JP2645996B2 - Frequency modulator - Google Patents
Frequency modulatorInfo
- Publication number
- JP2645996B2 JP2645996B2 JP61248004A JP24800486A JP2645996B2 JP 2645996 B2 JP2645996 B2 JP 2645996B2 JP 61248004 A JP61248004 A JP 61248004A JP 24800486 A JP24800486 A JP 24800486A JP 2645996 B2 JP2645996 B2 JP 2645996B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric resonator
- dielectric
- modulation circuit
- metal case
- coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
【発明の詳細な説明】 〔概要〕 誘電体共振子と、発振器と、変調回路とが金属ケース
中に組み込まれて構成されて周波数変調器において、特
に誘電体共振子と、変調回路における結合スタブとの結
合度との容易な調整を可能とすることを目的とし、発振
器20と、誘電体共振子１と、変調回路21とが金属ケース
８中に取り付けられて構成される周波数変調器におい
て、 金属ケース８の底板中間部上に誘電体共振子１が配置
され、 少なくとも負性抵抗素子と、１側縁に平行な結合スタ
ブ２とを面上に備える誘電体基板11によって発振器を構
成し、 かかる発振器用誘電体基板11は、誘電体共振子の一方
の側の金属ケースの底板上に、結合スタブ２と誘電体共
振子１との間隔が調整されて固定され、 誘電体共振子の他方の側に対応する金属ケースの側板
には、誘電体共振子の側面の略中央部分に対応する位置
に、底板に平行なスリット17が設けられ、 １側縁に平行に配置される結合スタブ５と可変容量ダ
イオード６とを少なくとも備える誘電体基板７は、金属
ケースのスリット17に挿入可能な程度の幅と厚さとを有
する金属板16の１側上に固定されて変調回路を構成し、 かかる変調回路用金属板16は金属ケース８のスリット
17中に挿入され、結合スタブ５と誘電体共振子１の側面
との所望結合度位置で保持手段で保持されるようにす
る。DETAILED DESCRIPTION OF THE INVENTION [Summary] A dielectric resonator, an oscillator, and a modulation circuit are configured to be incorporated in a metal case to form a frequency modulator, in particular, a dielectric resonator and a coupling stub in a modulation circuit. In order to enable easy adjustment of the degree of coupling with the oscillator, the oscillator 20, the dielectric resonator 1, and the modulation circuit 21 are mounted in the metal case 8 in a frequency modulator. A dielectric resonator 1 is arranged on a middle portion of a bottom plate of the metal case 8, and an oscillator is constituted by a dielectric substrate 11 having on its surface at least a negative resistance element and a coupling stub 2 parallel to one side edge, The dielectric substrate 11 for the oscillator is fixed on the bottom plate of the metal case on one side of the dielectric resonator with the distance between the coupling stub 2 and the dielectric resonator 1 being adjusted, and the other of the dielectric resonator Side of the corresponding metal case The plate is provided with a slit 17 parallel to the bottom plate at a position corresponding to a substantially central portion of the side surface of the dielectric resonator. At least the coupling stub 5 and the variable capacitance diode 6 arranged parallel to one side edge are provided. The provided dielectric substrate 7 is fixed on one side of a metal plate 16 having a width and a thickness that can be inserted into the slit 17 of the metal case to constitute a modulation circuit. Case 8 slit
17 and is held by the holding means at a desired degree of coupling between the coupling stub 5 and the side surface of the dielectric resonator 1.
本発明は周波数変調器，例えばマイクロ波帯で使用す
る周波数変調器の改良に関する。The present invention relates to an improvement of a frequency modulator, for example, a frequency modulator used in a microwave band.
一般にマイクロ波帯では誘電帯共振子と発振器の部分
と変調回路の部分とから構成される周波数変調器が多く
使用されているが、変調器として良好な特性を得るには
発振器の部分は安定な発振が行われるように、変調回路
の部分は良好な変調特性が得られるように誘電体共振子
に対しそれぞれ別々に位置調整できることが必要であ
る。Generally, in the microwave band, a frequency modulator composed of a dielectric band resonator, an oscillator part, and a modulation circuit part is often used, but in order to obtain good characteristics as a modulator, the oscillator part must be stable. In order for oscillation to take place, the portions of the modulation circuit need to be individually position-adjustable with respect to the dielectric resonators so as to obtain good modulation characteristics.
