TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR

PROBLEM TO BE SOLVED: To provide a temperature compensated crystal oscillator with which temperature compensation is enabled in a simple configuration. SOLUTION: This oscillator is provided with a temperature detection circuit 12 for detecting the ambient temperature of the crystal oscillator, capac...

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Bibliographische Detailangaben
Hauptverfasser:	TSUBAKIHARA JIYUNGO, IIZUKA NOBUO, SHIMIZU KEN, KAMEYAMA NAOTO, MAKITA KOICHI, YOSHIDA TAKASHI
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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a temperature compensated crystal oscillator with which temperature compensation is enabled in a simple configuration. SOLUTION: This oscillator is provided with a temperature detection circuit 12 for detecting the ambient temperature of the crystal oscillator, capacitors 5 and 7 selectively parallelly connected to a capacitor 4 as the load capacitance of a crystal vibrator 2 constituting a part of the crystal osicllator, switches 6 and 8 for respectively selectively parallelly connecting the capacitors 5 and 7 to the capacitor 4 of the crystal vibrator 2, and control circuit 13 for respectively switching the ON/OFF of the switches 6 and 8 when the detected ambient temperature reaches the upper limit or lower limit temperature of an operational gap with a predetermined threshold value inbetween.