JP3034170B2 - Saturation prevention gain circuit - Google Patents
Saturation prevention gain circuitInfo
- Publication number
- JP3034170B2 JP3034170B2 JP6246380A JP24638094A JP3034170B2 JP 3034170 B2 JP3034170 B2 JP 3034170B2 JP 6246380 A JP6246380 A JP 6246380A JP 24638094 A JP24638094 A JP 24638094A JP 3034170 B2 JP3034170 B2 JP 3034170B2
- Authority
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- Prior art keywords
- amount
- circuit
- stc
- cagc
- saturation prevention
- 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.)
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Description
【０００１】[0001]
【産業上の利用分野】この発明は、パルスドプラレーダ
装置の受信機の飽和防止利得回路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saturation prevention gain circuit for a receiver of a pulse Doppler radar apparatus.
【０００２】[0002]
【従来の技術】図９は、近距離での受信利得を低下させ
るＳＴＣ回路（例えば特開昭６１−２１０９７９号公
報）、受信機の飽和を防止するＣＡＧＣ回路（例えば特
開昭６１−３０７６８２号公報）を備えたパルスドプラ
レーダ装置の概略である。図１０はＣＡＧＣ回路の構成
図である。2. Description of the Related Art FIG. 9 shows an STC circuit (for example, Japanese Unexamined Patent Publication No. Sho 61-210979) for lowering the reception gain at a short distance, and a CAGC circuit for preventing the saturation of the receiver (for example, Japanese Unexamined Patent Publication No. Sho 61-307682). 1 is a schematic diagram of a pulsed Doppler radar device provided with a gazette. FIG. 10 is a configuration diagram of the CAGC circuit.
【０００３】図９において、１はＳＴＣ回路、２はＳＴ
Ｃ回路１に接続されたＣＡＧＣ回路、３はＣＡＧＣ回路
２に接続された検波器、４は検波器３に接続されたＡ／
Ｄ変換器、５はＡ／Ｄ変換器４に接続されたドプラフィ
ルタ、６はドプラフィルタ５に接続された目標検出回路
である。図１０において、２ａは受信レベル検出回路、
２ｂは受信レベル検出回路２ａに接続されたＣＡＧＣ量
算出回路、２ｃはＣＡＧＣ量算出回路２ｂに接続された
ＣＡＧＣ減衰器である。In FIG. 9, 1 is an STC circuit, and 2 is an STC circuit.
The CAGC circuit connected to the C circuit 1, 3 is a detector connected to the CAGC circuit 2, and 4 is an A / C connected to the detector 3.
A D converter 5 is a Doppler filter connected to the A / D converter 4, and 6 is a target detection circuit connected to the Doppler filter 5. In FIG. 10, 2a is a reception level detection circuit,
2b is a CAGC amount calculation circuit connected to the reception level detection circuit 2a, and 2c is a CAGC attenuator connected to the CAGC amount calculation circuit 2b.
【０００４】次に動作について、図９を用いて説明す
る。説明を簡単にするために、検波器３以降の動作から
説明する。入力信号は、検波器３においてビデオ信号
に、Ａ／Ｄ変換器４においてデジタル信号に、ドプラフ
ィルタ５においてドプラ周波数信号に変換される。ドプ
ラ周波数信号は、目標検出回路にて目標信号として検出
される。Next, the operation will be described with reference to FIG. For simplicity, the operation from the detector 3 will be described. The input signal is converted into a video signal in the detector 3, a digital signal in the A / D converter 4, and a Doppler frequency signal in the Doppler filter 5. The Doppler frequency signal is detected by the target detection circuit as a target signal.
【０００５】ＣＡＧＣ回路２は、受信機の飽和レベルを
越える信号が入力された場合に、ドプラフィルタ５にお
ける目標信号とは異なる周波数成分の発生を防止するた
めの飽和防止利得回路である。図１０〜１３を用いてＣ
ＡＧＣ回路２の説明をする。受信レベル検出回路２ａ
は、図１１の入力信号のレベルの検出を行う。ＣＡＧＣ
量算出回路２ｂは受信レベル検出回路２ａで検出された
レベルと飽和レベルの差より、図１２に示すＣＡＧＣ量
を算出する。ＣＡＧＣ減衰器２ｃはＣＡＧＣ量に従い、
入力信号に補正を行い、図１３に示す飽和レベル以下に
抑えた出力信号を出力する。[0005] The CAGC circuit 2 is a saturation prevention gain circuit for preventing the occurrence of frequency components different from the target signal in the Doppler filter 5 when a signal exceeding the saturation level of the receiver is input. C using FIGS.
