Logarithmicizer in Logisim

Thread Starter


Joined Apr 4, 2022
Hey guys,
I have to simulate a logarithmicizer in Logisim but have no idea. I know the circuit with OPV but not the logical ciruit. Can anyone explain me, how I do it in Logisim?
Thanks for all answers


Joined Feb 24, 2006
The term "logarithmicizer" is not a word I am familiar with. It sounds like it might mean "compute the logarithm" of a digital input. To do that with a digital circuit could be a challenge. How would you do it with a calculator that did not have a built-in function to do it? Perhaps a better question would be: "how does the calculator do it?" The answer is that it probably uses a truncated Chebyshev series approximation. The advantage of this approach is that for a given number of terms the errors remain distributed over the interval and are bounded.