JPH04119116U - Broadband oscillator - Google Patents
Broadband oscillatorInfo
- Publication number
- JPH04119116U JPH04119116U JP3170891U JP3170891U JPH04119116U JP H04119116 U JPH04119116 U JP H04119116U JP 3170891 U JP3170891 U JP 3170891U JP 3170891 U JP3170891 U JP 3170891U JP H04119116 U JPH04119116 U JP H04119116U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- output
- vco
- mixing circuit
- oscillation
- 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.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 claims abstract description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
(57)【要約】
【目的】 広帯域にわたり連続的に周波数を変化させる
ことができる広帯域発振装置の開発を目的とする。
【構成】 出力すべき周波数より十分に高い周波数帯域
で可変周波数発振を行い、この発振周波数を周波数混合
回路に入力して出力周波数を生成することを特徴として
いる。
(57) [Summary] [Purpose] The purpose is to develop a wideband oscillator that can continuously change the frequency over a wide band. [Structure] The present invention is characterized in that variable frequency oscillation is performed in a frequency band sufficiently higher than the frequency to be output, and this oscillation frequency is input to a frequency mixing circuit to generate an output frequency.
Description
【０００１】0001
本考案は広い周波数範囲にわたり、連続的に周波数を変化させることができる 広帯域発振装置に関するものである。 This device can continuously change the frequency over a wide frequency range. This invention relates to a wideband oscillator.
【０００２】0002
図２は従来のこの種の装置を示す接続図で、図において、１１は可変容量ダイ オード、１２，１３，１４，１５，１６，１７はそれぞれキャパシタ、１８，１ ９，２０，２１はそれぞれコイル、２２，２３，２４，２５はそれぞれＮＰＮ型 トランジスタ、２６，２７，２８，２９はそれぞれ抵抗、３０は切換スイッチを 示す。 Figure 2 is a connection diagram showing a conventional device of this type. In the figure, 11 is a variable capacitance diode. odes, 12, 13, 14, 15, 16, 17 are capacitors, 18, 1, respectively. 9, 20, 21 are each a coil, 22, 23, 24, 25 are each an NPN type. Transistors, 26, 27, 28, 29 are resistors, and 30 is a changeover switch. show.
【０００３】 スイッチ３０の切り換えによってコイル１８，１９，２０の内、どれかのコイ ルを選択して可変容量ダイオード１１と共に発振回路を構成し、外部からの制御 電圧により可変容量ダイオード１１の容量を変化させて発振周波数を変化させ、 この出力をトランジスタ２５によってエミッタホロワ増幅して出力する。 然し、同一のコイルに対して可変容量ダイオードで変化させることができる周 波数範囲は、±１０％程度に過ぎないため、互いに自己誘導係数の異なる複数の コイルをスイッチ３０で切り換えて広帯域の発振装置を構成している。0003 By switching the switch 30, any one of the coils 18, 19, and 20 Select the oscillation circuit with the variable capacitance diode 11, and control it from the outside. The oscillation frequency is changed by changing the capacitance of the variable capacitance diode 11 depending on the voltage, This output is emitter follower amplified by the transistor 25 and output. However, the frequency that can be changed with a variable capacitance diode for the same coil is Since the wave number range is only about ±10%, multiple waves with different self-induction coefficients A broadband oscillation device is constructed by switching the coils using a switch 30.
【０００４】0004
解決しようとする問題点は、従来の装置は以上のように構成されているので、 多くの部品を必要とし、且つスイッチ３０の切り換えに際して出力周波数が不連 続に変化するという点にある。 本考案はかかる課題を解決するためになされたもので、広帯域にわたって出力 周波数を連続的に変化させることができる広帯域発振装置を得ることを目的とし ている。 The problem we are trying to solve is that the conventional equipment is configured as described above. It requires many parts and the output frequency is discontinuous when switching the switch 30. The point is that it changes continuously. This invention was devised to solve this problem, and outputs over a wide band. The aim is to obtain a wideband oscillator that can change the frequency continuously. ing.
