How to Create Linear Rise and Fall Edges in a Circuit

[dpitts]

I need help with a circuit. I need to run the signal in first image through a circuit that can clean up the exponential rise and fall edges and make it more linear. Can anyone help.

http://picasaweb.google.com/davidanthonypitts/SignalWaveforms?authkey=5iLxB--Xdqs#

 

[f95toli]

What do you mean by "linear"? That you want the signal to ramp between the levels or do you need the the transitions to be more "vertical"?

 

[dpitts]

What do you mean by "linear"? That you want the signal to ramp between the levels or do you need the the transitions to be more "vertical"?

Ramp. Figure 2 is exactly what i need. I believe that is a ramp, however slight it is.