JPH0344111A - Tracing oscillator - Google Patents
Tracing oscillatorInfo
- Publication number
- JPH0344111A JPH0344111A JP17884889A JP17884889A JPH0344111A JP H0344111 A JPH0344111 A JP H0344111A JP 17884889 A JP17884889 A JP 17884889A JP 17884889 A JP17884889 A JP 17884889A JP H0344111 A JPH0344111 A JP H0344111A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- circuit
- output
- discrimination
- 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
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、高周波入力信号の搬送波周波数に精度良く
合致しながら追随する追尾発振器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a tracking oscillator that follows the carrier frequency of a high-frequency input signal while precisely matching it.
第３図は従来の追尾発振器の構成を示すブロック図であ
り、図において、１は連続波又はパルス変調波等の高周
波信号入力端子、２は電力２分配回路、１１は周波数弁
別回路であり、例えば電力２分配回路２．広帯域同調型
バンドパスフィルタ３ａ及び３ｂ、飽絡線検波器４ａ及
び４ｂ、ビデオ加算回路５で構成する広帯域同調周波数
弁別回路である。６は高周波信号入力のタイミング検出
回路１３により制御され、上記周波数弁別回路１１の弁
別出力信号レベルを増幅又は−時記憶する周波数補正制
御回路、７は上記周波数補正制御回路６の出力信号と、
周波数同調制御回路９により周波数弁別範囲１ｒｂｒ−
１の中心ｆｃに同調する粗同調信号との加算回路、８は
広帯域発振器、１０は高周波信号出力端子である。FIG. 3 is a block diagram showing the configuration of a conventional tracking oscillator. In the figure, 1 is a high frequency signal input terminal such as a continuous wave or a pulse modulated wave, 2 is a power 2 distribution circuit, and 11 is a frequency discrimination circuit. For example, two power distribution circuits 2. This is a wideband tunable frequency discriminator circuit composed of wideband tunable bandpass filters 3a and 3b, saturation line detectors 4a and 4b, and a video addition circuit 5. 6 is a frequency correction control circuit that is controlled by the high frequency signal input timing detection circuit 13 and amplifies or stores the discrimination output signal level of the frequency discrimination circuit 11; 7 is the output signal of the frequency correction control circuit 6;
Frequency discrimination range 1rbr- by frequency tuning control circuit 9
8 is a wideband oscillator, and 10 is a high frequency signal output terminal.
次に動作について説明する。Next, the operation will be explained.
高周波入力端子１に印加した高周波信号は、第４図に示
す高周波弁別特性を持つ広帯域同調周波数弁別回路１１
によって周波数弁別される。The high frequency signal applied to the high frequency input terminal 1 is transmitted to a wideband tuned frequency discrimination circuit 11 having high frequency discrimination characteristics as shown in FIG.
The frequency is discriminated by
周波数弁別回路１１はＹ Ｉ Ｇ （Ｙｉｔｔｌｉｕｍ
ＩｒｏｎＧａｒｎｅｔ）素子利用の１組のバンドパス
フィルタ３ａ、３ｂ等で構成され、１個は中心周波数１
１に同調し、他方は中心周波数ｆｂに同調し、その差ｆ
、−ｆ、をほぼ一定で広帯域に渡って同調できるように
し、各々のフィルタ出力に互いに極性の違った（正負極
性）飽路線検波器４ａ、４ｂを接続し、その出力をビデ
オ加算しているため、高周波信号入力の搬送波周波数に
比例して振幅が正負に変化する弁別出力を得ることがで
きる。The frequency discrimination circuit 11 is a Y I G (Yittlium
It consists of a set of bandpass filters 3a, 3b, etc. that utilize IronGarnet) elements, and one has a center frequency of 1.
1, and the other is tuned to the center frequency fb, and the difference f
, -f can be tuned almost constant over a wide band, saturation line detectors 4a and 4b with different polarities (positive and negative polarities) are connected to each filter output, and the outputs are video-summed. Therefore, it is possible to obtain a discrimination output whose amplitude changes between positive and negative in proportion to the carrier frequency of the high-frequency signal input.
