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JP3653430B2 - 2-band oscillator - Google Patents
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JP3653430B2 - 2-band oscillator - Google Patents

2-band oscillator Download PDF

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Publication number
JP3653430B2
JP3653430B2 JP35775299A JP35775299A JP3653430B2 JP 3653430 B2 JP3653430 B2 JP 3653430B2 JP 35775299 A JP35775299 A JP 35775299A JP 35775299 A JP35775299 A JP 35775299A JP 3653430 B2 JP3653430 B2 JP 3653430B2
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Japan
Prior art keywords
frequency
circuit
band
oscillation signal
inductor
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JP35775299A
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Japanese (ja)
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JP2001177341A (en
Inventor
康博 五十嵐
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Priority to JP35775299A priority Critical patent/JP3653430B2/en
Priority to KR1020000076944A priority patent/KR20010062471A/en
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B25/00—Simultaneous generation by a free-running oscillator of oscillations having different frequencies
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1203—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier being a single transistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1841—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator
    • H03B5/1847—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator the active element in the amplifier being a semiconductor device
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/02—Varying the frequency of the oscillations by electronic means
    • H03B2201/025—Varying the frequency of the oscillations by electronic means the means being an electronic switch for switching in or out oscillator elements
    • H03B2201/0266—Varying the frequency of the oscillations by electronic means the means being an electronic switch for switching in or out oscillator elements the means comprising a transistor

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

Description

【０００１】
【発明の属する技術分野】
本発明は、二つの周波数バンドで発振する発振信号を増幅して出力する２バンド発振装置に関する。
【０００２】
【従来の技術】
