Random clock Generation with unequal 1s and 0s distribution?
Think of the contents of the N-bit LFSR as an N-bit integer. This number will have a uniform distribution of values from 1 to 2N - 1. You can generate a variable density of mask bits by comparing this number to a threshold that you also vary from 1 to 2N - 1. The output of this comparator is the clock mask you seek.