Patent ID: 9712087
Date: 2017-07-18
CPC Classifications: B25J,H02N,Y10S

Claim:
1. A piezoelectric element drive circuit comprising: a piezoelectric element that has a piezoelectric substance whose thickness is 0.05 μm to 20 μm, and two electrodes which interpose the piezoelectric substance therebetween; an inductor that is connected to the piezoelectric element in parallel; a drive voltage generation circuit that applies a drive voltage including an AC component to the piezoelectric element and the inductor; and a capacitor that is connected to the inductor in series, wherein the drive voltage is a voltage obtained by adding a DC component to the AC component, and wherein inductance of the inductor is a sum of first inductance which configures parallel resonance with the piezoelectric element and second inductance which configures series resonance with the capacitor, and is set so that a resonance frequency of the parallel resonance and a resonance frequency of the series resonance are coincident with each other.