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Feb 5th, 2023, 7:12pm
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 Simulate slew rate of a fully differentiel amplifier (Read 11466 times)
 IvoryDesigner Junior Member Offline Posts: 10 Simulate slew rate of a fully differentiel amplifier Mar 11th, 2010, 1:20pm   Hi, I'm simulating performances of a fully differential OpAmp, and I would like to know How to simulate the Slew rate. I know how to do it with a single ended OpAmp: Set the OpAmp into follower configuration and enter a pulse at the input and look at the output.Is it the same with a fully differential OpAmp??Thank you for your help! Back to top IP Logged
 sheldon Community Fellow Offline Posts: 751 Re: Simulate slew rate of a fully differentiel amplifier Reply #1 - Mar 12th, 2010, 10:14pm   Ivory,   Maybe I am missing something, but why don't you just measureslew rate of the amplifier in the application test bench? That is, inputa pulse into your circuit and measure the slew rate. The slew rate is dependent on context, that is, the circuit architecture.                                                            Best Regards,                                                               Sheldon Back to top IP Logged
 IvoryDesigner Junior Member Offline Posts: 10 Re: Simulate slew rate of a fully differentiel amplifier Reply #2 - Mar 13th, 2010, 7:38pm   Hi Sheldon,Thanks for your answer, that a good point . I know I can measure the SR of the entire analog chain, but I also want to caracterise the intrinsic performance of the amplifier alone with the load.Best Regards!!IvoryDesigner Back to top IP Logged
 yvkrishna Senior Member Offline Posts: 117 Re: Simulate slew rate of a fully differentiel amplifier Reply #3 - Mar 15th, 2010, 6:45am   Hi Ivory,apply a differential step at the inputs(each of half the magnitude) and measure slew at the diffferential o/p.Thanks,yvkrishna Back to top IP Logged
 BackerShu Community Member Offline Posts: 64 Re: Simulate slew rate of a fully differentiel amplifier Reply #4 - Jun 28th, 2010, 6:52pm   Hi Ivory!This post may give you some reference if you still need it.http://www.edaboard.com/viewtopic.php?t=373921&sid=4673be3c19446c2a6615a6baa5404...By the way, I think sheldon's is much more proper to get the real SR spec of the OPAMP, since the exact environment of it can't be easily built, such as the C load, the influence of the clock signal if the circuit has one. Back to top Thanks and Regards!BackerShuhttps://www.linkedin.com/pub/shu-guanghua/26/b72/711   IP Logged
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