JP2003273698A5 - Electronic equipment equipped with a crystal oscillator - Google Patents

Description

  The present invention relates to an electronic device configured to include at least a display unit and an oscillator. In particular, the present invention relates to an electronic device comprising at least one crystal oscillator, which is an oscillator suitable as a clock source or a reference signal source.

[0004]
[Means for Solving the Problems]
The present invention provides an electronic device comprising a quartz oscillator consisting of a tuning fork-shaped quartz oscillator or a width longitudinal quartz oscillator or a thickness shear quartz oscillator vibrating in a bending mode which advantageously solves the conventional problems in the following manner. The purpose is to

That is, according to a first aspect of the electronic device equipped with the crystal oscillator of the present invention, a display unit, a first crystal oscillator including the first crystal oscillator circuit, and a second crystal oscillator including the second crystal oscillator circuit An electronic apparatus comprising: the first crystal oscillation circuit and the second crystal oscillation circuit each including an amplifier, a crystal oscillator, a resistor, and a capacitor; The vibration mode is different from the vibration mode of the quartz oscillator of the second quartz oscillation circuit, and the quartz oscillator constituting the first quartz oscillation circuit oscillates in the width longitudinal quartz oscillator vibrating in the width longitudinal mode or in the thickness shear mode Thickness oscillator quartz crystal, which constitutes the second crystal oscillation circuit, has a fundamental wave mode oscillation and a second harmonic mode oscillation, and a tuning fork-type bending quartz crystal oscillating in a reverse phase bending mode A second crystal source The circuit includes an amplifier circuit including a CMOS inverter and a feedback resistor, and the tuning fork type bending quartz resonator, a feedback circuit including a capacitor and a resistor, and the tuning fork type bending quartz resonator is a CMOS of the amplifier circuit. The absolute value of the piezoelectric constant e ₁₂ of the tuning fork-type bending quartz resonator is 0.095 C /, which is electrically connected to the inverter and the feedback resistor and to the capacitor and the drain resistor of the feedback circuit. The electronic device has a crystal oscillator which is in the range of m ² to 0.18 C / m ² and in which the output signal of each of the first crystal oscillator and the second crystal oscillator is a signal for the operation of the electronic device.

According to a second aspect of the electronic device mounted with the crystal oscillator of the present invention, in the first aspect, the tuning fork-type bent crystal resonator of the feedback circuit constituting the second crystal oscillation circuit has a width, a thickness and a length. A tuning fork-type bending quartz oscillator having a tuning-fork arm and a tuning-fork base, and vibrating in a reverse mode, wherein one end of the tuning-fork arm is connected to the tuning fork base and the other end is free. The tuning fork arm comprises at least a first tuning fork arm and a second tuning fork arm, and each of the first tuning fork arm and the second tuning fork arm has an upper surface, an opposing lower surface and a side surface. and each one of the grooves are provided at an arbitrary position in the width direction of the upper and lower surfaces of each side, or equal to each of the groove width W ₂ is partial width W _1, W _3, or partial width W _1, One for each of the first tuning fork arm and the second tuning fork arm, which is formed to be larger than W ₃ The ratio (W ₂ / W) of at least one groove width W ₂ to the tuning fork arm width W in the grooves is in the range of 0.35 to 0.95, and the thickness t _{1 of} the groove and the tuning fork arm The ratio of the thickness t to the thickness t (t ₁ / t) is in the range of 0.01 to 0.79.
According to a third aspect of the electronic device mounted with the crystal oscillator of the present invention, in the first aspect or the second aspect, the tuning fork-type bending crystal unit of the feedback circuit constituting the second crystal oscillation circuit is the first tuning fork A tuning fork-type bending quartz vibrator that is configured to include a tuning fork arm having an arm and a second tuning fork arm and a tuning fork base, and vibrates in a reverse phase bending mode. One end of the first tuning fork arm and the second tuning fork arm is a tuning fork The tuning fork-type bending quartz resonator connected to the base and free at the other end, wherein each of the first tuning fork arm and the second tuning fork arm has an upper surface and an opposing lower surface, and a first side and an opposing second side And one groove is provided at any position in the width direction of each of the upper surface and the lower surface, and the length of the groove is 0 with respect to the length of the tuning fork arm having the groove. An electronic device equipped with a crystal oscillator in the range of .4 to 0.8.

