JP2002335125A - Voltage-controlled oscillator and communication device using the same - Google Patents
Voltage-controlled oscillator and communication device using the sameInfo
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- JP2002335125A JP2002335125A JP2001317349A JP2001317349A JP2002335125A JP 2002335125 A JP2002335125 A JP 2002335125A JP 2001317349 A JP2001317349 A JP 2001317349A JP 2001317349 A JP2001317349 A JP 2001317349A JP 2002335125 A JP2002335125 A JP 2002335125A
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- inductor
- controlled oscillator
- circuit
- resonance circuit
- voltage controlled
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電圧制御発振器及
びそれを用いた通信機に関し、例えば、発振周波数の変
動を抑制できる電圧制御発振器及びそれを用いた通信機
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage-controlled oscillator and a communication device using the same, for example, a voltage-controlled oscillator capable of suppressing fluctuations in oscillation frequency and a communication device using the same.
【０００２】[0002]
【従来の技術】電圧制御発振器は、通信機などにおいて
局部発振源である周波数シンセサイザの源振用発振器と
して一般に用いられる。2. Description of the Related Art A voltage controlled oscillator is generally used as a source oscillation oscillator of a frequency synthesizer which is a local oscillation source in a communication device or the like.
【０００３】図６は、従来の電圧制御発振器を示す回路
図である。電圧制御発振器５０は、共振回路１、増幅回
路２を備え、共振回路１と増幅回路２とは結合コンデン
サＣ０で接続される。共振回路１は、可変容量ダイオー
ドＶＤ１、インダクタＬ１，Ｌ２、コンデンサＣ１を備
え、可変容量ダイオードＶＤ１及びインダクタＬ１から
なるＬＣ直列共振回路で決定される周波数で共振された
信号を出力する回路である。可変容量ダイオードＶＤ１
のアノードは接地され、カソードはインダクタＬ１１に
接続されるとともに、インダクタＬ２を介して制御端子
３に接続される。また、インダクタＬ２の制御端子３側
はコンデンサＣ１を介して接地される。FIG. 6 is a circuit diagram showing a conventional voltage controlled oscillator. The voltage controlled oscillator 50 includes a resonance circuit 1 and an amplification circuit 2, and the resonance circuit 1 and the amplification circuit 2 are connected by a coupling capacitor C0. The resonance circuit 1 includes a variable capacitance diode VD1, inductors L1 and L2, and a capacitor C1, and is a circuit that outputs a signal resonated at a frequency determined by an LC series resonance circuit including the variable capacitance diode VD1 and the inductor L1. Variable capacitance diode VD1
Is grounded, the cathode is connected to the inductor L11, and is connected to the control terminal 3 via the inductor L2. The control terminal 3 side of the inductor L2 is grounded via the capacitor C1.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記従来の
電圧制御発振器によれば、可変容量ダイオードに増幅回
路の発振トランジスタからの低周波雑音電圧が印加され
ると可変容量ダイオードの容量値が変動し、発振周波数
が変動する。この発振周波数の変動により電圧制御発振
器の位相雑音が劣化するといった問題があった。However, according to the conventional voltage controlled oscillator, when a low frequency noise voltage from the oscillation transistor of the amplifier circuit is applied to the variable capacitance diode, the capacitance of the variable capacitance diode fluctuates. , The oscillation frequency fluctuates. There was a problem that the phase noise of the voltage controlled oscillator deteriorated due to the fluctuation of the oscillation frequency.
【０００５】本発明は、このような問題点を解決するた
めになされたものであり、発振周波数の変動を抑制し、
位相雑音を改善することが可能な電圧制御発振器及びそ
れを用いた通信機を提供することを目的とする。The present invention has been made in order to solve such a problem, and suppresses fluctuation of the oscillation frequency.
An object of the present invention is to provide a voltage-controlled oscillator capable of improving phase noise and a communication device using the same.
【０００６】[0006]
【課題を解決するための手段】上述する問題点を解決す
るため本発明の電圧制御発振器は、増幅回路と、該増幅
回路に接続される共振回路とを含み、該共振回路が、可
変容量ダイオード及び第１のインダクタからなるＬＣ直
列共振回路と、該ＬＣ直列共振回路に並列接続されると
ともに、発振周波数近傍の領域でインピーダンスが高く
なり、低周波領域でインピーダンスが低くなるインピー
ダンス素子とを有することを特徴とする。In order to solve the above-mentioned problems, a voltage controlled oscillator according to the present invention includes an amplifier circuit and a resonance circuit connected to the amplifier circuit, wherein the resonance circuit includes a variable capacitance diode. And an LC series resonance circuit comprising a first inductor, and an impedance element connected in parallel to the LC series resonance circuit and having an impedance that is high in a region near an oscillation frequency and low in a low frequency region. It is characterized by.
