Resources Contact Us Home
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
Radio frequency splitter
Evolutionary clustering algorithm
Physiological measuring system comprising a garment in the form of a sleeve or glove and sensing apparatus incorporated in the garment
Antenna module and wireless communication apparatus
High electron mobility transistor and manufacturing method thereof
Sparse data compression
Area efficient through-hole connections
  Randomly Featured Patents
Plug connector
Method of seismic signal processing and exploration
Small engine for power tools
Method of communication using sized icons, text, and audio
Lubricant filter assembly
Flow control valve
Mixing screw for extrusion and injection molding
Chair mount assembly and related kit for retrofitting a bench-style boat seat or thwart
Video gaming system with fixed pool of winning plays and global pool access