Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Electronic apparatus having quartz crystal oscillating circuits










Image Number 18 for United States Patent #8127426.

An electronic apparatus has a display portion, and first and second oscillating circuits each having a quartz crystal resonator, the quartz crystal resonator of each of the first and second oscillating circuits vibrating in a different mode from each other. One of the quartz crystal resonators is a quartz crystal tuning fork resonator having first and second tuning fork tines. Electrodes are disposed on side surfaces of each of the first and second tuning fork tines so that the electrodes of the first tuning fork tine have an electrical polarity opposite to an electrical polarity of the electrodes of the second tuning fork tine. The capacitance ratio r.sub.1 of a fundamental mode of vibration of the quartz crystal tuning fork resonator is less than a capacitance ratio r.sub.2 of a second overtone mode of vibration thereof. An output signal of the oscillating circuit having the quartz crystal tuning fork resonator is a clock signal used to display time information at the display portion of the electronic apparatus.








 
 
  Recently Added Patents
Method for specifying control curve parameters for controlling climatic environmental conditions of climate-controlled enclosed spaces
Sink
Ventilated vacuum commutation structure
RFID reader revocation checking using low power attached displays
Establishing a social network
Inter-cell power control in the presence of fractional frequency reuse
Method and apparatus for an active low power mode of a portable computing device
  Randomly Featured Patents
Control of dye migration in thermosol dyeing processes
Eyeglasses
Multimedia/secure digital cards and adapters for interfacing using voltage levels to determine host types and methods of operating
Lock assembly having secure engagement plate
Wheel cover and rim shield with multi-ridged grip
Portable light source and retainer for mounting
Direct loading of opaque types
Portable loss-protection device
Method for measuring density, printing method, method of calculating correction value, method of manufacturing printing apparatus and method for obtaining correction value
Segmented locking ring and corresponding assembly and mounting method