【０００７】また、本発明の電圧制御発振回路は、前記
インピーダンス素子が、第２のインダクタであることを
特徴とする。Further, in the voltage controlled oscillation circuit according to the present invention, the impedance element is a second inductor.
【０００８】あるいは、本発明の電圧制御発振回路は、
前記インピーダンス素子が、第２のインダクタと該第２
のインダクタに直列に接続された抵抗であることを特徴
とする。[0008] Alternatively, the voltage controlled oscillation circuit of the present invention comprises:
The impedance element includes a second inductor and the second inductor.
And a resistor connected in series with the inductor.
【０００９】本発明の通信機は、上述の電圧制御発振器
を用いたことを特徴とする。A communication device according to the present invention is characterized by using the above-described voltage controlled oscillator.
【００１０】本発明の電圧制御発振器によれば、可変容
量ダイオード及び第１のインダクタからなるＬＣ直列共
振回路に、発振周波数近傍でインピーダンスが高くな
り、低周波領域でインピーダンスが低くなるインピーダ
ンス素子を並列接続しているため、共振回路と結合コン
デンサとの接続点から共振回路を見たときのインピーダ
ンスは、低周波領域において十分に低くできる。According to the voltage controlled oscillator of the present invention, an impedance element whose impedance is high near the oscillation frequency and whose impedance is low in the low frequency region is connected in parallel to the LC series resonance circuit including the variable capacitance diode and the first inductor. Because of the connection, the impedance when the resonance circuit is viewed from the connection point between the resonance circuit and the coupling capacitor can be sufficiently reduced in a low frequency region.
【００１１】本発明の通信機によれば、位相雑音を改善
することが可能な電圧制御発振器を用いているため、良
好な通信特性を有する通信機を構成することができる。According to the communication device of the present invention, a voltage controlled oscillator capable of improving phase noise is used, so that a communication device having good communication characteristics can be configured.
【００１２】[0012]
【発明の実施の形態】以下、図面を参照して本発明の実
施例を説明する。なお、実施例中において、従来例と同
一もしくは同等の部分には同一番号を付し、詳細な説明
は省略する。Embodiments of the present invention will be described below with reference to the drawings. In the embodiments, the same or equivalent parts as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.
【００１３】図１は、本発明の電圧制御発振器に係る第
１の実施例の回路図である。電圧制御発振器１０は、共
振回路１１、増幅回路２を備え、共振回路１と増幅回路
２とは結合コンデンサＣ０で接続される。FIG. 1 is a circuit diagram of a first embodiment of the voltage controlled oscillator according to the present invention. The voltage controlled oscillator 10 includes a resonance circuit 11 and an amplification circuit 2, and the resonance circuit 1 and the amplification circuit 2 are connected by a coupling capacitor C0.
【００１４】共振回路１１は、可変容量ダイオードＶＤ
１１、インダクタＬ１１〜Ｌ１３、コンデンサＣ１１，
Ｃ１２を備え、可変容量ダイオードＶＤ１１及び第１の
インダクタであるインダクタＬ１１からなるＬＣ直列共
振回路１２で決定される周波数で共振された信号を出力
する回路である。The resonance circuit 11 has a variable capacitance diode VD
11, inductors L11 to L13, capacitor C11,
C12 is a circuit that outputs a signal resonated at a frequency determined by the LC series resonance circuit 12 including the variable capacitance diode VD11 and the inductor L11 as the first inductor.
【００１５】可変容量ダイオードＶＤ１１のアノードは
接地され、カソードはインダクタＬ１１に接続されると
ともに、インダクタＬ１２を介して制御端子１３に接続
される。また、インダクタＬ１２の制御端子１３側はコ
ンデンサＣ１１を介して接地される。The anode of the variable capacitance diode VD11 is grounded, the cathode is connected to the inductor L11, and is connected to the control terminal 13 via the inductor L12. The control terminal 13 side of the inductor L12 is grounded via the capacitor C11.
