Title:
発振器、電子機器、及び、移動体
Document Type and Number:
Japanese Patent JP6682845
Kind Code:
B2
Abstract:
An oscillator includes: an oscillation stage circuit that is connected between a first electrode and a second electrode of a resonator and performs an oscillation operation; a variable capacitance element that is connected to the first or second electrode of the resonator and adjusts an oscillation frequency; a bandgap reference circuit that generates a reference voltage having magnitude, which changes depending on the temperature, by using a resistor inserted in a current path through which a current having magnitude, which changes depending on the temperature flows; and a bias current generating circuit that generates a bias current of the oscillation stage circuit based on the reference voltage, and that, thereby, reduces a change in the oscillation frequency due to the temperature dependence of the impedance of the resonator or the temperature dependence of the sensitivity of the variable capacitance element.
Inventors:
Itasaka Yosuke
Application Number:
JP2015248274A
Publication Date:
April 15, 2020
Filing Date:
December 21, 2015
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
H03B5/32
Domestic Patent References:
| JP2004272882A | ||||
| JP2015035707A | ||||
| JP2005045695A | ||||
| JP2014030141A | ||||
| JP2009124214A | ||||
| JP2010063086A |
Attorney, Agent or Firm:
Kazuaki Watanabe
Mitsuhiro Isobe
Satoshi Nakai
Hiroki Matsuoka
Mitsuhiro Isobe
Satoshi Nakai
Hiroki Matsuoka