従って、この弁別出力信号により広帯域同調発振器８の
粗同調信号を補正制御して人力信号に追随する発振周波
数を得ることができる。Therefore, the coarse tuning signal of the broadband tuning oscillator 8 can be corrected and controlled using this discrimination output signal to obtain an oscillation frequency that follows the human input signal.
従来の追尾発振器は以上のように構成されているので、
精度良く入力信号周波数に合致した出力信号を得るため
には広帯域にわたって周波数弁別回路と同じ感度特性を
持ち、かつ安定に発振する広帯域発振器を用いることが
必要である。しかし、７実際には同一の感度特性を持つ
広帯域発振器を実現することは困難であり、又同調後の
周波数ドリフト等もあり、人力信号に対し精度良く周波
数の合致した出力信号を得ることができないなどの欠点
があった。Since the conventional tracking oscillator is configured as described above,
In order to obtain an output signal that precisely matches the input signal frequency, it is necessary to use a wideband oscillator that has the same sensitivity characteristics as the frequency discrimination circuit over a wideband and that oscillates stably. However, in practice, it is difficult to realize a wideband oscillator with the same sensitivity characteristics, and there is also frequency drift after tuning, making it impossible to obtain an output signal that precisely matches the frequency of the human input signal. There were drawbacks such as.
この発明は上記のような問題点を解消するためになされ
たもので、広帯域にわたって入力信号周波数に合致した
出力信号を得ることのできる追尾発振器を得ることを目
的としている。The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a tracking oscillator that can obtain an output signal that matches the input signal frequency over a wide band.
この発明に係る追尾発振器は、出力高周波信号を周波数
弁別回路に帰還し、入力高周波信号との周波数誤差を演
算、補正し、入出力信号の周波数合致度を上げるように
したものである。The tracking oscillator according to the present invention feeds back the output high-frequency signal to the frequency discrimination circuit, calculates and corrects the frequency error with the input high-frequency signal, and increases the degree of frequency matching between the input and output signals.
この発明においては、入力高周波信号と出力高周波信号
を同一の周波数弁別回路により周波数弁別を行うことに
より、出力周波数の補正を行う構成としたから、広帯域
にわたって入力信号周波数に合致した出力信号を得るこ
とができる。In this invention, the output frequency is corrected by performing frequency discrimination between the input high frequency signal and the output high frequency signal using the same frequency discrimination circuit, so that it is possible to obtain an output signal that matches the input signal frequency over a wide band. I can do it.
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例による追尾発振器の構成を示
すブロック図であり、図において、１は連続波又はパル
ス変調波等の高周波信号入力端子、２は電力２分配回路
、ｉｔは周波数測定回路であり、例えば電力２分配回路
２．広帯域同調型バンドパスフィルタ３ａ及び３ｂ、飽
絡線検波器４ａ及び４ｂ、ビデオ加算回路５で構成され
る広帯域同調周波数弁別回路である。１５は切替タイミ
ング制御回路１６により制御され、上記周波数測定回路
１１への入力信号を切り替える切替回路、１７は高周波
信号入力のタイミング検出回路１３゜及び切替タイミン
グ制御回路１６により制御され、上記周波数弁別回路１
１の弁別出力信号レベルを増幅及び−時記憶、又は演算
後に一時記憶する周波数補正制御回路、７は上記周波数
補正回路１７の出力信号と、周波数同調制御回路９によ
り周波数弁別範囲１ｒｂｒ−１の中心ｆｃに同調する粗
同調信号との加算回路、８は広帯域発振器、１４は電力
２分配回路、１０は高周波信号出力端子である。FIG. 1 is a block diagram showing the configuration of a tracking oscillator according to an embodiment of the present invention. In the figure, 1 is a high frequency signal input terminal such as a continuous wave or a pulse modulated wave, 2 is a power 2 distribution circuit, and it is a frequency A measurement circuit, for example, a two-power distribution circuit 2. This is a wideband tunable frequency discriminator circuit composed of wideband tunable bandpass filters 3a and 3b, saturation line detectors 4a and 4b, and a video addition circuit 5. 15 is a switching circuit that is controlled by a switching timing control circuit 16 and switches the input signal to the frequency measuring circuit 11; 17 is a switching circuit that is controlled by the high frequency signal input timing detection circuit 13° and the switching timing control circuit 16, and is controlled by the frequency discrimination circuit 11; 1
A frequency correction control circuit 7 amplifies and stores the discrimination output signal level of 1, or temporarily stores it after calculation; 7 is a frequency correction control circuit that amplifies and temporarily stores the discrimination output signal level of 1; 8 is a wideband oscillator; 14 is a two-power distribution circuit; and 10 is a high-frequency signal output terminal.