第２図は従来例の構成図で、第２図（ａ）は蓋を除去
した時の平面図、第２図（ｂ）は第２図（ａ）に蓋を付
けたもののＡ−Ａ′断面を示す。以下、図により構成を
説明する。尚、C1〜C3は貫通形コンデンサを示す。FIG. 2 is a structural view of a conventional example. FIG. 2 (a) is a plan view showing a state in which a lid is removed, and FIG. 2 (b) is an AA 'of FIG. 2 (a) with a lid. 3 shows a cross section. Hereinafter, the configuration will be described with reference to the drawings. Incidentally, C 1 -C 3 shows a through-type capacitor.
先ず、周波数変調器は第２図（ａ）に示す様に、共振
周波数f0の誘電体共振子１と、これに磁界結合し、一端
に負性抵抗素子（例えば、トランジスタ）３が、他端に
終端抵抗器４を介してλ/4のスタブ12が接続された結合
スタブ２とで構成された発振器と、上記の誘電体共振子
１に磁界結合する結合スタブ５と、この結合スタブの一
端に接続された可変容量ダイオード６とを少なくとも含
む変調回路とで構成されている。First, as a frequency modulator shown in FIG. 2 (a), the dielectric resonator 1 of the resonance frequency f 0, which in magnetically coupled, negative resistance element to one end (e.g., a transistor) 3, other An oscillator composed of a coupling stub 2 having an end connected to a λ / 4 stub 12 via a terminating resistor 4, a coupling stub 5 for magnetically coupling to the dielectric resonator 1, and a coupling stub 5 And a modulation circuit including at least a variable capacitance diode 6 connected to one end.
ここで可変容量ダイオード６にはバイアス電圧を供給
する為にそれぞれλg/4（λｇは誘電体基板上の波長で
ある）の長さの線路9,10と高周波チョークchとで構成さ
れるバイアス供給回路が接続されているが、ａ点より矢
印方向のインピーダンスを高インピーダンスにしてマイ
クロ波がバイアス供給線路を伝播しない様にしている。Here, in order to supply a bias voltage to the variable capacitance diode 6, a bias supply composed of lines 9 and 10 each having a length of λg / 4 (λg is a wavelength on the dielectric substrate) and a high-frequency choke ch is provided. Although the circuit is connected, the impedance in the direction of the arrow is set higher than the point a so that the microwave does not propagate through the bias supply line.
また発振器及び変調回路は金属ケース８に例えば接着
剤で接着されたアルミナ等の誘電体基板11及び７の上に
形成される。The oscillator and the modulation circuit are formed on dielectric substrates 11 and 7 made of, for example, alumina and adhered to the metal case 8 with an adhesive.
更に、誘電体共振子１は第２図（ｂ）に示す様に例え
ば石英ガラス15を介して金属ケース８の底板上に位置微
調整の後に最終的に固定されるが、誘電体共振子の上部
に対応する蓋14の部分にロックナットの付いた金属性の
ネジ13が設けられ、このネジの先端と誘電体共振子との
間隔ｄが小になると誘電体共振子の共振周波数が高くな
り、大きくなると共振周波数は低くなる。Further, as shown in FIG. 2 (b), the dielectric resonator 1 is finally fixed on the bottom plate of the metal case 8 via, for example, a quartz glass 15 after fine adjustment of the position. A metal screw 13 with a lock nut is provided at a portion of the lid 14 corresponding to the upper part, and when the distance d between the tip of this screw and the dielectric resonator becomes smaller, the resonance frequency of the dielectric resonator becomes higher. , The resonance frequency decreases.
