Is there any way to separate or filter out a sawtooth wave dependent upon which direction the saw tooth edge is?

ie, one part lead rises sharp and tapers for one signal and the other signal has a leading taper then a sharp drop in voltage.

I do not want to filter frequency, already have a passive low pass to cut high freq noise.

Just need to separate the two signals. (or omit one and then buffer, omit the other)



I am completely baffled on this one.