JPH07336141A - Oscillator - Google Patents

Abstract

PURPOSE:To appropriately control a temperature based on the temperature of an oscillation element by providing the oscillation element and a control element and incorporating a temperature detection part on the surface on the oscillation element side of the control element. CONSTITUTION:Insulation resin 13 is provided between the control element 4 and a crystal oscillator 1, the adhesion strength of both is strengthened by the insulation resin 13 and also, the heat of the crystal oscillator is easily transmitted to the temperature detection part of the control element 4 through the insulation resin 13. Also, the insulation resin 14 provided on the outer periphery of the crystal oscillator 1 and the control element 4 is provided with a function for radiating the heat of the control element 4 itself. By the constitution, since the temperature detection part directly detects the temperature of the oscillation element opposite to it, the temperature is appropriately controlled based on the actual temperature of the oscillation element and as a result, the temperature is accurately controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature compensation oscillator.

[0002]

2. Description of the Related Art In this conventional oscillator, an oscillating element and its temperature control element are mounted on a substrate, and an ambient temperature in the vicinity of the oscillating element is detected by a temperature detecting section provided in the control element. The oscillation element is designed to oscillate almost constantly regardless of the temperature.

[0003]

However, in the above-mentioned conventional device, the accurate temperature cannot be instantaneously detected when the temperature of the oscillating element suddenly changes, and the oscillation cannot be stabilized by the temperature control. was there. That is, the temperature detection unit of the control element detects the ambient temperature in the vicinity thereof, and when the oscillation element undergoes a rapid temperature change, if there is a time lag until the ambient temperature reaches the temperature of the oscillation element,
Since the temperature of the oscillation element is not always detected correctly, it is difficult to keep the oscillation frequency at a desired value.

Therefore, the present invention has an object of more accurately controlling the temperature of the oscillation element.

[0005]

In order to achieve this object, the present invention mounts a control element on the surface of an oscillating element, and the temperature detecting section is provided on the oscillating element side surface of the control element. Is built in.

[0006]

With the above-mentioned structure, the temperature detecting section provided in the control element directly detects the temperature of the oscillating element facing the temperature detecting section, so that the temperature is appropriately controlled based on the actual temperature of the oscillating element. As a result, accurate temperature control is performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a crystal oscillator, which is inserted from the upper surface and output electrodes 2 and 3 are drawn out. A plurality of electrodes are provided on the upper surface of the crystal resonator 1 in addition to the input and output electrodes 2 and 3, and these electrodes extend through the side surfaces to the lower surface of the crystal resonator 1. The electrodes 5 provided on the control element 4 as shown in FIG. 2 are soldered to these electrodes (generally referred to as flip-chip mounting).

As shown in FIG. 2, the control element 4 has a temperature detecting section 6 built in at the center of its lower surface, and has an A on its outer periphery.
D converter 7, oscillation circuit section 8, voltage control section 9, DA converter 10, power supply regulator section 11, ROM section 1
2 is built in.

These parts 6 to 12 of the control element 4 are shown in FIG.
When the temperature of the crystal unit 1 is detected by the temperature detection unit 6, the oscillation frequency of the crystal unit 1 is set to the desired oscillation frequency via the oscillation circuit unit 8 based on the detected temperature. It is for feedback control.

In FIG. 1, reference numeral 13 denotes an insulating resin provided between the control element 4 and the crystal unit 1. The insulating resin 13 enhances the bonding strength between the two, and at the same time, the crystal is interposed through the insulating resin 13. The heat of the vibrator 1 is easily transferred to the temperature detection unit 6 of the control element 4. Also, the crystal unit 1
And the insulating resin 14 provided on the outer periphery of the control element 4
It has the role of dissipating its own heat. That is, since the oscillation circuit section 8 of the control element 4 and the power supply regulator section 11 generate heat, they are radiated to the outside air via the resin 14 and the outer peripheral shield cover 15. Further, by providing the shield cover 15, the control element 4 and the crystal resonator 1 are also shielded.

[0011]

As described above, according to the present invention, the control element is mounted on the surface of the oscillating element, and the temperature detecting section is built in the oscillating element side surface of the control element.

With the above arrangement, the temperature detecting section provided in the control element directly detects the temperature of the oscillating element facing the temperature detecting section. Temperature control is performed, and as a result, accurate temperature control is performed.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a perspective view of the control element.

FIG. 3 is a circuit diagram of the control element.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Crystal oscillator 4 Control element 6 Temperature detection part 13 Insulating resin provided between the crystal oscillator 1 and the control element 14 Insulating resin provided on the outer periphery of the crystal oscillator 1 and the control element 4

Claims (3)

[Claims] 1. An oscillator comprising an oscillating element and a control element mounted on the surface of the oscillating element, wherein the surface of the control element on the oscillating element side has a built-in temperature detector. 2. The oscillator according to claim 1, wherein an insulating resin is interposed between the oscillation element and the control element. 3. The shield cover is provided around the oscillation element and the control element with an insulating resin interposed therebetween.
Oscillator.