この様な構成の周波数変調器を例えば誘電体共振子の
共振周波数f0で安定に発振させるためには、誘電体共振
子１と発振器の結合スタブ２との間隔及び結合スタブと
の結合位置ｂ点を誘電体共振子１の位置の微調整後、変
調回路の可変容量ダイオード６に印加されるバイアス電
圧を変化して、このダイオードの容量を変化させること
により、誘電体共振子１と結合スタブ５との間の磁界結
合に影響を与えて発振周波数を変える。In order to stably oscillate the frequency modulator having such a configuration at the resonance frequency f 0 of the dielectric resonator, for example, the distance between the dielectric resonator 1 and the coupling stub 2 of the oscillator and the coupling position b between the coupling stub and the coupling stub After fine adjustment of the position of the dielectric resonator 1, the bias voltage applied to the variable capacitance diode 6 of the modulation circuit is changed to change the capacitance of this diode. 5 to change the oscillation frequency by affecting the magnetic field coupling.
即ち、発振器を良好な発振状態で動作させる為には誘
電体共振子１を矢印の方向に動かして、結合スタブ２と
の間隔を微調整しなければならない。That is, in order to operate the oscillator in a good oscillation state, the distance between the dielectric resonator 1 and the coupling stub 2 must be finely adjusted by moving the dielectric resonator 1 in the direction of the arrow.
一方、上記の微調整に対応して結合スタブ５と誘電体
共振子１との結合度が新たに変化するが、変調回路は金
属ケース８の予め調整された位置に既に固定されている
のでそれ以後の結合度の調整が出来ないと言う問題点が
ある。On the other hand, the degree of coupling between the coupling stub 5 and the dielectric resonator 1 changes anew in response to the fine adjustment described above. However, since the modulation circuit is already fixed to the metal case 8 at a previously adjusted position, the There is a problem that the degree of coupling cannot be adjusted thereafter.
上記問題点は本発明により第１図に示す如く発振器20
と、誘電体共振子１と、変調回路21とが金属ケース８中
に取り付けられて構成される周波数変調器において、
金属ケース８の底板中間部上に誘電体共振子１が配置さ
れ、 少なくとも負性抵抗素子と、１側縁に平行な結合スタ
ブ２とを面上に備える誘電体基板11によって発振器を構
成し、 かかる発振器用誘電体基板11は、誘電体共振子の一方
の側の金属ケースの底板上に、結合スタブ２と誘電体共
振子１との間隔が調整されて固定され、 誘電体共振子の他方の側に対応する金属ケースの側板
には、誘電体共振子の側面の略中央部分に対応する位置
に、底板に平行なスリット17が設けられ、 １側縁に平行に配置される結合スタブ５と可変容量ダ
イオード６とを少なくとも備える誘電体基板７は、金属
ケースのスリット17に挿入可能な程度の幅と厚さとを有
する金属板16の１側上に固定されて変調回路を構成し、 かかる変調回路用金属板16には金属ケース８のスリッ
ト17中に挿入され、結合スタブ５と誘電体共振子１の側
面との所望結合度位置で保持手段で保持されることを特
徴とする周波数変調器によって解決される。The above problem is solved by the present invention as shown in FIG.
, A dielectric resonator 1 and a modulation circuit 21 mounted in a metal case 8 in a frequency modulator,
A dielectric resonator 1 is arranged on a middle portion of a bottom plate of the metal case 8, and an oscillator is constituted by a dielectric substrate 11 having on its surface at least a negative resistance element and a coupling stub 2 parallel to one side edge, The dielectric substrate 11 for the oscillator is fixed on the bottom plate of the metal case on one side of the dielectric resonator with the distance between the coupling stub 2 and the dielectric resonator 1 being adjusted, and the other of the dielectric resonator A slit 17 parallel to the bottom plate is provided at a position corresponding to a substantially central portion of the side surface of the dielectric resonator on the side plate of the metal case corresponding to A dielectric substrate 7 including at least a capacitor 6 and a variable capacitance diode 6 is fixed on one side of a metal plate 16 having a width and a thickness that can be inserted into the slit 17 of the metal case to constitute a modulation circuit. The metal plate 16 for the modulation circuit has a metal case 8 Is inserted into the slit 17, it is solved by the frequency modulator, characterized in that it is held by the holding means at the desired degree of coupling positions of the side surface of the coupling stub 5 and the dielectric resonator 1.
