JPS6330008A - Voltage controlled oscillation circuit - Google Patents

Voltage controlled oscillation circuit

Info

Publication number
JPS6330008A
JPS6330008A JP17300886A JP17300886A JPS6330008A JP S6330008 A JPS6330008 A JP S6330008A JP 17300886 A JP17300886 A JP 17300886A JP 17300886 A JP17300886 A JP 17300886A JP S6330008 A JPS6330008 A JP S6330008A
Authority
JP
Japan
Prior art keywords
varactor diode
oscillation circuit
capacitor
voltage
frequency
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.)
Granted
Application number
JP17300886A
Other languages
Japanese (ja)
Other versions
JPH0783213B2 (en
Inventor
Toshiaki Tamura
田村　俊昭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP61173008A priority Critical patent/JPH0783213B2/en
Publication of JPS6330008A publication Critical patent/JPS6330008A/en
Publication of JPH0783213B2 publication Critical patent/JPH0783213B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE:To form a voltage controlled oscillation circuit and to obtain a high carrier noise characteristic by providing a capacitor and a varactor diode between a ring-shaped microstrip line and ground and connecting one end of the varactor diode to ground. CONSTITUTION:In order to vary the oscillating frequency by a voltage, the varactor diode 11 is connected between an adjusting capacitor 12 and ground at a part of the tuning circuit. A voltage is impressed from an input terminal 9 to the varactor diode 11 through a coil 10, the capacitance change in the varactor diode 11 with respect to the voltage change is used to change the oscillation frequency. Further, the varactor diode 11 and the adjustment capacitor 12 are provided at the opposite side to the coupling capacitor 15 with the oscillation circuit 16 so as to prevent the reduction in the Q of the oscillation circuit 16 thereby improving the oscillated output and the carrier/noise ratio (C/N). Further, since the coil 10 is low in the impedance to the oscillated frequency and high to the low frequency, the effect on the noise is less.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は自動車電話、コードレス電話等に用いる電圧制
御発振回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a voltage controlled oscillator circuit used in automobile telephones, cordless telephones, and the like.

従来の技術 従来のマイクロストリップラインを用いた電圧制御発振
回路では第２図のように入力端子１にコイル２を介して
バラクタ−ダイオード３とコンダン＋ｊ−４の接続点全
接続し、リング状のマイクロストリップライン６の開口
部の一方をバラクタ−ダイオード３に他方をコンデンサ
ー４に接続し共振回路を構成し、マイクロストリップラ
イン５の他方を高周波コイル６を介してアースするとと
もに結合容量７を介して発振回路部８に接続して構成し
ていた。これは、バラクタ−ダイオード３に電圧を印加
しバラクタ−ダイオード３の容量を変化させ発振周波数
を制御するもので、このバラクタ−ダイオード３に電圧
を印加させるために、リング状マイクロストリップライ
ン５とアース間に高周波コイル６を設けている。BACKGROUND OF THE INVENTION In a conventional voltage controlled oscillator circuit using a microstrip line, as shown in Fig. 2, all connection points of a varactor diode 3 and a conductor +j-4 are connected to an input terminal 1 via a coil 2, and a ring-shaped One of the openings of the microstrip line 6 is connected to the varactor diode 3 and the other to the capacitor 4 to form a resonant circuit, and the other end of the microstrip line 5 is grounded via the high frequency coil 6 and connected via the coupling capacitor 7. It was configured by being connected to the oscillation circuit section 8. This applies a voltage to the varactor diode 3 and changes the capacitance of the varactor diode 3 to control the oscillation frequency. A high frequency coil 6 is provided between them.

発明が解決しようとする問題点 このような従来の回路ではバラクタ−ダイオード３に電
圧を印加させるために高周波コイル６が必要であり、こ
れを付加することにより回路が不安定となり異状発振を
おこしたり、又コストアップにもなるといった問題があ
った。Problems to be Solved by the Invention In such a conventional circuit, a high frequency coil 6 is required to apply voltage to the varactor diode 3, and adding this causes the circuit to become unstable and cause abnormal oscillation. Moreover, there was a problem that the cost would increase.

