PIEZOELECTRIC CERAMIC OSCILLATOR USING DAMPED CAPACITANCE ELIMINATIONTECHNIQUE

The temperature stability of a piezoelectric ceramic oscillator is imp roved, using the damped capacitance elimination technique, which is pe rformed using an operational amplifier circuit. In order to improve th e temperature stability, an electrostatic capacitance such that its te mperature characteristic can cancel a change of the oscillation freque ncy is also applied in the circuit. The theoretical principle of the d amped capacitance elimination circuit and the experimental results are described. The circuit proposed here is effective in improving the te mperature stability of the piezoelectric ceramic oscillator.