifications, it's true that general purpose OPs with miller compensation have an almost constant slew rate set by the input stage saturated output current and the miller capacitance.
I don't understand what's the calculation problem. Presumed you get a trapezoidal output waveform between lower und upper saturation point, slew rate (dV/dt) and rise-/fall-time (time between 10 and 90% level) can be easily derived, isn't it?
May be. We should look at the OP topology.i get different rise times when the input voltage is +-10v and +-5mv in simulation.
how you calculate this without "simulation"?
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