Delay-Locked Loop (DLL)

What Does Delay-Locked Loop (DLL) Mean?

A delay-locked loop (DLL) is a digital circuit that provides high-bandwidth data transmission rates between devices. DLL transmissions have no propagation delay, low clock skew between output clock signals and advanced clock domain control. DLL is similar to a phase-locked loop except that it does not include an internal voltage-controlled oscillator.

Techopedia Explains Delay-Locked Loop (DLL)

A delay locked loop is a circuit that's fed by a reference clock. A DLL tries to determine the period of that reference clock by adjusting a feedback look via the delay in a variable delay buffer. When the delayed clock signal matches the incoming clock signal, the loop is considered locked.