従来の２バンド発振装置を図６によって説明する。発振部２１は二つの発振回路２１ａ、２１ｂを有し、それぞれ異なる周波数バンドで発振するようになっている。例えば、第一の発振回路２１ａは９００ＭＨｚを中心とした８５０ＭＨｚ〜９５０ＭＨｚで発振し、第二の発振回路２１ｂは１．８ＧＨｚを中心として１．７ＧＨｚ〜１．９ＧＨｚで発振する。これら発振回路２１ａ、２１ｂは使用目的によっていずれか一方が発振し、その発振信号はバッファ部２２の増幅回路２２ａで増幅される。
【０００３】
バッファ部２２は二つの出力端子２２ｂ、２２ｃを有し、第一の出力端子２２ｂと増幅回路２２ａの出力端とが第一の抵抗２２ｄによって接続され、第二の出力端子２２ｃと増幅回路２２ａの出力端とが第二の抵抗２２ｅによって接続される。そして、第一の出力端２２ｂには９００ＭＨｚ帯の発振信号を使用する回路（図示せず）が接続され、第二の出力端子２２ｃには１．８ＧＨｚ帯の発振信号を使用する回路（図示せず）が接続されるようになっている。
【０００４】
【発明が解決しようとする課題】
上記の構成では、第一の出力端子と第二の出力端子とは分配用の二つの抵抗によって接続されているので、いずれの出力端子にも同じ発振信号が出力される。そのため、出力レベルが低下すると共に、増幅器が広帯域であるために互いの二次高調波レベルが大きくなるという問題があった。
【０００５】
そこで、本発明の２バンド発振装置においては、出力端子間のアイソレーションを高めて一方の出力端子からは一方の発振信号のみを有効に取りだし、他方の出力端子からは他方の発振信号のみを有効に取り出すことを目的としている。
【０００６】
【課題を解決するための手段】
上記の課題を解決する手段として、本発明の２バンド発振装置では、第一の周波数バンドにおける第一の発振信号又は前記第一のバンドよりも周波数が二倍高い第二の周波数バンドにおける第二の発振信号を出力する発振部と、前記第一の発振信号又は前記第二の発振信号を増幅する増幅トランジスタとを備え、前記増幅トランジスタのコレクタに一端が接続された並列共振回路と、前記並列共振回路の他端と高周波的な接地点との間に接続された第一のインダクタとを設け、前記並列共振回路の他端から前記第一の発振信号を出力すると共に、前記増幅トランジスタのコレクタから前記第二の発振信号を出力し、前記並列共振回路の共振周波数を前記第二の周波数バンドの周波数とほぼ同じになるように設定し、前記並列共振回路と前記第一のインダクタとによる直列共振周波数を前記第二の周波数バンドの二倍の周波数とほぼ同じになるように設定した。
【０００８】
また、本発明の２バンド発振装置は、前記並列共振回路は第二のインダクタと前記第二のインダクタに並列接続されたコンデンサとからなり、前記高周波的な接地点を、前記増幅トランジスタのコレクタに電源電圧を供給するための電圧供給端とした。
【０００９】
【発明の実施の形態】
以下図面に従って本発明の２バンド発振装置を説明する。図１は本発明の２バンド発振装置の構成を示し、図２は本発明の２バンド発振装置における第一の等価回路を示し、図３は図２の伝送特性を示し、図４は本発明の２バンド発振装置における第二の等価回路を示し、図５は図４の伝送特性を示す。
【００１０】
先ず図１において、発振部１は第一の発振回路１ａと第二の発振回路１ｂを有し、それぞれ異なる周波数バンドで発振するようになっている。例えば、第一の発振回路１ａは第一の周波数バンドである８５０ＭＨｚ〜９５０ＭＨｚで発振し、第二の発振回路１ｂはそれよりも周波数が高い第二の周波数バンドである１．７ＧＨｚ〜１．９ＧＨｚで発振する。これら発振回路１ａ、１ｂは使用目的によっていずれか一方が発振し、発振した方の発振信号は切替手段１ｃによってバッファ部２の増幅トランジスタ３のベースに入力される。
【００１１】
なお、発振部１には二つの発振回路を備えることなく、一個の発振回路だけを用いて二つの周波数バンドに切り替えて発振させるようにしてもよい。
【００１２】
増幅トランジスタ３はエミッタ接地型の増幅回路として動作し、そのコレクタには第二のインダクタ４ａとコンデンサ４ｂとからなる並列共振回路４の一端が接続され、その他端には第一のインダクタ５の一端が接続され、さらに、第一のインダクタ５の他端は電圧供給端６に接続される。そして、電圧供給端６に印加された電圧が第一のインダクタ５及び第二のインダクタ４ａを介して増幅トランジスタ３のコレクタに供給される。電圧供給端６は高周波的な接地点であり、直流カットコンデンサ７によってグランドに接地される。また、第一のインダクタ５、第二のインダクタ４ａはプリント基板（図示せず）上に形成したマイクロストリップライン等によって構成されるが、デスクリートのコイルによって構成してもよい。
【００１３】
ここで、並列共振回路４はその共振周波数（Ｆｐ）が第二の周波数バンドのほぼ中心の周波数に一致するように設定されている。また、並列共振回路４と第一のインダクタ５とが直列に接続されていることから、並列共振回路４と第一のインダクタ５とによって等価的な直列共振回路が構成される。そして、その直列共振周波数（Ｆｓ）は並列共振周波数（Ｆｐ）の二倍の周波数（従って、第二の周波数バンドのほぼ中心の周波数の二倍）に一致するように設定されている。
【００１４】