本発明では誘電体基板11上で、少なくとも負性抵抗素
子と結合スタブ２とが配置される発振器における結合ス
タブ２と、誘電体共振子１との結合度は、誘電体共振子
に対する結合スタブの位置を金属ケースの底板上におい
て誘電体基板11を移動させることによって調整し、調整
後は誘電体基板11は金属ケースの底板上に固定される。In the present invention, the coupling degree between the coupling stub 2 and the dielectric resonator 1 in the oscillator in which at least the negative resistance element and the coupling stub 2 are arranged on the dielectric substrate 11 is determined by the coupling stub with respect to the dielectric resonator. The position is adjusted by moving the dielectric substrate 11 on the bottom plate of the metal case. After the adjustment, the dielectric substrate 11 is fixed on the bottom plate of the metal case.
これに対し少なくとも可変容量ダイオード６と結合ス
タブ５とを備える誘電体基板７はさらに金属板16上に固
定されて変調回路を構成すると共に金属ケースの１側板
には誘電体共振子の側面の略中央部分に対応する位置に
変調回路用金属板16の挿入可能な程度のスリットが設け
られ、変調回路用金属板16はこのスリット中に金属ケー
ス内に向かう方向に移動され、変調回路の結合スタブ５
と誘電体共振子１との間隔が所望の結合度となった位置
でネジ等保持手段で保持される。On the other hand, the dielectric substrate 7 including at least the variable capacitance diode 6 and the coupling stub 5 is further fixed on the metal plate 16 to form a modulation circuit, and one side plate of the metal case has a substantially side surface of the dielectric resonator. A slit is provided at a position corresponding to the central portion so that the modulation circuit metal plate 16 can be inserted.The modulation circuit metal plate 16 is moved in the slit toward the inside of the metal case, and a coupling stub of the modulation circuit is provided. 5
At a position where the distance between the substrate and the dielectric resonator 1 has a desired degree of coupling, it is held by a holding means such as a screw.
この場合変調回路用金属板16はスリットに挿入可能な
程度の幅と厚さとを有するので変調回路の結合スタブ５
は誘電体共振子に対し正しい位置を保持して移動され、
調整後はスリット中で保持手段で保持されるので保持位
置の変調の生ずることはない。In this case, since the modulation circuit metal plate 16 has a width and a thickness that can be inserted into the slit, the coupling stub 5 of the modulation circuit is used.
Is moved while maintaining the correct position with respect to the dielectric resonator,
After the adjustment, the holding position is held by the holding means in the slit, so that the holding position is not modulated.
即ち誘電体共振子に対する発振器と変調回路とにおけ
る結合度調整が別個に、しかもそれぞれ正確に容易に行
なわれ、さらに変調回路はその後の変動特性の変化に対
しても再度の調整が可能となる。That is, the degree of coupling between the oscillator and the modulation circuit for the dielectric resonator can be adjusted separately and easily and accurately, and the modulation circuit can be adjusted again for a subsequent change in the fluctuation characteristics.
第１図は本発明の構成図で、第１図（ａ）は蓋を除去
した時の平面図、第１図（ｂ）は第１図（ａ）に蓋を付
けたもののＢ−Ｂ′断面図を示す。FIG. 1 is a structural view of the present invention. FIG. 1 (a) is a plan view showing a state in which a lid is removed, and FIG. 1 (b) is a view of FIG. FIG.
なお全図を通じて同一符号は同一対象物を示す。 The same reference numerals indicate the same objects throughout the drawings.
即ち第１図において金属ケース８の底板中間部分上に
は図示の如く誘電体共振子１が石英ガラス15を介して固
定される。That is, in FIG. 1, the dielectric resonator 1 is fixed on the middle portion of the bottom plate of the metal case 8 through the quartz glass 15 as shown in FIG.