【００１６】さらに、インダクタＬ１１の増幅回路２側
は、コンデンサＣ１２を介して、発振周波数近傍の領域
でインピーダンスが高くなり、１０ＭＨｚ以下の低周波
領域でインピーダンスが低くなるインピーダンス素子で
あり、第２のインダクタでもあるインダクタＬ１３を介
して接地される。Further, the impedance circuit 2 side of the inductor L11 is an impedance element via the capacitor C12, the impedance of which increases in the region near the oscillation frequency and decreases in the low frequency region of 10 MHz or less. It is grounded via an inductor L13 which is also an inductor.
【００１７】図２は、本発明の電圧制御発振器に係る第
２の実施例の回路図である。電圧制御発振器２０は、第
１の実施例の電圧制御発振器１０（図１）と比較して、
共振回路２１のＬＣ直列共振回路２２が可変容量ダイオ
ードＶＤ１１，ＶＤ２１、第１のインダクタであるイン
ダクタＬ１１で構成される点で異なる。FIG. 2 is a circuit diagram of a second embodiment according to the voltage controlled oscillator of the present invention. The voltage controlled oscillator 20 is different from the voltage controlled oscillator 10 (FIG. 1) of the first embodiment in that
The difference is that the LC series resonance circuit 22 of the resonance circuit 21 includes variable capacitance diodes VD11 and VD21 and an inductor L11 which is a first inductor.
【００１８】上述の第１及び第２の実施例の電圧制御発
振器によれば、可変容量ダイオード及び第１のインダク
タからなるＬＣ直列共振回路に、発振周波数近傍の領域
でインピーダンスが高くなり、低周波領域でインピーダ
ンスが低くなるインピーダンス素子を並列接続している
ため、共振回路と結合コンデンサとの接続点（図中、点
Ａ）から共振回路を見たときのインピーダンスは、低周
波領域において十分に低くできる。According to the voltage controlled oscillators of the first and second embodiments, the impedance increases in the region near the oscillation frequency in the LC series resonance circuit including the variable capacitance diode and the first inductor. Since the impedance elements having low impedance in the region are connected in parallel, the impedance when the resonance circuit is viewed from the connection point (point A in the figure) between the resonance circuit and the coupling capacitor is sufficiently low in the low frequency region. it can.
【００１９】したがって、増幅回路の発振トランジスタ
から可変容量ダイオードに印加される低周波雑音電圧を
小さくでき、発振周波数の変動を抑制できるため、可変
容量ダイオードの容量値変動が小さくなり、その結果、
電圧制御発振器の位相雑音を改善できる。Accordingly, the low-frequency noise voltage applied from the oscillation transistor of the amplifier circuit to the variable capacitance diode can be reduced, and the fluctuation of the oscillation frequency can be suppressed, so that the capacitance value fluctuation of the variable capacitance diode is reduced.
The phase noise of the voltage controlled oscillator can be improved.
【００２０】特に、第２の実施例の電圧制御発振器のよ
うに可変容量ダイオードが２つある場合には、どちらの
可変容量ダイオードの容量値変動も小さくできるため、
電圧制御発振器の位相雑音を改善できる効果は、可変容
量ダイオードが１つの場合に比べて大きい。In particular, when there are two variable capacitance diodes as in the voltage controlled oscillator of the second embodiment, the fluctuation of the capacitance value of either variable capacitance diode can be reduced.
The effect of improving the phase noise of the voltage controlled oscillator is greater than that of the case where the number of variable capacitance diodes is one.
【００２１】図３は、本発明の電圧制御発振器に係る第
３の実施例の回路図である。電圧制御発振器１５は、第
１の実施例の電圧制御発振器１０（図１）と比較して、
共振回路１６のインダクタＬ１３に抵抗Ｒ１が直列に接
続されている点で異なる。FIG. 3 is a circuit diagram of a third embodiment according to the voltage controlled oscillator of the present invention. The voltage controlled oscillator 15 is different from the voltage controlled oscillator 10 (FIG. 1) of the first embodiment in that
The difference is that the resistor R1 is connected in series to the inductor L13 of the resonance circuit 16.
【００２２】また、図４は、本発明の電圧制御発振器に
係る第４の実施例の回路図である。電圧制御発振器２５
は、第２の実施例の電圧制御発振器２０（図２）と比較
して、共振回路２６のインダクタＬ１３に抵抗Ｒ１が直
列に接続されている点で異なる。FIG. 4 is a circuit diagram of a voltage-controlled oscillator according to a fourth embodiment of the present invention. Voltage controlled oscillator 25
Is different from the voltage controlled oscillator 20 (FIG. 2) of the second embodiment in that a resistor R1 is connected in series to an inductor L13 of the resonance circuit 26.