本発明は以上のような問題点を除去するために高周波コ
イルを用いずバラクタ−ダイオードに電圧を印加し発振
周波数を制御する電圧制御発振回路を提供することを目
的とすＳものである。SUMMARY OF THE INVENTION In order to eliminate the above-mentioned problems, it is an object of the present invention to provide a voltage-controlled oscillation circuit that controls the oscillation frequency by applying voltage to a varactor diode without using a high-frequency coil.

問題点を解決するための手段 上記問題点を解決するために本発明は、リング状マイク
ロストリップラインとアース間にバラクタ−ダイオード
を設は高周波コイルを用いず周波数制御を可能にしたも
のである。Means for Solving the Problems In order to solve the above problems, the present invention provides a varactor diode between the ring-shaped microstrip line and the ground, thereby making it possible to control the frequency without using a high-frequency coil.

作用 本発明は上記した構成により、リング状マイクロストリ
ップラインとアース間にコンデンサーとバラクタ−ダイ
オードを設け、バラクタ−ダイオードの１端をアースに
接地することによりバラクタ−ダイオードに電圧が印加
できバラクタ−ダイオードの容量変化により、発振周波
数を制御できることになる。Operation The present invention has the above-described configuration, and a capacitor and a varactor diode are provided between the ring-shaped microstrip line and the ground, and by grounding one end of the varactor diode, a voltage can be applied to the varactor diode. The oscillation frequency can be controlled by changing the capacitance of .

実施例 以下、本発明の実施例を図面を用いて説明する。Example Embodiments of the present invention will be described below with reference to the drawings.

第１図は本発明の電圧制御発振回路の１実施例の回路図
を示す。FIG. 1 shows a circuit diagram of one embodiment of the voltage controlled oscillation circuit of the present invention.

第１図において、９は入力端子であり、この入力端子９
にはコイル１０を介してバラクタ−ダイオード１１と、
このバラクタ−ダイオード１１の同調回路に対する変化
量の調整用コンデンサー１２が接続され、上記バラクタ
−ダイオード１１はアースされ、調整用コンデンサー１
２はリング形マイクロストリップライン１３の開口部の
一端に接続されている。このリング形マイクロストリッ
プライン１３の両開口部間にはコンデンサー１４が接続
されている。また、このリング形マ・イクロストリップ
ライン１３の開口部の他方は結合容量１５を介して、発
振トランジスタ、複数の抵抗とコンデンサーからなるコ
レクタ接地型（７）コルピッツタイプの発振回路部１６
が接読されている。In FIG. 1, 9 is an input terminal, and this input terminal 9
a varactor diode 11 via a coil 10,
A capacitor 12 for adjusting the amount of change in the tuning circuit of this varactor diode 11 is connected, and the varactor diode 11 is grounded.
2 is connected to one end of the opening of the ring-shaped microstrip line 13. A capacitor 14 is connected between both openings of this ring-shaped microstrip line 13. The other side of the opening of the ring-shaped micro-strip line 13 is connected via a coupling capacitor 15 to a common-collector type (7) Colpitts-type oscillation circuit section 16 consisting of an oscillation transistor, a plurality of resistors, and a capacitor.
is read directly.

なお、リング形マイクロストリップライン１３゜バラク
タ−ダイオード１１．調整用コンデンサー１２、コンデ
ンサー１４により同調回路部を構成している。In addition, a ring-shaped microstrip line 13° varactor diode 11. The adjustment capacitor 12 and the capacitor 14 constitute a tuning circuit section.

