An 100MHz to 1.6GHz DLL-based clock generator using a feedback-switching detector

In this paper, a glitch-free DLL-based clock generator using a feedback-switching detector is proposed for a programmable power management system. The proposed circuitry utilizes feedback switching detectors to eliminate undesired glitch problem which is generated by switching feedback stage of a DLL. The clock generator can generate clock signals ranging from 100MHz to 1.6GHz. The peak to peak jitter is 23.168ps and power consumption is 37.8mW at 1.6GHz. The proposed clock generator is implemented in TSMC 0.18μm process and occupies only 0.039 mm² which is suitable for the power management systems.