また誘電体共振子１の一方の側には発振器20が配置さ
れるが、これは誘電体基板11面上において、その１側縁
に平行な結合スタブ２と、その１端の負性抵抗素子３
と、他端の終端抵抗４を介するλ/4のスタブ12とを備
え、結合スタブ２と誘電体共振子１との関係位置が調整
された後、発振器用誘電体基板11は金属ケース８の底板
上に固定される。On one side of the dielectric resonator 1, an oscillator 20 is provided. On the surface of the dielectric substrate 11, a coupling stub 2 parallel to one side edge thereof and a negative resistance element at one end thereof are provided. 3
And a stub 12 of λ / 4 via the terminating resistor 4 at the other end. After the relative position between the coupling stub 2 and the dielectric resonator 1 is adjusted, the oscillator dielectric substrate 11 is It is fixed on the bottom plate.
一方誘電体基板７上にはその１側縁に平行に配置され
る結合スタブ５と可変容量ダイオード６のほか、バイア
ス電圧を供給するため線路9,10及び高周波チョークchを
有するバイアス供給回路を備え、この誘電体基板７はさ
らに金属板16上に固定されて変調回路21を構成する。On the other hand, on the dielectric substrate 7, a bias supply circuit having lines 9, 10 and a high-frequency choke ch for supplying a bias voltage is provided in addition to the coupling stub 5 and the variable capacitance diode 6 arranged parallel to one side edge thereof. The dielectric substrate 7 is further fixed on the metal plate 16 to form the modulation circuit 21.
そして誘電体共振子の他方の側に対面する金属ケース
の側板には底面に平行なスリット17が設けられ、このス
リットの幅と高さは変調回路用金属板16の挿入可能な程
度の大きさとなっている。The side plate of the metal case facing the other side of the dielectric resonator is provided with a slit 17 parallel to the bottom surface, and the width and height of the slit are large enough to insert the metal plate 16 for the modulation circuit. Has become.
かかる変調回路の金属板16は図示の如く金属ケースの
側板のスリット中に挿入され、金属板16を矢印方向に移
動し、誘電体共振子１と結合スタブ５との間隔を所望の
結合度となるように調整し、調整後ネジ18等保持手段で
金属板16はスリット17中に保持される。The metal plate 16 of such a modulation circuit is inserted into the slit of the side plate of the metal case as shown in the figure, moves the metal plate 16 in the direction of the arrow, and adjusts the distance between the dielectric resonator 1 and the coupling stub 5 to a desired coupling degree. After adjustment, the metal plate 16 is held in the slit 17 by holding means such as the screw 18.
即ち本発明によれば発振器の結合スタブ２と誘電体共
振子１との関係位置調整は金属ケースの底板上における
発振器用誘電体基板11の移動によって、また変調回路の
結合スタブ５と誘電体共振子との関係位置調整は金属ケ
ースのスリット17中で変調回路用誘電体基板７の移動に
よってそれぞれ行なわれ、誘電体共振子に対する発振器
と、変調回路との結合度調整が別個に正確に、かつ容易
に行われ、しかも変調回路と誘電体共振子との再調整も
変調回路用金属板をスリット中で再度移動させることに
よって可能となる。That is, according to the present invention, the relative position between the coupling stub 2 of the oscillator and the dielectric resonator 1 is adjusted by moving the dielectric substrate 11 for the oscillator on the bottom plate of the metal case, and by adjusting the coupling stub 5 of the modulation circuit and the dielectric resonator. Position adjustment with respect to the resonator is performed by moving the modulation circuit dielectric substrate 7 in the slit 17 of the metal case, and adjustment of the degree of coupling between the oscillator for the dielectric resonator and the modulation circuit is performed separately and accurately. It is easily performed, and readjustment of the modulation circuit and the dielectric resonator can be performed by moving the modulation circuit metal plate again in the slit.
以上詳細に説明した様に本発明によれば変調回路と誘
電体共振子との結合度を容易に変化させることができる
と言う効果がある。As described in detail above, according to the present invention, there is an effect that the degree of coupling between the modulation circuit and the dielectric resonator can be easily changed.
これにより周波数変調器は安定な発振状態、良好な変
調特性で動作することができる。This allows the frequency modulator to operate in a stable oscillation state and good modulation characteristics.
