JPS59224909A - Piezoelectric vibrating element device - Google Patents

Abstract

PURPOSE:To reduce number of components and to simplify connection of wires by connecting and grounding one electrode of capacitors mutually, connecting the other electrode to each opposite electrode of a piezoelectric vibrator respectively and leading out a signal wire from each of the electrodes. CONSTITUTION:A counter electrode 16 of chip capacitors 14 is used in common and led to an earth wire 18, and electrodes 12, 13 of the piezoelectric vibrating element and an electrode 15 of the chip capacitor are connected in common and extracted as signal wires 20 and 19. Three wires are enough for the connection of the vibrating element device comprising the vibrating element 11 and the capacitors 14 in this way, and the vibrating element device of 3-pin configuration is obtained by connecting the three wires to three pins 18a, 19a, and 20a. The number of components is reduced and the connection of wires is simplified in this way.

Description

Detailed Description of the Invention (11 Technical Field of the Invention (2) The present invention relates to a piezoelectric vibrating element device, specifically a resonator for an oscillation circuit such as a microcomputer in which a capacitor element of 2 (11i1) is connected to a terminal of a piezoelectric vibrating element. .

(2) Background of the technology A clock generation circuit for a microcomputer using a piezoelectric vibrating element (hereinafter abbreviated as a vibrating element) is shown in Figure 1, where 1 is a microcomputer, 2 is a vibrating element, and 3 is a vibrating element. Indicates a load capacitor, and connects 1llil to a predetermined terminal of microcontroller 1.
The vibrating element and two load capacitors, that is, three components, are connected, and the vibrating element and the capacitor terminal are coupled by wiring.

The inventors of the present application have published the above-mentioned piezoelectric vibrating element as "electronic materials J" under the title "chip type LiTaO5 vibrating element".
It was disclosed in detail on pages 63 and following of February 1983.

(3) Prior art and problems In the above clock generator for microcontrollers, 3
Because it has a configuration in which several parts are prepared and the terminals of these parts are connected by wiring, it is possible to reduce the number of parts used and use wiring (3) as a clock generator for microcontrollers that are becoming smaller. There is a need to further simplify the connection.

(4) Purpose of the Invention In view of the above-mentioned conventional problems, an object of the present invention is to provide a device that reduces the number of parts and simplifies wiring connections in a resonator device used for generating clock signals for microcomputers. shall be.

(5) Structure and object of the invention According to the present invention, in a piezoelectric vibrating device consisting of a piezoelectric vibrating element and two capacitors, one electrode of the capacitor is connected to each other and grounded, and the other electrode of the capacitor is This is achieved by providing a piezoelectric vibrating element device characterized in that signal lines are connected to opposing electrodes of the piezoelectric vibrating element and are led out from each of the opposing electrodes of the piezoelectric vibrating element.

(6) Examples of the invention Embodiments of the present invention will be explained in detail below with reference to the drawings.

The present inventors considered principle (4) of integrating the vibrating element and the capacitor by simultaneously using the terminal electrode of the vibrating element as a capacitor terminal electrode without using wiring.

This principle is expressed in the cross-sectional view of FIG. 2(a), in which 11 is a vibrating element, 12.13 is an electrode of a piezoelectric vibrating element, 14 is a chip capacitor, 15 is an electrode of the chip capacitor, and 16 is the counter electrode of the chip capacitor,
Reference numeral 17 indicates, for example, a ceramic substrate on which the vibration element is mounted.

In the embodiment of the present invention, the connection between the terminal of the vibrating element and the chip capacitor terminal is simplified as described below.

That is, the opposing electrode 16 of the chip capacitor 14 is made common and led to the ground line 1, and the electrodes 12 and 13 of the vibrating element and the electrode 15 of the chip capacitor are made common and taken out as signal lines 20 and 19, respectively.

Thus, in the embodiment of the present invention, three wires are sufficient for connecting the vibrating element device consisting of the vibrating element and the capacitor, and these three wires are connected to the three wires as shown in FIG. When connected to the bins 18a, 19a, 20a, a three-pin vibrating element device is provided. The illustrated configuration in which the ground bin 18a is sandwiched between the signal line bins 19a and 20a (5) has the advantage that the bins can be easily isolated and recognized from each other.

Furthermore, when the signal lines 19 and 20 are connected to the microcomputer as shown in FIG. 2 (C1), a clock generator for the microcomputer whose configuration as shown in FIG. 1 is significantly simplified is provided.

