A 40GHz DLL-Based Clock Generator in 90nm CMOS Technology

A 2-to-5GHz multi-phase multi-period-locked DLL is fabricated in a 90nm CMOS technology. At 5GHz, the measured rms jitter is 0.874ps and the peak-to-peak jitter is 7.56ps. The multi-phase DLL is used for a 40GHz clock generator. The core area is 0.374times0.326mm
²
and the power consumption is 45mW at 1V.