Lock Detector Integrated in a High Order Frequency Multiplier Operating at 60-GHz-Band in 45nm CMOS SOI Technology

This paper presents a lock detector integrated in a 60GHz band frequency multiplier with high multiplication factor. The proposed circuit detects the locking state of an injection locked oscillator. It relies on power integration besides the ILO targeted frequency. The proposed lock detector and the associated frequency multiplier presents a consumption of 61 mW and 5.2 mW respectively. The area occupied by the lock detector is less than 3% of the overall chip area. The locking detector is the cornerstone of injected oscillator calibration, and enables high-N frequency multiplication-based frequency synthesis.