A Low-Jitter Technique of Frequency Multiplication Using Quartz Crystal Array

A novel technique for frequency multiplication provides higher frequency clock output by using the crystal delay array made from the low-frequency crystal filters. This paper presents the analysis and design in both crystal array arrangement and circuit level of such systems. The low-jitter and high frequency stability characteristics, low cost and small size features will be also discussed with comparing current crystal oscillators. The simulation and prototyping results will be given. The presented technique is extendable to other types of resonator devices such as saw and mems based filter array to generate even higher clock frequency.