また、バッファ部２は二つの出力端子２ａ、２ｂを有し、第一の出力端子２ａは直流カットコンデンサ８を介して並列共振回路４の他端（即ち、並列共振回路４と第一のインダクタ５との接続点）に接続され、第二の出力端子２ｂは直流カットコンデンサ９を介して増幅トランジスタ３のコレクタに接続される。
【００１５】
以上の構成において、第一の発振回路１ａが動作して第一の周波数バンドにおける第一の発振信号が増幅トランジスタ３のベースに入力されると、増幅された第一の発振信号が第一の出力端子２ａから出力されるが、図１に示す第一の発振回路１ａと増幅トランジスタ３とが信号源と考えられるので、この場合の第一の等価回路は図２のように表される。
【００１６】
図２における信号源１０の内部インピーダンス１０ａは増幅トランジスタ３の出力インピーダンスである。そして、並列共振回路４の共振周波数がＦｐであるから、第一の出力端子２ａにおける伝送特性は図３のように示され、第一の周波数バンドにおける第一の発振信号の周波数（Ｆ１）のレベルは、ほぼ第一のインダクタ５と第二のインダクタ４ａとによる分割比で出力される。また、並列共振回路４の共振周波数Ｆｐでは減衰する特性となる。
従って、並列共振回路４の減衰特性によって第一の周波数バンドの二倍の周波数においても減衰するので、増幅トランジスタ３が発生する第一の発振信号の二次高調波を除去することが出来る。
【００１７】
一方、第二の発振回路１ｂが動作して第二の周波数バンドにおける第二の発振信号が増幅トランジスタ３のベースに入力されると、増幅された第二の発振信号が第二の出力端子２ｂから出力されるが、この場合の第二の等価回路は図４のように表される。また、列共振回路４の共振周波数（Ｆｐ）が第二の周波数バンド内にあり、さらに、並列共振回路４と第一のインダクタ５とによる直列共振周波数（Ｆｓ）が第二の周波数バンドの周波数の二倍となっているので、第二の出力端子２ｂにおける伝送特性は図５のようになる。
【００１８】
従って、第二の発振信号は減衰することなく出力することが出来、また、増幅トランジスタ３が発生する二次高調波を除去することが出来る。
【００１９】
なお、第二の周波数バンドの周波数が第一の周波数バンドの周波数の二倍となっているので、並列共振回路の共振周波数（Ｆｐ）が第一の発振信号の周波数の二倍となり、第一の出力端子２ａから第一の発振信号を出力する際には、第一の発振信号の二次高調波を効果的に除去できる。
【００２０】
【発明の効果】
以上のように、本発明の２バンド発振装置は、第一の周波数バンドにおける第一の発振信号又は前記第一のバンドよりも周波数が二倍高い第二の周波数バンドにおける第二の発振信号を増幅する増幅トランジスタとを備え、増幅トランジスタのコレクタに一端が接続された並列共振回路と、並列共振回路の他端と高周波的な接地点との間に接続された第一のインダクタとを設け、並列共振回路の他端から第一の発振信号を出力すると共に、増幅トランジスタのコレクタから第二の発振信号を出力し、並列共振回路の共振周波数を第二の周波数バンドの周波数とほぼ同じになるように設定し、並列共振回路と第一のインダクタとによる直列共振周波数を第二の周波数バンドの二倍の周波数とほぼ同じになるように設定したたので、第一の出力端子から第一の発振信号を出力するときには並列共振回路によってその二次高調波を除去でき、また、第二の出力端子からは第二の発振信号を減衰することなく出力することが出来る。この際に第二の発振信号の二次高調波は直列共振周波数に一致するので減衰される。また、第一の出力端子と第二の出力端との間には並列共振回路が設けられているので、二つの端子間の結合を粗とすることが出来る。
【００２２】
また、本発明の２バンド発振装置は、並列共振回路を第二のインダクタとコンデンサとで構成し、高周波的な接地点を、増幅トランジスタのコレクタに電源電圧を供給するための電圧供給端としたことで、電圧供給端に印加した電圧を第一のインダクタと第二のインダクタを利用して増幅トランジスタのコレクタに供給できるので、回路構成が簡単になる。
【図面の簡単な説明】
【図１】本発明の２バンド発振装置の構成を示す回路図である。
【図２】本発明の２バンド発振装置における第一の等価回路図である。
【図３】本発明の第一の等価回路における伝送特性図である。
【図４】本発明の２バンド発振装置における第二の等価回路図である。
【図５】本発明の第二の等価回路における伝送特性図である。
【図６】従来の２バンド発振装置の構成を示す回路図である。
【符号の説明】
１ 発振部
１ａ 第一の発振回路
１ｂ 第二の発振回路
１ｃ 切替手段
２ バッファ部
２ａ 第一の出力端子
２ｂ 第二の出力端子
３ 増幅トランジスタ
４ 並列共振回路
４ａ 第二のインダクタ
４ｂ コンデンサ
５ 第一のインダクタ
６ 電圧供給端
７ 直流カットコンデンサ
８、９ コンデンサ
１０ 信号源
１０ａ 内部インピーダンス[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a two-band oscillation device that amplifies and outputs an oscillation signal that oscillates in two frequency bands.