【００２３】上述の第３及び第４の実施例の電圧制御発
振器によれば、可変容量ダイオード及び第１のインダク
タからなるＬＣ直列共振回路に、第２のインダクタを並
列接続することによって生じる不必要な共振点によって
異常発振が発生するのを防止することができる。According to the above-described voltage controlled oscillators of the third and fourth embodiments, unnecessary components caused by connecting the second inductor in parallel to the LC series resonance circuit including the variable capacitance diode and the first inductor are unnecessary. It is possible to prevent abnormal oscillation from occurring due to a resonance point.
【００２４】すなわち、第１及び第２の実施例のよう
に、ＬＣ直列共振回路に第２のインダクタを並列接続す
ると、たとえば電圧制御発振器１０の場合には、インダ
クタＬ１１と可変容量ダイオードＤ１１からなる直列共
振回路１２だけでなく、それにインダクタＬ１３とコン
デンサＣ１２が加わった並列共振回路が構成される。そ
して、増幅回路２中のトランジスタやコンデンサのバラ
ツキによって、直列共振回路１２の共振周波数だけでな
く、この並列共振回路の共振周波数でも発振条件を満た
してしまい、異常発振を起こしてしまう可能性がある。
これは電圧制御発振器２０の場合も同じである。That is, when the second inductor is connected in parallel to the LC series resonance circuit as in the first and second embodiments, for example, in the case of the voltage-controlled oscillator 10, the inductor comprises the inductor L11 and the variable capacitance diode D11. Not only the series resonance circuit 12, but also a parallel resonance circuit in which an inductor L13 and a capacitor C12 are added thereto is configured. Due to variations in transistors and capacitors in the amplifier circuit 2, not only the resonance frequency of the series resonance circuit 12 but also the resonance frequency of this parallel resonance circuit satisfies the oscillation condition, which may cause abnormal oscillation. .
This is the same for the voltage controlled oscillator 20.
【００２５】これに対して、第３及び第４の実施例のよ
うに、第２のインダクタに直列に抵抗を設けると、直列
共振回路１２の損失は変化しないにもかかわらず、並列
共振回路の損失が増加し、増幅回路２中のトランジスタ
やコンデンサにバラツキがあっても、この並列共振回路
の共振周波数で発振条件を満たさなくなる。これによっ
て、第２のインダクタを並列接続することによる異常発
振の発生を防止することができる。On the other hand, if a resistor is provided in series with the second inductor as in the third and fourth embodiments, the loss of the series resonance circuit 12 does not change, but the parallel resonance circuit does not change. Even if the loss increases and the transistors and capacitors in the amplifier circuit 2 vary, the oscillation condition cannot be satisfied at the resonance frequency of the parallel resonance circuit. This can prevent occurrence of abnormal oscillation due to connecting the second inductors in parallel.
【００２６】図５は、本発明の通信機に係る一実施例の
ブロック図である。通信機３０は、アンテナ３１、デュ
プレクサ３２、増幅部３３ａ，３３ｂ、混合部３４ａ，
３４ｂ、電圧制御発振器３５、ＰＬＬ制御用回路３６、
ローパスフィルタ３７、温度補償水晶発振回路３８、送
信部Ｔｘ、受信部Ｒｘを備える。FIG. 5 is a block diagram of an embodiment according to the communication device of the present invention. The communication device 30 includes an antenna 31, a duplexer 32, amplification units 33a and 33b, a mixing unit 34a,
34b, a voltage control oscillator 35, a PLL control circuit 36,
It includes a low-pass filter 37, a temperature-compensated crystal oscillation circuit 38, a transmitting unit Tx, and a receiving unit Rx.
【００２７】ＰＬＬ制御用回路３６は、電圧制御発振器
３５の出力信号を入力し、温度補償水晶発振回路３８の
発振信号と位相を比較し、所定の周波数及び位相となる
ように制御電圧を出力する。The PLL control circuit 36 receives the output signal of the voltage controlled oscillator 35, compares the phase with the oscillation signal of the temperature compensated crystal oscillation circuit 38, and outputs a control voltage so as to have a predetermined frequency and phase. .
【００２８】電圧制御発振器３５は、ローパスフィルタ
３７を介してその制御電圧を制御端子で受けて、その制
御電圧に応じた高周波信号を出力する。この高周波信号
は、混合部３４ａ，３４ｂにそれぞれ局部発振信号とし
て与えられる。The voltage-controlled oscillator 35 receives the control voltage via a low-pass filter 37 at a control terminal, and outputs a high-frequency signal corresponding to the control voltage. This high-frequency signal is provided to the mixing units 34a and 34b as local oscillation signals.
