QUARTZ CRYSTAL UNIT, QUARTZ CRYSTAL OSCILLATOR AND ELECTRONIC APPARATUS

In a quartz crystal unit, the unit comprising a case, and a resonator having a base portion, and first and second vibrational arms, the base portion having a first base portion including a first width, and a second base portion including a second width greater than the first width, each of the first...

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Bibliographische Detailangaben
1. Verfasser:	Kawashima, Hirofumi
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS
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Beschreibung
Zusammenfassung:	In a quartz crystal unit, the unit comprising a case, and a resonator having a base portion, and first and second vibrational arms, the base portion having a first base portion including a first width, and a second base portion including a second width greater than the first width, each of the first and second vibrational arms having a first vibrational portion including a first width and a first length, and a second vibrational portion including a second width greater the first width and a second length less than the first length, the second base portion being mounted on a mounting portion of the case, at least one groove being formed in at least one of opposite main surfaces of the first vibrational portion of each vibrational arm, and a spaced-apart distance between the second vibrational portions of the first and second vibrational arms being less than a length of the second base portion of the base portion.