16. A high-pass filter passes signals with frequencies that are higher than a certain cutoff frequency.

In this filter the ratio of the magnitudes of the voltages is given by:

where is the frequency of the input signal.

(a) Make a 3-D mesh plot of (z axis) as a function of f (x axis) for Hz, and as a function of RC (y axis) for s. Use a logarithmic scale for the x axis. This can be done by typing the MATLAB command set(gca,'Xscale','log') following the mesh command. A vector with constant spacing on a logarithmic scale can be created with the command logspace(a,b,n).

(b) Make a plot that is a projection on the x z plane.