Patent ID: 6057629
Filing Date: 2000-05-02
Classification: H03H

Abstract:
A harmonic vibration of a lower order suppressing piezoelectric resonator, comprising:a pair of main electrodes, facing each other and arranged on upper and lower surfaces at an almost center of a piezoelectric substrate;pairs of sub electrodes, facing each other and arranged on both sides of the vicinity of the main electrodes with gaps provided therebetween, respectively; anda vibration energy damper coated to deteriorate vibration strength by the sub electrodes, whereinwhen an electric equivalent circuit of the vibrator is expressed by a coupling circuit, which connects in series a circuit which connects in parallel a series resonance circuit (L.sub.2, C.sub.2, R.sub.2) by the sub electrodes and the dampers to coupling capacity (c.sub.k) indicating the main electrodes and the sub electrodes, to a series resonance circuit (L.sub.1, C.sub.1, R.sub.1) by the main electrodes, loop frequency consisting of the series resonance circuit by the main electrodes and the coupling capacity substantially coincides with loop frequency consisting of the series resonance circuit by the sub electrodes and the coupling capacity.