[0002]
[Prior art]
A conventional two-band oscillator will be described with reference to FIG. The oscillating unit 21 has two oscillating circuits 21a and 21b, and oscillates in different frequency bands. For example, the first oscillation circuit 21a oscillates at 850 MHz to 950 MHz centered on 900 MHz, and the second oscillation circuit 21b oscillates at 1.7 GHz to 1.9 GHz centering on 1.8 GHz. One of these oscillation circuits 21 a and 21 b oscillates depending on the purpose of use, and the oscillation signal is amplified by the amplification circuit 22 a of the buffer unit 22.
[0003]
The buffer unit 22 has two output terminals 22b and 22c, the first output terminal 22b and the output terminal of the amplifier circuit 22a are connected by a first resistor 22d, and the second output terminal 22c and the amplifier circuit 22a are connected to each other. The output terminal is connected by the second resistor 22e. A circuit (not shown) using an oscillation signal in the 900 MHz band is connected to the first output terminal 22b, and a circuit (not shown) using an oscillation signal in the 1.8 GHz band is connected to the second output terminal 22c. )) Is connected.
[0004]
[Problems to be solved by the invention]
In the above configuration, since the first output terminal and the second output terminal are connected by the two resistors for distribution, the same oscillation signal is output to any output terminal. For this reason, there are problems that the output level is lowered and the second harmonic level is increased due to the wide bandwidth of the amplifier.
[0005]
Therefore, in the two-band oscillation device of the present invention, the isolation between the output terminals is increased so that only one oscillation signal is effectively extracted from one output terminal, and only the other oscillation signal is effective from the other output terminal. The purpose is to take out.
[0006]
[Means for Solving the Problems]
As a means for solving the above problem, in the two-band oscillation device of the present invention, the first oscillation signal in the first frequency band or the second frequency band in the second frequency band that is twice as high as the first band. A parallel resonance circuit having one end connected to a collector of the amplification transistor, and an oscillation transistor that outputs the oscillation signal of the first oscillation signal and an amplification transistor that amplifies the first oscillation signal or the second oscillation signal. A first inductor connected between the other end of the resonance circuit and a high-frequency grounding point; outputs the first oscillation signal from the other end of the parallel resonance circuit; and a collector of the amplification transistor outputting the second oscillation signal from, it sets the resonant frequency of the parallel resonance circuit to be approximately the same as the frequency of the second frequency band, wherein said parallel resonant circuit first The series resonance frequency by the inductor was set to be approximately the same as twice the frequency of said second frequency band.
[0008]
In the two-band oscillation device of the present invention, the parallel resonant circuit includes a second inductor and a capacitor connected in parallel to the second inductor, and the high-frequency ground point is used as a collector of the amplification transistor. A voltage supply terminal for supplying a power supply voltage was used.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The two-band oscillation device of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a two-band oscillator of the present invention, FIG. 2 shows a first equivalent circuit in the two-band oscillator of the present invention, FIG. 3 shows the transmission characteristics of FIG. 2, and FIG. FIG. 5 shows the transmission characteristic of FIG.
[0010]
First, in FIG. 1, an oscillating unit 1 has a first oscillating circuit 1a and a second oscillating circuit 1b, and oscillates in different frequency bands. For example, the first oscillating circuit 1a oscillates at a first frequency band of 850 MHz to 950 MHz, and the second oscillating circuit 1b is a second frequency band having a higher frequency of 1.7 GHz to 1.9 GHz. It oscillates at. One of these oscillation circuits 1a and 1b oscillates depending on the purpose of use, and the oscillation signal of the oscillation circuit is input to the base of the amplification transistor 3 of the buffer unit 2 by the switching means 1c.
[0011]
The oscillating unit 1 may be oscillated by switching to two frequency bands using only one oscillating circuit without providing two oscillating circuits.
[0012]
The amplifying transistor 3 operates as a grounded emitter type amplifying circuit, one end of a parallel resonant circuit 4 including a second inductor 4a and a capacitor 4b is connected to the collector, and one end of the first inductor 5 is connected to the other end. And the other end of the first inductor 5 is connected to the voltage supply end 6. The voltage applied to the voltage supply terminal 6 is supplied to the collector of the amplification transistor 3 via the first inductor 5 and the second inductor 4a. The voltage supply terminal 6 is a high-frequency grounding point, and is grounded by a DC cut capacitor 7. In addition, the first inductor 5 and the second inductor 4a are configured by a microstrip line or the like formed on a printed board (not shown), but may be configured by a discrete coil.