このような構成の電圧制御発振回路において、発振周波
数を電圧により可変するために同調回路の一部にバラク
タ−ダイオード１１を調整用コンデンサー１２とアース
間に接続する。このバラクタ−ダイオード１１に入力端
子９からコイル１０を通して電圧を印加（〜電圧変化に
対する・くラフターダイオード１１の容量変化を利用し
発振周波数を変化させることができる。また、このバラ
クタ−ダイオード１１と調整用コンデンサー１２を発振
回路部１６との結合容量１６との反対側に設けることに
より、発振回路部１６のＱを低下させないため発振出力
及びキャリヤ／ノイズ・比（以下Ｃ／Ｎという）が良く
なる。コイル１０は発振周波数に対し、インピーダンス
が高く、低周波に対しインピーダンスが低くなるため、
ノイズに対し影響が少ないため用いる。In the voltage controlled oscillator circuit having such a configuration, a varactor diode 11 is connected between the adjustment capacitor 12 and the ground as part of the tuning circuit in order to vary the oscillation frequency by voltage. A voltage is applied to this varactor diode 11 from the input terminal 9 through the coil 10 (~The oscillation frequency can be changed by using the capacitance change of the Crafter diode 11 in response to voltage change. By providing the capacitor 12 on the side opposite to the coupling capacitance 16 with the oscillation circuit section 16, the oscillation output and carrier/noise ratio (hereinafter referred to as C/N) are improved because the Q of the oscillation circuit section 16 is not reduced. .The coil 10 has a high impedance for the oscillation frequency and a low impedance for the low frequency.
Used because it has little effect on noise.

発明の効果 以上述べてきたように本発明によれば高周波コイルを用
いず電圧制御発振回路が作成可能でかつ高キャリア／ノ
イズ特性得られ実用的にきわめて有用である。Effects of the Invention As described above, according to the present invention, it is possible to create a voltage controlled oscillation circuit without using a high frequency coil, and high carrier/noise characteristics can be obtained, which is extremely useful in practice.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例における電圧制御発振回路の
電気的回路図、第２図は従来の電気的回路図である。 ９・・・・・・入力端子、１０・・・・・・コイル、１
１・・印・バラクタ−ダイオード、１２・・・・・・調
整用コンデンサー、１３・・・・・・リング形マイクロ
ストリップライン、１４・・・・・・コンデンサー、１
５・・・・・結合容量、１ｅ・・・・・・発振回路部。FIG. 1 is an electrical circuit diagram of a voltage controlled oscillation circuit according to an embodiment of the present invention, and FIG. 2 is a conventional electrical circuit diagram. 9...Input terminal, 10...Coil, 1
1...Varactor diode, 12...Adjustment capacitor, 13...Ring-shaped microstrip line, 14...Capacitor, 1
5... Coupling capacitance, 1e... Oscillation circuit section.

Claims (1)

【特許請求の範囲】[Claims] リング状マイクロストリップラインとコンデンサーで同
調回路を形成し発振回路との結合容量部と反対側にリン
グ形マイクロストリップラインとアース間にバラクター
ダイオードを設けてなる電圧制御発振回路。A voltage controlled oscillation circuit in which a ring-shaped microstrip line and a capacitor form a tuned circuit, and a varactor diode is provided between the ring-shaped microstrip line and ground on the opposite side of the coupling capacitance section with the oscillation circuit.
JP61173008A 1986-07-23 1986-07-23 Voltage controlled oscillator Expired - Lifetime JPH0783213B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61173008A JPH0783213B2 (en) 1986-07-23 1986-07-23 Voltage controlled oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61173008A JPH0783213B2 (en) 1986-07-23 1986-07-23 Voltage controlled oscillator

Publications (2)

Publication Number Publication Date
JPS6330008A true JPS6330008A (en) 1988-02-08
JPH0783213B2 JPH0783213B2 (en) 1995-09-06

Family

ID=15952484

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61173008A Expired - Lifetime JPH0783213B2 (en) 1986-07-23 1986-07-23 Voltage controlled oscillator

Country Status (1)

Country Link
JP (1) JPH0783213B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5969692A (en) * 1996-06-04 1999-10-19 Nec Corporation Antenna support fabric
KR20030070955A (en) * 2002-02-27 2003-09-03 한국전자통신연구원 Resonator circuit using ring resonator, voltage controlled oscillator using the same and structure for disposing voltage controlled oscillator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58139502A (en) * 1982-02-15 1983-08-18 Anritsu Corp Resonator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58139502A (en) * 1982-02-15 1983-08-18 Anritsu Corp Resonator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5969692A (en) * 1996-06-04 1999-10-19 Nec Corporation Antenna support fabric
KR20030070955A (en) * 2002-02-27 2003-09-03 한국전자통신연구원 Resonator circuit using ring resonator, voltage controlled oscillator using the same and structure for disposing voltage controlled oscillator

Also Published As

Publication number Publication date
JPH0783213B2 (en) 1995-09-06

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