The AGC circuit 2 will be described. Receive level detection circuit 2a
Performs the detection of the level of the input signal in FIG. CAGC
The amount calculation circuit 2b calculates the CAGC amount shown in FIG. 12 from the difference between the level detected by the reception level detection circuit 2a and the saturation level. The CAGC attenuator 2c follows the CAGC amount,
The input signal is corrected, and an output signal suppressed to a saturation level or less shown in FIG. 13 is output.
【０００６】ＳＴＣ回路１は、距離による目標受信信号
レベルの変化を抑えるための近距離での受信機利得を低
下させる回路である。図１４及び図１５を用いてＳＴＣ
回路の説明をする。目標受信信号レベルは図１５ａに示
すように近距離では強大、遠距離では微弱となり、距離
による変化が著しい。この変化を抑えるものがＳＴＣ回
路であり、図１４ｂに示すように受信機利得を近距離で
は小さく、遠距離では大きくする特性を有している。し
たがって、ＳＴＣ回路に入力された目標受信信号は図１
５ｂに示すように距離の遠近による変化の少ない信号に
変換され、出力され、ＳＴＣ回路以後のダイナミックレ
ンジが小さくてすむ効果がある。[0006] The STC circuit 1 is a circuit for lowering a receiver gain at a short distance to suppress a change in a target reception signal level due to a distance. STC using FIGS. 14 and 15
The circuit will be described. As shown in FIG. 15A, the target reception signal level is strong at a short distance and weak at a long distance, and changes significantly with the distance. The STC circuit suppresses this change. As shown in FIG. 14B, the STC circuit has a characteristic that the receiver gain is small at a short distance and large at a long distance. Therefore, the target reception signal input to the STC circuit is shown in FIG.
As shown in FIG. 5B, the signal is converted into a signal having little change depending on the distance and output, and the dynamic range after the STC circuit can be reduced.
【０００７】[0007]
【発明が解決しようとする課題】従来のパルスドプラレ
ーダ装置の受信機の飽和防止利得回路は以上のように構
成されているので、回路規模が増大し、航空機等への搭
載上の欠点があるという問題点があった。Since the saturation prevention gain circuit of the receiver of the conventional pulsed Doppler radar apparatus is constructed as described above, the circuit scale is increased and there is a drawback in mounting on an aircraft or the like. There was a problem.
【０００８】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、回路規模を縮少させた飽和防止
利得回路を得ることを目的とする。The present invention has been made to solve the above problems, and has as its object to obtain a saturation prevention gain circuit with a reduced circuit scale.
【０００９】[0009]
【課題を解決するための手段】請求項１の飽和防止利得
回路は、入力信号のレベルを検出する受信レベル検出回
路と、この受信レベル検出回路で検出されたレベルと飽
和レベルの差の減衰量（以下、ＣＡＧＣ（Ｃｌｕｔｔｅ
ｒ Ａｕｔｏｍａｔｉｃ Ｇａｉｎ Ｃｏｎｔｒｏｌ）
量という）を算出するＣＡＧＣ量算出回路と、近距離用
減衰量（以下、ＳＴＣ（Ｓｅｎｓｉｔｉｖｉｔｙ Ｔｉ
ｍｅ Ｃｏｎｔｒｏｌ）量という）を設定するＳＴＣ量
設定回路と、前記ＣＡＧＣ量とＳＴＣ量で制御されるＣ
ＡＧＣ減衰器と、を備えたものである。According to a first aspect of the present invention, a saturation prevention gain circuit includes a reception level detection circuit for detecting a level of an input signal, and an amount of attenuation of a difference between the level detected by the reception level detection circuit and a saturation level. (Hereinafter CAGC (Clutte
r Automatic Gain Control)
Amount) and a short-range attenuation amount (hereinafter referred to as STC (Sensitivity Ti).
and an STC amount setting circuit for setting the amount of CTC controlled by the CAGC amount and the STC amount.
An AGC attenuator.
【００１０】請求項２の飽和防止利得回路は、請求項１
記載の飽和防止利得回路において、ＣＡＧＣ量とＳＴＣ
量とを入力とし、その出力でＣＡＧＣ減衰器を制御する
制御手段を備えたものである。 [0010] anti-saturation gain circuit according to claim 2, claim 1
In the saturation prevention gain circuit described, the CAGC amount and the STC
And control the CAGC attenuator with its output
It is provided with control means.