[0013]
Here, the parallel resonance circuit 4 is set so that its resonance frequency (Fp) coincides with the substantially center frequency of the second frequency band. Further, since the parallel resonant circuit 4 and the first inductor 5 are connected in series, the parallel resonant circuit 4 and the first inductor 5 constitute an equivalent series resonant circuit. The series resonance frequency (Fs) is set to coincide with a frequency twice as high as the parallel resonance frequency (Fp) (and therefore twice as high as the center frequency of the second frequency band).
[0014]
The buffer unit 2 has two output terminals 2a and 2b. The first output terminal 2a is connected to the other end of the parallel resonant circuit 4 via the DC cut capacitor 8 (that is, the parallel resonant circuit 4 and the first inductor). And the second output terminal 2 b is connected to the collector of the amplification transistor 3 via the DC cut capacitor 9.
[0015]
In the above configuration, when the first oscillation circuit 1a operates and the first oscillation signal in the first frequency band is input to the base of the amplification transistor 3, the amplified first oscillation signal is converted into the first oscillation signal. Although output from the output terminal 2a, since the first oscillation circuit 1a and the amplification transistor 3 shown in FIG. 1 are considered as signal sources, the first equivalent circuit in this case is expressed as shown in FIG.
[0016]
An internal impedance 10 a of the signal source 10 in FIG. 2 is an output impedance of the amplification transistor 3. Since the resonant frequency of the parallel resonant circuit 4 is Fp, the transmission characteristic at the first output terminal 2a is shown as in FIG. 3, and the frequency (F1) of the first oscillation signal in the first frequency band is shown. The level is output substantially at a division ratio by the first inductor 5 and the second inductor 4a. Further, the resonance frequency Fp of the parallel resonance circuit 4 has a characteristic that attenuates.
Accordingly, the attenuation characteristic of the parallel resonant circuit 4 attenuates even at a frequency twice that of the first frequency band, so that the second harmonic of the first oscillation signal generated by the amplification transistor 3 can be removed.
[0017]
On the other hand, when the second oscillation circuit 1b operates and the second oscillation signal in the second frequency band is input to the base of the amplification transistor 3, the amplified second oscillation signal is transmitted to the second output terminal 2b. The second equivalent circuit in this case is expressed as shown in FIG. The resonance frequency (Fp) of the column resonance circuit 4 is in the second frequency band, and the series resonance frequency (Fs) of the parallel resonance circuit 4 and the first inductor 5 is the frequency of the second frequency band. Therefore, the transmission characteristic at the second output terminal 2b is as shown in FIG.
[0018]
Therefore, the second oscillation signal can be output without being attenuated, and the second harmonic generated by the amplification transistor 3 can be removed.
[0019]
Since the frequency of the second frequency band is twice the frequency of the first frequency band, the resonance frequency (Fp) of the parallel resonance circuit is twice the frequency of the first oscillation signal , When the first oscillation signal is output from one output terminal 2a, the second harmonic of the first oscillation signal can be effectively removed.
[0020]
【The invention's effect】
As described above, the two-band oscillating device of the present invention generates the first oscillating signal in the first frequency band or the second oscillating signal in the second frequency band whose frequency is twice as high as that of the first band. An amplifying transistor for amplifying, a parallel resonant circuit having one end connected to the collector of the amplifying transistor, and a first inductor connected between the other end of the parallel resonant circuit and a high-frequency ground point; The first oscillation signal is output from the other end of the parallel resonance circuit, and the second oscillation signal is output from the collector of the amplification transistor, so that the resonance frequency of the parallel resonance circuit is substantially the same as the frequency of the second frequency band. set to, since setting the series resonance frequency by the parallel resonance circuit and the first inductor to be approximately the same as twice the frequency of the second frequency band, a first output terminal From when outputting a first oscillation signal can drop the second harmonic by the parallel resonant circuit, also from the second output terminal can be output without attenuation the second oscillation signal. At this time, the second harmonic of the second oscillation signal is attenuated because it matches the series resonance frequency. In addition, since a parallel resonant circuit is provided between the first output terminal and the second output terminal, the coupling between the two terminals can be roughened.