【０００５】[0005]
本考案にかかる広帯域発振装置は、出力すべき周波数より十分に高い周波数帯 域内で可変周波数発振を行い、周波数混合回路により出力すべき周波数を生成す ることを特徴としている。 The broadband oscillator according to the present invention has a frequency band sufficiently higher than the frequency to be output. Variable frequency oscillation is performed within the range, and the frequency to be output is generated by the frequency mixing circuit. It is characterized by
【０００６】[0006]
図１は本考案の一実施例を示すブロック図であって、図において、１はＶＣＯ （電圧制御発振回路）、２は周波数混合回路、３はバンドパスフィルタ（以下、 ＢＰＦと略記する）である。 たとえば、ＶＣＯ１の発振周波数ｆ1 を制御電圧の制御によって７６０ＭＨｚ 〜８４０ＭＨｚの範囲に変化させることは容易であり、混合回路２の他方の入力 周波数ｆ2 を７００ＭＨｚに保てば、出力周波数ｆ0 ＝ｆ1 −ｆ2 を６０ＭＨｚ 〜１４０ＭＨｚの間で連続的にかつ円滑に変化させることができる。 ＢＰＦ３としては、たとえばＳＡＷフィルタ（弾性表面波フィルタ）などを用 い、広帯域フィルタを小形で安価に構成することができる。FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, 1 is a VCO (voltage controlled oscillation circuit), 2 is a frequency mixing circuit, and 3 is a band pass filter (hereinafter abbreviated as BPF). be. For example, it is easy to change the oscillation frequency f 1 of the VCO 1 in the range of 760 MHz to 840 MHz by controlling the control voltage, and if the other input frequency f 2 of the mixing circuit 2 is maintained at 700 MHz, the output frequency f 0 = f 1 -f 2 can be continuously and smoothly changed between 60 MHz and 140 MHz. As the BPF 3, for example, a SAW filter (surface acoustic wave filter) or the like can be used, and a wideband filter can be constructed in a small size and at low cost.
【０００７】[0007]
以上説明したように本考案の広帯域発振装置は、広帯域にわたって出力周波数 を連続的に変化させることができる利点がある。 As explained above, the wideband oscillator of the present invention has an output frequency over a wideband. It has the advantage of being able to change continuously.
【図１】本考案の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
【図２】従来の装置を示す接続図である。FIG. 2 is a connection diagram showing a conventional device.
１ ＶＣＯ ２ 周波数混合回路 ３ ＢＰＦ 1 VCO 2 Frequency mixing circuit 3 BPF
Claims (1)
帯域内で外部からの制御電圧に対応して変化する周波数
を発振するＶＣＯ（電圧制御発振回路）、このＶＣＯの
出力周波数を上記出力すべき周波数に変換する周波数混
合回路、この周波数混合回路の出力に含まれている周波
数成分のうち、上記出力すべき周波数以外の周波数成分
を減衰させ、上記ＶＣＯの出力周波数を変化させて上記
出力すべき周波数を変化する場合、上記出力すべき周波
数の所定の変化範囲において上記出力すべき周波数を通
過させるバンドパスフィルタを備えた広帯域発振装置。Claim 1: A VCO (voltage controlled oscillator circuit) that oscillates a frequency that changes in response to an external control voltage within a frequency band sufficiently higher than the frequency to be output, the output frequency of this VCO to be output as described above. A frequency mixing circuit that converts the frequency into a frequency, attenuating frequency components other than the frequency to be outputted from among the frequency components included in the output of this frequency mixing circuit, and changing the output frequency of the VCO to change the frequency to be outputted. When changing the frequency, a wideband oscillation device includes a bandpass filter that passes the frequency to be output within a predetermined change range of the frequency to be output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3170891U JPH04119116U (en) | 1991-04-10 | 1991-04-10 | Broadband oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3170891U JPH04119116U (en) | 1991-04-10 | 1991-04-10 | Broadband oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04119116U true JPH04119116U (en) | 1992-10-26 |
Family
ID=31914906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3170891U Pending JPH04119116U (en) | 1991-04-10 | 1991-04-10 | Broadband oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04119116U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007102300A1 (en) * | 2006-03-07 | 2007-09-13 | Nec Corporation | Frequency synthesizer |
-
1991
- 1991-04-10 JP JP3170891U patent/JPH04119116U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007102300A1 (en) * | 2006-03-07 | 2007-09-13 | Nec Corporation | Frequency synthesizer |
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