JPS6128204A - Hybrid integrated circuit oscillator - Google Patents

Abstract

PURPOSE:To attain ease of adjusting operation of the user of a communication equipment by providing a cylindrical insulator to a wall face of an oscillator case through which a metallic body adjusting an oscillating frequency so as to adjust the oscillating frequency without losing the airtightness in the oscillator. CONSTITUTION:A dielectric resonator 6 and a semiconductor chip 7 are mounted on a metallic base 1 subjected to airtight sealing via a cap 2 through a ceramic base 3. An adjusting screw 8 adjusting the oscillating frequency fitted in the insulation cylinder 11 fixed on the cap 2 in advance by an adhesives. The surrounding of an electrode 5 led externally is subjected to airtight sealing by a glass sealing member 5. Thus, the adjusting screw 8 and the inside of oscillator are parted airtightly via the insulation cylinder 11 and the user of the communication equipment adjusts the oscillating frequency without losing the airtightness of the inside of the oscillator and troublesome load such as airtight sealing after adjustment is relieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an oscillator used for communications, and particularly to a hybrid integrated circuit oscillator using a dielectric resonator.

[Prior art]

Conventionally, a dielectric resonator is usually used as a local oscillator used in a frequency range of several GHz or more because the oscillator frequency is stable and the circuit configuration is simple (two reasons). For example, a configuration as shown in FIG.
A metal adjustment screw 18 is mounted on the cap 12 to adjust the oscillation frequency. In addition, 19 is a sealing resin that hermetically seals the periphery of the screw 18, 15 is an extraction electrode to the outside, and 14 is a glass sealing material that hermetically seals the periphery of the extraction electrode 15.

However, such an oscillator requires fine adjustment of the oscillation frequency due to variations in the quality of the dielectric resonator 16, variations in the characteristics of circuit components such as the semiconductor chip 17 and circuit patterns, and variations in the characteristics of the external circuit due to the load on the output side. Although this is absolutely necessary, fine adjustment for this purpose is carried out by the user who handles the communication device after the oscillator is incorporated into the communication device along with other parts. That is, the user uses the communication device ζ: First, adjust the adjustment screw 18 to finely adjust the oscillation frequency of the dielectric resonator 16, and then apply sealing resin 19 around the screw 18 to seal the inside of the oscillator. The device is hermetically sealed.

In the conventional C2 oscillator, the user is burdened with the troublesome task of hermetic sealing, and furthermore, since there are an unspecified number of users, uniformity of the hermetic sealing work cannot be expected, resulting in uncertain airtightness. This has the drawback of making the quality of the oscillator unstable.

In order to solve these drawbacks, for example, an oscillator having a configuration as shown in FIG. To expand or contract by means:
Second, the oscillator is constructed so that the oscillation frequency can be finely adjusted without impairing the airtightness inside the oscillator. However, in such a configuration, although the airtightness inside the oscillator is completely maintained and the quality is stable, it also requires an expensive bellows and its operation means, which has the disadvantage of significantly increasing the product cost. there were.

[Object of the Invention] The object of the present invention is to overcome such drawbacks and provide a cylindrical insulator on the wall of the oscillator container through which the frequency adjustment metal body passes, thereby increasing the oscillation frequency without impairing the airtightness inside the oscillator. (1) To provide a hybrid integrated circuit oscillator that can be easily adjusted and manufactured at low cost (C2).

[Structure of the invention]

According to the hybrid integrated circuit oscillator according to the present invention, a dielectric resonator C2 is housed in a container, and a hermetically sealed oscillator C2 is provided with a metal body penetrating the container and adjusting the oscillation frequency of the resonator. an insulator is provided on the wall surface of the container through which the metal body penetrates to airtightly isolate the resonator and the metal body, so that the metal body can be operated without impairing the airtightness inside the oscillator. has been done.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of essential parts showing an example of a hybrid integrated circuit oscillator according to the present invention.

In FIG. 1, 6 arrays (= 7 are ceramic resonators and semiconductor chips mounted on a metal substrate 1 hermetically sealed via a cap 2, 8 is a cap) This is an adjustment screw for adjusting the oscillation frequency installed in an insulating cylinder 11 fixed in advance with adhesive on 2. Note that 5 is an external extraction electrode, and 4 is an airtight seal around the extraction electrode 5. is the lath seal material.

With this configuration, the adjustment screw 8 and the inside of the oscillator are airtightly isolated via the insulating tube 11, so the user of the communication device can adjust the oscillation frequency without damaging the airtightness inside the oscillator. At the same time, it is possible to make adjustments to
Furthermore, the troublesome burden of airtight sealing after adjustment can be relieved. Furthermore, the insulating cylinder 11 for airtightness can be produced in large quantities and at low cost by molding a material such as resin, so that the manufacturing cost of the oscillator can be reduced.

〔Effect of the invention〕

As explained above, according to the hybrid integrated circuit oscillator of the present invention, by providing a cylindrical insulator on the wall of the oscillator container through which the metal body for adjusting the oscillation frequency passes, the airtightness inside the oscillator is not impaired. Since the oscillation frequency can be adjusted, it facilitates the adjustment operation by the user of the communication device (2, further: 2) It has the advantage of relieving the troublesome burden of hermetic sealing that was previously required. Furthermore, since airtightness is ensured in this way, the quality of the oscillator,
This has the advantage of greatly improving reliability. Further, since the cylindrical insulator for airtightness can be manufactured in large quantities at low cost, there is an advantage that the manufacturing cost of the oscillator can be reduced.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of a hybrid integrated circuit oscillator according to the present invention, FIG. 2 is a cross-sectional view of a main part showing an example of a conventional device, and FIG. FIG. 3 is a sectional view of a main part showing an example different from the one shown in the figure. 1.11...Metal substrate 2.12...Cap 6.16...Ceramic substrate 4.14...Glass sealing material 5.15...External extraction electrode 6.16...Dielectric Body resonator 7, 17...Semiconductor chip 8.18...Metal screw 9.19...Sealing resin 20...Metal bellows Patent applicant NEC Corporation Figure 1 171

Claims (1)

[Claims] In a hermetically sealed oscillator comprising a dielectric resonator housed in a container and a metal body penetrating the container and adjusting the oscillation frequency of the resonator, the wall surface of the container through which the metal body penetrates has the A hybrid integrated circuit oscillator characterized by being provided with an insulator that airtightly isolates a resonator and a metal body.