Driving gear of piezoelectric actuator

Abstract

Abstract PURPOSE:To reduce the cubic volume of a coil by using a high frequency signal as a driving signal of a piezoelectric actuator. CONSTITUTION:A driving gear of a piezoelectric actuator is composed of transistors(Tr) 2, 4 and 6, a coil 7, AND gates 14 and 16, etc. The output terminal of the 1st AND gate 14 is connected to the base of the Tr 2. To the two input terminals of this gate 14 a driving signal of e.g., several kHz of frequency signal from a high frequency oscillator 15 are added respectively. To the base of the above Tr 6 the output terminal of the 2nd AND gate 16 is connected. The above driving signal is added to one of the two input terminals of this gate 16 through an inverter 17. To the other input terminal a high frequency from the above oscillator 15 is added. The inductance component of the coil 7 can thereby be reduced in correspondence with the frequency of the above high frequency signal.

Inventors

• 👤 Sei Yoda
• 👤 聖 依田

Bibliographic Details