@microtonal is correct. You can transform the linear ramps into logarithmic (parabola) using the bottom right section of Arch. You’d need a log circuit each for horizontal and vertical, and then mix the results.
That’s option #1. Another is to use a multiplier function. Multiplying a ramp by itself (mult to source and CV inputs of a fader or other gain control circuit) will produce an exponential curve. If you subtract the exponential curve from the original signal at 2X gain, you can get a logarithmic curve. This patch is possible with the right hand sections of Bridge (use the fader section to do the power of 2 multiply, and the mixer section with some multing to combine 2X original signal - fader output.)
And of course option #3 is the Shapechanger module, which has a dual gamma shaping circuit that morphs from exponential to linear to log on both horizontal & vertical channels.