In the above embodiment, one of the electrodes of the chip capacitor
Although the capacitor is directly connected to the vibrating element, the capacitor can also be provided as described below.

As shown in FIG. 3, two capacitors 24 are connected to the vibration element 1.
One of the electrodes of the capacitor 24 is shared with the upper and lower electrodes 22 and 23 of the vibrating element 11, a signal line is drawn out from the upper and lower electrodes, and the opposing electrode 26 of the capacitor is made common. Take the ground.

Alternatively, as shown in FIG. 4, a capacitor is formed by interdigital electrodes 32 and 33 provided on the surface of the vibrating element 11.

(6) Alternatively, as shown in FIG. 5, a capacitor is formed by interdigital electrodes 42 and 43 provided on the ceramic substrate 17 on which the vibration element 11 is mounted.

The two-part two-part embodiment has the advantage that the opposing electrodes of the capacitors provided on the back side of the piezoelectric vibrating element or the ceramic substrate can be easily shared.

Furthermore, as shown in FIG.
A capacitor 14 is formed between the lower electrode 53 and the counter electrode 16, and between the lower electrode 53 and the counter electrode 16, respectively. In this embodiment, in order to suppress vibrations, a sound absorbing material 54 is provided on the capacitor formation portion to absorb sound, or electrodes 52 and 53 are arranged so as to suppress vibrations by eliminating polarization as shown by arrows in the figure.

(7) Effects of the Invention As explained in detail above, according to the present invention, in a resonator device for an oscillation circuit such as a microcomputer, three (11) conventional components are integrated into one F17J, and the connection terminals thereof are integrated into one F17J. Since only three wires are required, it is sufficient for downsizing microcontrollers, etc.
It has the effect of S.

[Brief explanation of the drawing]

(7) Fig. 1 is a diagram showing a conventional microcomputer clock generation circuit, Fig. 2 (al is a sectional view of the embodiment of the present invention, Fig. 2 is a sectional view of the embodiment of the present invention,
A front view of the embodiment of the present invention with a pin configuration, 2nd M (C) is a diagram showing the connection between the vibrating element device and the microcomputer in the same figure (al), and 3rd
6 are sectional views of other embodiments of the present invention, and FIGS. 4 and 5 are plan views of other embodiments of the present invention. ■-Microcomputer, 2--piezoelectric vibrating element, 3-1 capacitor, 11-piezoelectric vibrating element, 12.13, 22, 23, 3
2,33,42,43,52.53-piezoelectric vibrating element electrode, 14-capacitor, 1.5.16-capacitor electrode, 17-ceramink substrate, 1B-ground wire, 19.2
0-Signal line (8) Figure 2 Figure 3 Figure 4 Group ``-〇- Figure 5 2 42

Claims (7)

[Claims] (1) In a piezoelectric vibrating device consisting of a piezoelectric vibrating element and two capacitors, one electrode of the capacitors is connected to each other and grounded, and the other electrode of the capacitor is connected to the opposing electrode of the piezoelectric vibrating element, and the piezoelectric A piezoelectric vibrating element device characterized in that signal lines are drawn out from each of opposing electrodes of the vibrating element. (2) In a piezoelectric vibrating device consisting of a piezoelectric vibrating element and two capacitors, one electrode of the capacitor is connected to each other and grounded, and the other electrode of the capacitor is connected to the opposing electrode of the piezoelectric vibrating element. 2. A piezoelectric vibrating element device according to claim 1, wherein opposing electrodes of the element are each connected to a microcomputer. (3) The piezoelectric vibrating element device according to claim 1, characterized in that one terminal for the ground wire and two terminals for the signal line are provided. (4) The piezoelectric vibrating element device according to claim 1, wherein the capacitors are formed on different upper and lower surfaces of the piezoelectric vibrating element. (5) The piezoelectric vibrating element according to claim 1, wherein the capacitor is formed by an interdigital electrode provided on the surface of the piezoelectric vibrating element and an electrode provided on the back surface of the piezoelectric vibrating element. Device. (6) The capacitor is formed by an interdigital electrode provided on the surface of a substrate on which a piezoelectric vibrating element is mounted, and an electrode provided on the back surface of the substrate. piezoelectric vibrating element device. (7) The piezoelectric vibrating element device according to claim 1, wherein the capacitor is formed by electrodes provided above and below the piezoelectric vibrating element, and a capacitor electrode provided on the opposite side of each electrode. .