Research on fast measurement technique of quartz crystal unit resonant frequency
Jun Yang · 2006
A quartz crystal units'measurement system based on π network measuring method is introduced.A model is built on the output voltage of π network and the phase delay between its input voltage and output voltage after adequate research on them.A algorithm combining iterative algorithm and bisection algorithm is put forward.Because of its fast speed and high precision,it is used for semi-manufactured product's manufacturing control and finished product's measurement of quartz crystal units ranging from 1MHz to 200MHz.It was proved that measurement precision and stability of the whole measurement system has reached an international leading level.