How to do multiplexer with two input & higher voltage ou

[elec4fun]

how do that

Hello, I have to do a multiplexer with two inputs and the output will be the higher voltage between the two inputs. The input signal bandwidth is about 1MHz and the signal voltage is 0-2.5v... I try do something with operationals amplifier and diodes but it's not as good as I want. In the *.jpg, my results (red and orange are inputs, purple is output).

My question: How would you do that ?

Thanks.

 

[mmohsen]

how do that

Is your signal digtal or analog ??

try to use an Op-Amp to sense the voltage and to take its output to control the MUX.

Regards

 

[elec4fun]

Re: how do that

Inputs are analog. I thought of that, comparator+mux but I use operationnal amplifier to ajust amplitude and I would like to use the amplifier left to do the job. If I can't find a solution I'll use comparator+mux...

 

[elec4fun]

Re: how do that

up, please