第１図は本発明の実施例の構成図、 第２図は従来例の構成図を示す。 図において、 １は誘電体共振子、 20は発振器、 21は変調回路を示す。 FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional example. In the figure, 1 is a dielectric resonator, 20 is an oscillator, and 21 is a modulation circuit.
Claims (1)
21とが金属ケース８中に取り付けられて構成される周波
数変調器において、 金属ケース８の底板中間部上に誘電体共振子１が配置さ
れ、 少なくとも負性抵抗素子と、１側縁に平行な結合スタブ
２とを面上に備える誘電体基板11によって発振器を構成
し、 かかる発振器用誘電体基板11は、誘電体共振子の一方の
側の金属ケースの底板上に、結合スタブ２と誘電体共振
子１との間隔が調整されて固定され、 誘電体共振子の他方の側に対応する金属ケースの側板に
は、誘電体共振子の側面の略中央部分に対応する位置
に、底板に平行なスリット17が設けられ、 １側縁に平行に配置される結合スタブ５と可変容量ダイ
オード６とを少なくとも備える誘電体基板７は、金属ケ
ースのスリット17に挿入可能な程度の幅と厚さとを有す
る金属板16の１側上に固定されて変調回路を構成し、 かかる変調回路用金属板16は金属ケース８のスリット17
中に挿入され、結合スタブ５の誘電体共振子１の側面と
の所望結合度位置で保持手段で保持されることを特徴と
する周波数変調器。1. An oscillator 20, a dielectric resonator 1, and a modulation circuit
21 is mounted in the metal case 8 in which the dielectric resonator 1 is disposed on the middle portion of the bottom plate of the metal case 8, and at least the negative resistance element and the dielectric resonator 1 are parallel to one side edge. An oscillator is constituted by a dielectric substrate 11 having a coupling stub 2 on a surface thereof. Such an oscillator dielectric substrate 11 is provided on a bottom plate of a metal case on one side of a dielectric resonator by coupling stub 2 and dielectric The distance from the resonator 1 is adjusted and fixed, and the side plate of the metal case corresponding to the other side of the dielectric resonator is parallel to the bottom plate at a position corresponding to substantially the center of the side surface of the dielectric resonator. The dielectric substrate 7 provided with at least the coupling stub 5 and the variable capacitance diode 6 which are provided in parallel with one side edge and having a width and a thickness that can be inserted into the slit 17 of the metal case. On one side of the metal plate 16 Is constant constitute a modulation circuit, such modulation circuit metal plate 16 slit 17 of the metal case 8
A frequency modulator which is inserted in the antenna and held by holding means at a desired coupling position between the coupling stub 5 and the side surface of the dielectric resonator 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61248004A JP2645996B2 (en) | 1986-10-17 | 1986-10-17 | Frequency modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61248004A JP2645996B2 (en) | 1986-10-17 | 1986-10-17 | Frequency modulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63102404A JPS63102404A (en) | 1988-05-07 |
| JP2645996B2 true JP2645996B2 (en) | 1997-08-25 |
Family
ID=17171758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61248004A Expired - Lifetime JP2645996B2 (en) | 1986-10-17 | 1986-10-17 | Frequency modulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2645996B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5398765A (en) * | 1977-01-26 | 1978-08-29 | Matsushita Electric Ind Co Ltd | Oscillator |
| JPS55147811A (en) * | 1979-05-08 | 1980-11-18 | Oki Electric Ind Co Ltd | Frequency control solid oscillator |
| JPS5726112B2 (en) * | 1978-04-27 | 1982-06-02 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726112U (en) * | 1980-07-21 | 1982-02-10 |
-
1986
- 1986-10-17 JP JP61248004A patent/JP2645996B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5398765A (en) * | 1977-01-26 | 1978-08-29 | Matsushita Electric Ind Co Ltd | Oscillator |
| JPS5726112B2 (en) * | 1978-04-27 | 1982-06-02 | ||
| JPS55147811A (en) * | 1979-05-08 | 1980-11-18 | Oki Electric Ind Co Ltd | Frequency control solid oscillator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63102404A (en) | 1988-05-07 |
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