A 0.35 V, 100 MHz, 0.19 μW/MHz, 3-locking-cycle all digital delay locked loop with asynchronous-deskewing technology in 55 nm CMOS technology

This paper presents an all digital delay-locked loop (ADDLL) that uses asynchronous-deskewing technology and achieves low power/voltage, small jitter, fast locking, and high process, voltage, and temperature (PVT)-variation tolerance. The measurement results show that the maximum frequency is 100 MHz at 0.35 V with 19μW power dissipation, 62 ps peak-to-peak jitter, and 3 locking cycles. When operated at 0.5 V, the measured maximal operating clock frequency is 450 MHz with 12 ps peak-to-peak jitter, 6 locking cycles, and 119μW power dissipation. The ADDLL is fabricated with 55nm CMOS technology, and the active area is only 0.019 mm².