[0022]
In the two-band oscillation device of the present invention, the parallel resonant circuit is configured by the second inductor and the capacitor, and the high-frequency ground point is used as a voltage supply terminal for supplying the power supply voltage to the collector of the amplification transistor. As a result, the voltage applied to the voltage supply terminal can be supplied to the collector of the amplification transistor using the first inductor and the second inductor, so that the circuit configuration is simplified.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing a configuration of a two-band oscillation device of the present invention.
FIG. 2 is a first equivalent circuit diagram in the two-band oscillation device of the present invention.
FIG. 3 is a transmission characteristic diagram in the first equivalent circuit of the present invention.
FIG. 4 is a second equivalent circuit diagram in the two-band oscillation device of the present invention.
FIG. 5 is a transmission characteristic diagram in the second equivalent circuit of the present invention.
FIG. 6 is a circuit diagram showing a configuration of a conventional two-band oscillation device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Oscillator 1a 1st oscillation circuit 1b 2nd oscillation circuit 1c Switching means 2 Buffer part 2a 1st output terminal 2b 2nd output terminal 3 Amplifying transistor 4 Parallel resonance circuit 4a 2nd inductor 4b Capacitor 5 1st Inductor 6 Voltage supply terminal 7 DC cut capacitor 8, 9 Capacitor 10 Signal source 10a Internal impedance

Claims (2)

第一の周波数バンドにおける第一の発振信号又は前記第一のバンドよりも周波数が二倍高い第二の周波数バンドにおける第二の発振信号を出力する発振部と、前記第一の発振信号又は前記第二の発振信号を増幅する増幅トランジスタとを備え、前記増幅トランジスタのコレクタに一端が接続された並列共振回路と、前記並列共振回路の他端と高周波的な接地点との間に接続された第一のインダクタとを設け、前記並列共振回路の他端から前記第一の発振信号を出力すると共に、前記増幅トランジスタのコレクタから前記第二の発振信号を出力し、前記並列共振回路の共振周波数を前記第二の周波数バンドの周波数とほぼ同じになるように設定し、前記並列共振回路と前記第一のインダクタとによる直列共振周波数を前記第二の周波数バンドの二倍の周波数とほぼ同じになるように設定したことを特徴とする２バンド発振装置。An oscillation unit that outputs a first oscillation signal in a first frequency band or a second oscillation signal in a second frequency band having a frequency twice as high as that of the first band; and the first oscillation signal or the An amplifying transistor for amplifying the second oscillation signal, and connected between a parallel resonant circuit having one end connected to the collector of the amplifying transistor, and the other end of the parallel resonant circuit and a high-frequency ground point A first inductor, and outputting the first oscillation signal from the other end of the parallel resonance circuit, and outputting the second oscillation signal from the collector of the amplification transistor, the resonance frequency of the parallel resonance circuit was set to be substantially the same as the frequency of the second frequency band, the series resonance frequency due to the parallel resonance circuit and said first inductor of the second frequency band Times the frequency 2 band oscillating device being characterized in that set to be approximately the same. 前記並列共振回路は第二のインダクタと前記第二のインダクタに並列接続されたコンデンサとからなり、前記高周波的な接地点を、前記増幅トランジスタのコレクタに電源電圧を供給するための電圧供給端としたことを特徴とする請求項１記載の２バンド発振装置。 The parallel resonant circuit includes a second inductor and a capacitor connected in parallel to the second inductor, and the high-frequency ground point is connected to a voltage supply terminal for supplying a power supply voltage to the collector of the amplification transistor. 2 band oscillating device according to claim 1, characterized in that the.
JP35775299A 1999-12-16 1999-12-16 2-band oscillator Expired - Fee Related JP3653430B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP35775299A JP3653430B2 (en) 1999-12-16 1999-12-16 2-band oscillator
KR1020000076944A KR20010062471A (en) 1999-12-16 2000-12-15 2 band oscillation apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35775299A JP3653430B2 (en) 1999-12-16 1999-12-16 2-band oscillator

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JP2001177341A JP2001177341A (en) 2001-06-29
JP3653430B2 true JP3653430B2 (en) 2005-05-25

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KR20010062471A (en) 2001-07-07

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