I am comparing a voltage reference with an input signal in a clocked comparator. I was facing issue of kickback noise of comparator affecting the voltage reference signal. To shield the reference voltage, I placed a unity gain buffer op amp with its input being set to vref and output going to the comparator input. While the buffer helps in reducing the kickback ripple at Vref, the buffer output now has more kickback noise. What can I do now ? I can't change the design of the comparator?