次に動作について説明する。Next, the operation will be explained.
高周波入力端子ｌに印加された高周波信号は、第１図に
示す周波数弁別回路１１により従来の装置における周波
数弁別と同様に周波数弁別され、この弁別出力信号によ
り広帯域同調発振器８の粗同調信号を補正制御し、入力
信号に追随する発振周波数を得る。このとき、周波数弁
別回路１１と広帯域同調発振器８の感度特性は異なるた
め、人力高周波信号の搬送波ｆｏ （ｆ−＜ｆｏ ＜
ｆｂ ）に対し、出力高周波信号周波数はｆｌとなり、
周波数誤差を生ずる。この様子を第２図に示す。The high frequency signal applied to the high frequency input terminal l is subjected to frequency discrimination by the frequency discrimination circuit 11 shown in FIG. control and obtain an oscillation frequency that follows the input signal. At this time, since the sensitivity characteristics of the frequency discrimination circuit 11 and the broadband tuned oscillator 8 are different, the carrier wave fo (f-<fo<
fb ), the output high-frequency signal frequency is fl,
Causes frequency error. This situation is shown in FIG.
このようにして同調された出力高周波信号ｆ。The output high frequency signal f tuned in this way.
は電力２分配回路１４により２分配され、一方が切替回
路１５に入力され、切替タイミング制御回路１６により
間欠的に、（例えば入力高周波信号カハルス変調波であ
ればパルスとパルスの間等に切り替える）に、切替回路
１５を切り替えることにより出力高周波信号を周波数弁
別回路１１に入力し周波数弁別を行う。この弁別出力信
号により周波数補正制御回路１７において、周波数誤差
成分Ｖ ｏ Ｖ ｌを演算し、■。を基準とした補正
信号を出力することにより、広帯域同調発振器の周波数
誤差を制御する（この演算及び補正信号出力は切替タイ
ミング制御回路１６からのタイミング信号により起動さ
れる）。is divided into two by the power 2 distribution circuit 14, one is input to the switching circuit 15, and is intermittently controlled by the switching timing control circuit 16 (for example, if the input high-frequency signal is a Cajals modulated wave, it is switched between pulses, etc.) Then, by switching the switching circuit 15, the output high frequency signal is input to the frequency discrimination circuit 11 and frequency discrimination is performed. The frequency error component V o V l is calculated in the frequency correction control circuit 17 based on this discrimination output signal, and (2). The frequency error of the broadband tuned oscillator is controlled by outputting a correction signal based on (this calculation and correction signal output are activated by a timing signal from the switching timing control circuit 16).
この動作を繰り返すことにより入出力高周波信号の周波
数合致度を上げることができ、常に入力高周波信号の搬
送波に追随する出力高周波信号を得ることができる。By repeating this operation, it is possible to increase the degree of frequency matching between the input and output high-frequency signals, and it is possible to obtain an output high-frequency signal that always follows the carrier wave of the input high-frequency signal.
なお、上記実施例では周波数の分析に周波数弁別回路１
１を用いたものを示したが、周波数の分析には、瞬時周
波数測定回路、あるいはチャネライズド受信分析回路を
用いてもよく、上記と同様の効果を奏する。In addition, in the above embodiment, the frequency discrimination circuit 1 is used for frequency analysis.
