Electronic apparatus with two quartz crystal oscillators utilizing different vibration modes
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United States of America Patent
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May 24, 2005
Grant Date -
Sep 11, 2003
app pub date -
Mar 4, 2003
filing date -
Mar 6, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electronic apparatus has a display portion and quartz crystal oscillators having different modes of vibration. Each of the quartz crystal oscillators has a quartz crystal oscillating circuit having a quartz crystal resonator. The quartz crystal resonator of one of the quartz crystal oscillating circuits is a width-extensional mode quartz crystal resonator capable of vibrating in a width-extensional mode. The width-extensional mode quartz crystal resonator has a vibrational portion, connecting portions disposed at ends of the vibrational portion, supporting portions connected to the vibrational portion through the connecting portions, and electrodes disposed on upper and lower surfaces of the vibrational portion. The quartz crystal oscillating circuit having the width-extensional mode quartz crystal resonator outputs a clock signal for operating the electronic apparatus to display time information at the display portion.
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