TEMPERATURE-COMPENSATION-TYPE PIEZOELECTRIC OSCILLATOR

WIPO Patent Application WO/2023/234141

A1

This temperature-compensation-type piezoelectric actuator (100) has a rock crystal vibration element (111) in which frequency temperature characteristics change according to at least a tertiary function, a temperature compensation circuit (130) that outputs a tertiary-function electrical signal for compensating for the frequency temperature characteristics of the rock crystal vibration element (111), and an oscillation circuit (112) to which the rock crystal vibration element (111) and a variable-capacitance element are connected and via which an output electrical signal from the temperature compensation circuit (130) is inputted to the variable-capacitance element. The temperature compensation circuit (130): generates a pseudo-tertiary-function electrical signal; and calculates an electrical signal that represents the difference between the pseudo-tertiary-function electrical signal and an ideal tertiary-function electrical signal, in which the pseudo-tertiary-function electrical signal is approximated using a tertiary function. A difference correction electrical signal corresponding to the electrical signal that represents the difference is added to the temperature compensation circuit (130).

SAKAMOTO SHINICHIRO (JP)

PCT/JP2023/019339

December 07, 2023

May 24, 2023

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DAISHINKU CORP (JP)

H03B5/32

WO2004025824A1

2004-03-25

JP2012119781A	2012-06-21
JP2018007165A	2018-01-11
JP2017175607A	2017-09-28
JP2016178605A	2016-10-06

ARC PATENT ATTORNEYS' OFFICE (JP)

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