Smooth Clamp Question

i think you need to use multiple diodes and create multiple breakpoints. i.e. piece wise

Start here:

Slew rate Limiting

Steve

I'm 10,000 miles ahead of that....

.SUBCKT OpAmpCore IN+ IN- OUT VP VN PARAMS: A=57.739m B=4.01 Q=4.319

• Z=1.5915 H=1 L=1 RG=200K CC=1.5915nF SH=22 SL=22 G_GM VN OUT VALUE {A*SINH(B*TANH(Q*V(IN+,IN-)))} R_RGL OUT VN {RG} R_RGH N_1 OUT {RG} C_CC OUT VN {CC} G_GH OUT VN VALUE {Z*exp(10.3465*TANH(SH*(H-V(VP,OUT)))-9.6535)} G_GL N_1 OUT VALUE {Z*exp(10.3465*TANH(SL*(L-V(OUT,VN)))-9.6535)} E_ISOL N_1 VN VP VN 1 .ENDS OpAmpCore

Perfect for DC Gain, GBW and Slew-Rate, but the swing limit (GH, GL) is not as precise as my perfectionist personality would like >:-}

But, in post...

Newsgroups: sci.electronics.design Subject: Re: Smooth Clamp Question Date: Thu, 17 Nov 2016 11:42:26 -0700 Message-ID:

I have found the proper way to do swing limit, and am now refining its parameterization.

I will post the whole enchilada when I am happy with it. ...Jim Thompson

it looks a bit like what you would get with a NE571 / NE572

"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...

How about a... er, whatever the hell this is... =AE$6*(($V6-AE$7)+LN(1+EXP(-(($V6-AE$7)*AE$8)))/AE$8)

Let's see... V6 = input (e.g. Vin) AE6 = gain (slope of asymptote) AE7 = offset (break point) AE8 = sharpness

Used it on an output current model with excellent fit:

Tim

Got it...

...Jim Thompson

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