【００２９】混合部３４ａは、送信部Ｔｘから出力され
る中間周波信号と局部発振信号とを混合して送信信号に
変換する。この送信信号は、増幅部３３ａで増幅され、
デュプレクサ３２を介してアンテナ３１から放射され
る。The mixing section 34a mixes the intermediate frequency signal output from the transmission section Tx with the local oscillation signal and converts the mixed signal into a transmission signal. This transmission signal is amplified by the amplifier 33a,
Radiated from the antenna 31 via the duplexer 32.
【００３０】アンテナ３１からの受信信号はデュプレク
サ３２を介して増幅部３３ｂで増幅される。混合部３４
ｂは、増幅部３３ｂで増幅された受信信号と電圧制御発
振器３５からの局部発振信号とを混合して中間周波信号
に変換する。この中間周波信号は、受信部Ｒｘで信号処
理される。The signal received from the antenna 31 is amplified by the amplifier 33b via the duplexer 32. Mixing section 34
b mixes the received signal amplified by the amplifier 33b with the local oscillation signal from the voltage controlled oscillator 35 and converts it into an intermediate frequency signal. This intermediate frequency signal is subjected to signal processing in the receiving unit Rx.
【００３１】このような通信機３０における電圧制御発
振器３５に、図１ないし図４で示した実施例の電圧制御
発振器１０，１５，２０，２５を用いる。As the voltage controlled oscillator 35 in such a communication device 30, the voltage controlled oscillators 10, 15, 20, 25 of the embodiment shown in FIGS. 1 to 4 are used.
【００３２】上述した実施例の通信機によれば、位相雑
音を改善することが可能な電圧制御発振器を用いている
ため、良好な通信特性を有する通信機を構成することが
できる。According to the communication device of the above-described embodiment, since the voltage controlled oscillator capable of improving the phase noise is used, a communication device having good communication characteristics can be configured.
【００３３】なお、上述の実施例の電圧制御発振器で説
明した共振回路の構成は一般的な回路構成であり、他の
構成の回路であっても本発明の電圧制御発振器を実現す
ることは可能である。The configuration of the resonance circuit described in the voltage controlled oscillator of the above-described embodiment is a general circuit configuration, and it is possible to realize the voltage controlled oscillator of the present invention even with a circuit having another configuration. It is.
【００３４】[0034]
【発明の効果】本発明の電圧制御発振器によれば、可変
容量ダイオード及び第１のインダクタからなるＬＣ直列
共振回路に、発振周波数近傍の領域でインピーダンスが
高くなり、低周波領域でインピーダンスが低くなるイン
ピーダンス素子を並列接続しているため、共振回路と結
合コンデンサとの接続点から共振回路を見たときのイン
ピーダンスは、低周波領域において十分に低くできる。According to the voltage controlled oscillator of the present invention, the impedance increases in the region near the oscillation frequency and decreases in the low frequency region in the LC series resonance circuit including the variable capacitance diode and the first inductor. Since the impedance elements are connected in parallel, the impedance when the resonance circuit is viewed from the connection point between the resonance circuit and the coupling capacitor can be sufficiently reduced in a low frequency region.
【００３５】したがって、増幅回路の発振トランジスタ
から可変容量ダイオードに印加される低周波雑音電圧を
小さくでき、発振周波数の変動を抑制できるため、可変
容量ダイオードの容量値変動が小さくなり、その結果、
電圧制御発振器の位相雑音を改善できる。Therefore, the low-frequency noise voltage applied from the oscillation transistor of the amplifier circuit to the variable capacitance diode can be reduced, and the fluctuation of the oscillation frequency can be suppressed, so that the capacitance value fluctuation of the variable capacitance diode is reduced.
The phase noise of the voltage controlled oscillator can be improved.
【００３６】本発明の通信機によれば、位相雑音を改善
することが可能な電圧制御発振器を用いているため、良
好な通信特性を有する通信機を構成することができる。According to the communication device of the present invention, since the voltage controlled oscillator capable of improving the phase noise is used, a communication device having good communication characteristics can be configured.
【図１】本発明の電圧制御発振器に係る第１の実施例の
回路図である。FIG. 1 is a circuit diagram of a first embodiment according to a voltage controlled oscillator of the present invention.
【図２】本発明の電圧制御発振器に係る第２の実施例の
回路図である。FIG. 2 is a circuit diagram of a second embodiment according to the voltage controlled oscillator of the present invention.
