Discuss the principles and applications of phase-locked loops (PLLs) and delay-locked loops (DLLs) in digital design, including clock generation, frequency synthesis, and jitter reduction.

Phase-locked loops (PLLs) and delay-locked loops (DLLs) are feedback control systems used to generate stable clock signals and synchronize timing in digital circuits. They are widely used in clock generation, frequency synthesis, clock distribution, and jitter reduction in digital systems.