A computer-controlled system for the measurement of complete admittance spectra of piezoelectric resonators

A measurement system for the characterisation of the electrical properties of piezoelectric resonators is presented. Admittance of the resonator is measured at successive frequencies controlled by an algorithm which uses small frequency steps when a resonance is found, and large steps between the resonances. During the measurement, characteristic frequencies are marked for each resonance. Further evaluation of the data is done by a least-squares fit, which yields the parameters of the equivalent circuit for each resonance in closed form.

[2]  R. Holland,et al.  Accurate Measurement of Coefficients in a Ferroelectric Ceramic , 1969, IEEE Transactions on Sonics and Ultrasonics.

[3]  S. Hertl,et al.  New method of measuring vibration amplitudes of quartz crystals , 1984 .

[4]  G. E. Martin,et al.  Determination of Equivalent‐Circuit Constants of Piezoelectric Resonators of Moderately Low Q by Absolute‐Admittance Measurements , 1954 .

[5]  H. Bahadur,et al.  A new method for determination of the frequency spectrum of a quartz crystal and its applications , 1978, IEEE Transactions on Sonics and Ultrasonics.

[6]  E. Hafner,et al.  Automatic Microcircuit Bridge for Measurements on Quartz Crystal Units , 1978 .

[7]  E. Benes,et al.  Investigation of Quartz Crystal Thickness Shear and Twist Modes Using a New Noninterferometric Laser Speckle Measurement Method , 1985, 39th Annual Symposium on Frequency Control.

[8]  W. J. Spencer,et al.  Anharmonic, Thickness‐Twist Overtones of Thickness‐Shear and Flexural Vibrations of Rectangular, AT‐Cut Quartz Plates , 1967 .

[9]  E. Benes,et al.  Improved quartz crystal microbalance technique , 1984 .

[10]  R.J. Williamson.  An Improved Method for Measuring Quartz Crystal Parameters , 1987, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[11]  W. L. Smith,et al.  An Automatic Crystal Measurement System , 1973 .

[12]  D. Symonds,et al.  Comparison of Methods for Measurement of Quartz Crystal Resonators with Load Capacitance , 1981 .

[13]  Y. Watanabe,et al.  The Precise Determination by an Automatic System on the Resonance Frequencies of the Quartz Crystal Resonator. , 1986, 40th Annual Symposium on Frequency Control.