Title:
VIBRATOR, OSCILLATOR, ELECTRONIC APPARATUS, AND MOVABLE BODY
Document Type and Number:
Japanese Patent JP2017200015
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a vibrator reducing a reduction in frequency accuracy due to internal resonance and being capable of achieving improvement of the frequency accuracy, and provide an oscillator, an electronic apparatus and a movable body.SOLUTION: A vibrator has: a vibration piece 2 including a base section 21 and vibration arms 22 and 23; and a base 91 to which the vibration piece is attached. When n is defined as a natural number of 2 or more, the vibration piece is subjected to vibration having n pieces of natural vibration modes having resonance frequencies different from one another. In a relation among resonance frequencies corresponding to individual ones of the n pieces of natural vibration modes and an arbitrary integer, a standardized frequency difference Δf satisfies an illustrated formula. A ratio of a variation of a resonance frequency of a main vibration to excitation power electrically exciting the main vibration of the vibration piece is equal to 20[ppm/μW] or more.SELECTED DRAWING: None
Inventors:
YAMADA AKINORI
Application Number:
JP2016088410A
Publication Date:
November 02, 2017
Filing Date:
April 26, 2016
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
H03H9/19; H03H9/215
Domestic Patent References:
| JP2014200050A | 2014-10-23 | |||
| JP2007336045A | 2007-12-27 | |||
| JP2010103805A | 2010-05-06 | |||
| JP2015005787A | 2015-01-08 |
Attorney, Agent or Firm:
Tatsuya Masuda
Kazuo Asahi
Kazuo Asahi