1 is shown, however, an instantaneous frequency measuring circuit or a channelized reception analysis circuit may be used for frequency analysis, and the same effects as described above can be obtained.
以上のように、この発明によれば、出力高周波信号を間
欠的に周波数弁別回路に帰還し、周波数の補正を行なう
ように槽底したので、常に精度良く高周波人力信号に追
随できる追尾発振器を得られる効果がある。As described above, according to the present invention, the output high-frequency signal is intermittently fed back to the frequency discrimination circuit to correct the frequency, so that a tracking oscillator that can always accurately follow the high-frequency human signal is obtained. It has the effect of
第１図はこの発明の一実施例による追尾発振器の構成図
、第２図は周波数誤差発生の様子を示す説明図、第３図
は従来の追尾発振器の構成図、第４図は周波数弁別特性
を示す説明図である。
１・・・高周波信号入力端子、２・・・電力２分配回路
、３ａ、３ｂ・・・同調型バンドパスフィルタ、４ａ。
４ｂ・・・飽絡線検波器、５・・・ビデオ加算器、６・
・・周波数補正制御回路、７・・・周波数制御信号の加
算回路、８・・・広帯域発振器、９・・・周波数同調制
御回路、１０・・・高周波信号出力端子、１１・・・広
帯域同調周波数弁別回路、１２・・・電力２分配回路、
１３・・・タイミング検出回路、１４・・・電力２分配
回路、１５・・・切替回路、１６・・・切替タイミング
制御回路、１７・・・周波数補正制御回路。
なお図中同一符号は同−又は相当部分を示す。Fig. 1 is a block diagram of a tracking oscillator according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing how frequency errors occur, Fig. 3 is a block diagram of a conventional tracking oscillator, and Fig. 4 is a frequency discrimination characteristic. FIG. DESCRIPTION OF SYMBOLS 1... High frequency signal input terminal, 2... Power 2 distribution circuit, 3a, 3b... Tunable band pass filter, 4a. 4b... Saturation line detector, 5... Video adder, 6.
... Frequency correction control circuit, 7... Frequency control signal addition circuit, 8... Wideband oscillator, 9... Frequency tuning control circuit, 10... High frequency signal output terminal, 11... Wideband tuning frequency Discrimination circuit, 12...2 power distribution circuit,
13... Timing detection circuit, 14... Power 2 distribution circuit, 15... Switching circuit, 16... Switching timing control circuit, 17... Frequency correction control circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
振器において、 出力高周波信号の一部を間かつ的に周波数弁別回路に帰
還する切替回路を備え、入力高周波信号と出力高周波信
号との誤差を、演算補正するようにしたことを特徴とす
る追尾発振器。(1) A tracking oscillator that tracks the carrier frequency of an input high-frequency signal is equipped with a switching circuit that temporarily returns a part of the output high-frequency signal to the frequency discrimination circuit, and eliminates the error between the input high-frequency signal and the output high-frequency signal. A tracking oscillator characterized by performing calculation correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17884889A JPH0344111A (en) | 1989-07-11 | 1989-07-11 | Tracing oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17884889A JPH0344111A (en) | 1989-07-11 | 1989-07-11 | Tracing oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0344111A true JPH0344111A (en) | 1991-02-26 |
Family
ID=16055732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17884889A Pending JPH0344111A (en) | 1989-07-11 | 1989-07-11 | Tracing oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344111A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518172A (en) * | 1978-07-26 | 1980-02-08 | Fujitsu Ltd | Automatic frequency control circuit |
| JPH01165227A (en) * | 1987-12-21 | 1989-06-29 | Mitsubishi Electric Corp | Frequency tracking oscillator |
-
1989
- 1989-07-11 JP JP17884889A patent/JPH0344111A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518172A (en) * | 1978-07-26 | 1980-02-08 | Fujitsu Ltd | Automatic frequency control circuit |
| JPH01165227A (en) * | 1987-12-21 | 1989-06-29 | Mitsubishi Electric Corp | Frequency tracking oscillator |
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