Claims (3)

An electronic apparatus comprising: a display unit; a first crystal oscillator including a first crystal oscillation circuit; and a second crystal oscillator including a second crystal oscillation circuit,
Each of the first crystal oscillation circuit and the second crystal oscillation circuit includes an amplifier, a crystal oscillator, a resistor and a capacitor, and the vibration mode of the crystal oscillator of the first crystal oscillation circuit is the second crystal oscillation circuit. The crystal unit constituting the first crystal oscillation circuit is different from the vibration mode of the crystal unit. The crystal unit constituting the first crystal oscillation circuit is a width vertical crystal unit vibrating in a width longitudinal mode or a thickness shear crystal unit vibrating in a thickness shear mode. (2) The quartz oscillator constituting the quartz oscillator circuit is a tuning fork-type bent quartz oscillator having fundamental wave mode oscillation and second harmonic mode oscillation and oscillating in an opposite phase bending mode,
The second crystal oscillation circuit includes an amplifier circuit including a CMOS inverter and a feedback resistor, and the tuning fork type bending crystal unit, a feedback circuit including a capacitor and a resistor, and the tuning fork type bending crystal unit includes Electrically connected to the CMOS inverter of the amplifier circuit and the feedback resistor, and electrically connected to the capacitor and the drain resistor of the feedback circuit,
The absolute value of the piezoelectric constant e ₁₂ of the tuning fork-type bending quartz resonator is in the range of 0.095 C / m ² to 0.18 C / m ² , and the output signal of each of the first crystal oscillator and the second crystal oscillator is An electronic device equipped with a crystal oscillator, which is a signal for operating the electronic device. The tuning fork type bending quartz crystal resonator of the feedback circuit constituting the second crystal oscillation circuit according to claim 1, comprising a tuning fork arm having a width, a thickness and a length, and a tuning fork base, in a bending mode of opposite phase. An oscillating tuning fork type bending quartz oscillator, wherein one end of the tuning fork arm is connected to the tuning fork base, and the other end is a tuning fork type bending quartz oscillator whose free end is at least a first tuning fork arm and a second A tuning fork arm is provided, and each of the first tuning fork arm and the second tuning fork arm has an upper surface, an opposing lower surface and a side surface, and each at any position in the width direction of the upper surface and the lower surface. one groove is provided, each groove width W ₂ of equal to or partial width W _1, W _3, or greater than the partial width W _1, W ₃ so formed, the first fork arm and the second tuning fork the ratio of the at least one groove width W ₂ and the tuning fork arm width W of each one of the grooves provided in the arm (W / W) is within the range of 0.35 to 0.95, and the ratio of the groove of the thickness _{t 1} and the tuning fork arms of the thickness t _(t 1 / t) is 0.01 to 0.79 An electronic device equipped with a crystal oscillator characterized by being in the range. The tuning fork-type bending quartz crystal vibrator of the feedback circuit constituting the second crystal oscillation circuit according to claim 1 or claim 2, comprising a tuning fork arm having a first tuning fork arm and a second tuning fork arm and a tuning fork base A tuning fork-type bending quartz oscillator vibrating in a reverse phase bending mode, wherein one end of the first tuning fork arm and the second tuning fork arm is connected to the tuning fork base, and the other end is a tuning fork-type bending quartz oscillator that is free Each of the first tuning fork arm and the second tuning fork arm has an upper surface, an opposite lower surface, and a first side and an opposite second side, and any width direction of each of the upper surface and the lower surface A crystal oscillator, characterized in that in each position a groove is provided, the length of the groove being in the range 0.4 to 0.8 with respect to the length of the tuning fork arm with the groove Electronic equipment mounted.