Sorry it's been a while since I posed here. I'm working on a project for school that will involve sending a synchronizing signal to an oscillator on a reciever, which I know often uses a phase-lock-loop. However, I was doing some reading on injection-locking, and it seems that it would be easier to utilize than a circuit involving several mixers, filters, and variable reactance components. But dispite this I can't find any instances where it's used in a practical circuit, so it somehow seems to be less preferable than PLLs. I'm wondering if anyone knows why this is the case (why PLL are prefered over injection-locking). Thanks!