【図３】本発明の電圧制御発振器に係る第３の実施例の
回路図である。FIG. 3 is a circuit diagram of a third embodiment according to the voltage controlled oscillator of the present invention.
【図４】本発明の電圧制御発振器に係る第４の実施例の
回路図である。FIG. 4 is a circuit diagram of a fourth embodiment according to the voltage controlled oscillator of the present invention.
【図５】本発明の通信機に係る一実施例のブロック図で
ある。FIG. 5 is a block diagram of an embodiment according to the communication device of the present invention.
【図６】従来の電圧制御発振器の回路図である。FIG. 6 is a circuit diagram of a conventional voltage controlled oscillator.
２ 増幅回路 １０，２０ 電圧制御発振器 １１，２１ 共振回路 １２，２２ ＬＣ直列共振回路 ３０ 通信機 Ｌ１ インダクタ（第１のインダクタ） Ｌ３ インダクタ（インピーダンス素子、第２のイ
ンダクタ） ＶＤ１１，ＶＤ２１ 可変容量ダイオード Ｒ１ 抵抗2 Amplification circuit 10, 20 Voltage controlled oscillator 11, 21, Resonance circuit 12, 22, LC series resonance circuit 30 Communication device L1 Inductor (first inductor) L3 Inductor (impedance element, second inductor) VD11, VD21 Variable capacitance diode R1 resistance
Claims (4)
振回路とを含み、該共振回路が、可変容量ダイオード及
び第１のインダクタからなるＬＣ直列共振回路と、該Ｌ
Ｃ直列共振回路に並列接続されるとともに、発振周波数
近傍の領域でインピーダンスが高くなり、低周波領域で
インピーダンスが低くなるインピーダンス素子とを有す
ることを特徴とする電圧制御発振回路。1. An amplifier comprising: an amplifier circuit; and a resonance circuit connected to the amplifier circuit, wherein the resonance circuit includes an LC series resonance circuit including a variable capacitance diode and a first inductor;
A voltage controlled oscillation circuit comprising: an impedance element connected in parallel to a C series resonance circuit, having an impedance that increases in a region near an oscillation frequency and decreases in a low frequency region.
ダクタであることを特徴とする請求項１に記載の電圧制
御発振器。2. The voltage controlled oscillator according to claim 1, wherein said impedance element is a second inductor.
ダクタと該第２のインダクタに直列に接続された抵抗で
あることを特徴とする請求項１に記載の電圧制御発振
器。3. The voltage controlled oscillator according to claim 1, wherein the impedance element is a second inductor and a resistor connected in series to the second inductor.
載の電圧制御発振器を用いたことを特徴とする通信機。4. A communication device using the voltage-controlled oscillator according to claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001317349A JP3893932B2 (en) | 2001-03-08 | 2001-10-15 | Voltage controlled oscillator |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001065285 | 2001-03-08 | ||
| JP2001-65285 | 2001-03-08 | ||
| JP2001317349A JP3893932B2 (en) | 2001-03-08 | 2001-10-15 | Voltage controlled oscillator |
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| Publication Number | Publication Date |
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| JP3893932B2 JP3893932B2 (en) | 2007-03-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006134750A1 (en) * | 2005-06-13 | 2006-12-21 | Kabushiki Kaisha Kobe Seiko Sho | Oscillator |
| CN110096167A (en) * | 2019-05-10 | 2019-08-06 | 鲁伯特（北京）教育科技有限公司 | A kind of LC resonance circuit of time writer and the method for proposing high q-factor |
| CN115133939A (en) * | 2021-03-24 | 2022-09-30 | 海能达通信股份有限公司 | Transmitter and communication device |
-
2001
- 2001-10-15 JP JP2001317349A patent/JP3893932B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006134750A1 (en) * | 2005-06-13 | 2006-12-21 | Kabushiki Kaisha Kobe Seiko Sho | Oscillator |
| CN110096167A (en) * | 2019-05-10 | 2019-08-06 | 鲁伯特（北京）教育科技有限公司 | A kind of LC resonance circuit of time writer and the method for proposing high q-factor |
| CN115133939A (en) * | 2021-03-24 | 2022-09-30 | 海能达通信股份有限公司 | Transmitter and communication device |
| CN115133939B (en) * | 2021-03-24 | 2023-12-12 | 海能达通信股份有限公司 | Transmitter and communication device |
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| Publication number | Publication date |
|---|---|
| JP3893932B2 (en) | 2007-03-14 |
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