http://pokit.org/get/c2d0bb4355d353d0ff5bc47c7158ce45.jpg [Broken] Suppose we have an op-amp configured as a comparator. At -ive lead, we are sending the carrier wave, specifically in my example, triangle wave. At +ive lead, we are sending the input signal, the one that we want to modulate, specifically in my example a sine wave. My question is regarding the amplitudes of both waves. What would be the best choice of amplitudes: 1. They are both the same 2. The carrier wave should have a bit or a lot above the input signal. Also my thoughts here are that the carrier wave shouldn't ever be beyond input signal(regarding the amplitudes) because we wouldn't get a very good modulation at the output, am I right?