【００１１】請求項３の飽和防止利得回路は、請求項２
記載の飽和防止利得回路において、制御手段を、ＣＡＧ
Ｃ量とＳＴＣ量とを合成する加算回路で構成したもので
ある。 [0011] anti-saturation gain circuit according to claim 3, claim 2
In the saturation prevention gain circuit described above,
It is composed of an addition circuit that combines the C amount and the STC amount.
is there.
【００１２】請求項４の飽和防止利得回路は、請求項２
記載の飽和防止利得回路において、制御手段を、ＣＡＧ
Ｃ量とＳＴＣ量の大小比較を行い、選択した大きい方で
ＣＡＧＣ減衰器を減衰制御する大選択回路で構成したも
のである。 [0012] anti-saturation gain circuit according to claim 4, claim 2
In the saturation prevention gain circuit described above,
Compare the C amount and STC amount, and select the larger one
The CAGC attenuator is composed of a large selection circuit that controls attenuation.
It is.
【００１３】請求項５の飽和防止利得回路は、請求項３
記載のものにおいて、ＳＴＣ量の合成量を、母機高度情
報等により変化させることができるＳＴＣ量調整回路を
備えたものである。A fifth aspect of the present invention provides a saturation prevention gain circuit.
In the apparatus described above, an STC amount adjustment circuit capable of changing the combined amount of the STC amount based on base unit altitude information or the like is provided.
【００１４】請求項６の飽和防止利得回路は、請求項４
記載のものにおいて、ＳＴＣ量の合成量を、母機高度情
報等により変化させることができるＳＴＣ量調整回路を
備えたものである。According to a sixth aspect of the present invention, there is provided a saturation preventing gain circuit according to the fourth aspect.
In the apparatus described above, an STC amount adjustment circuit capable of changing the combined amount of the STC amount based on base unit altitude information or the like is provided.
【００１５】請求項７の飽和防止利得回路は、請求項３
記載のものにおいて、一つのＳＴＣ量設定回路を複数チ
ャンネルで共用するものである。According to a seventh aspect of the present invention, there is provided a saturation preventing gain circuit according to the third aspect.
In the description, one STC amount setting circuit is shared by a plurality of channels.
【００１６】請求項８の飽和防止利得回路は、請求項４
記載のものにおいて、一つのＳＴＣ量設定回路を複数チ
ャンネルで共用するものである。According to the eighth aspect of the present invention, there is provided a saturation prevention gain circuit.
In the description, one STC amount setting circuit is shared by a plurality of channels.
【００１７】請求項９の飽和防止利得回路は、請求項５
記載のものにおいて、一つのＳＴＣ量設定回路とＳＴＣ
量調整回路を複数チャンネルで共用するものである。According to a ninth aspect of the present invention, there is provided a saturation prevention gain circuit according to the fifth aspect.
In the description, one STC amount setting circuit and an STC
The quantity adjustment circuit is shared by a plurality of channels.
【００１８】請求項１０の飽和防止利得回路は、請求項
６記載のものにおいて、一つのＳＴＣ量設定回路とＳＴ
Ｃ量調整回路を複数チャンネルで共用するものである。In a tenth aspect of the present invention, there is provided the saturation prevention gain circuit according to the sixth aspect, wherein one STC amount setting circuit and one STC amount setting circuit are provided.
The C amount adjustment circuit is shared by a plurality of channels.
【００１９】[0019]
【作用】請求項１の飽和防止利得回路は、ＣＡＧＣ減衰
器をＳＴＣ用とＣＡＧＣ用で共用するので、回路を小型
化できる。In the saturation prevention gain circuit according to the first aspect, the CAGC attenuator is commonly used for the STC and the CAGC, so that the circuit can be downsized.
【００２０】請求項２の飽和防止利得回路は、ＣＡＧＣ
減衰器をＳＴＣ量とＣＡＧＣ量で制御するので、回路を
小型化できる。A second aspect of the present invention provides a saturation prevention gain circuit comprising:
Since the attenuator is controlled by the STC amount and the CAGC amount, the circuit can be downsized.
【００２１】請求項３の飽和防止利得回路は、ＳＴＣ用
とＣＡＧＣ用の減衰器を共通にすることができ、回路規
模を縮少させることができる。According to the third aspect of the present invention, the attenuator for the STC and the attenuator for the CAGC can be used in common, and the circuit scale can be reduced.
【００２２】請求項４の飽和防止利得回路は、ＳＴＣ量
とＣＡＧＣ量の大選択を行っているので必要以上の減衰
制御を行うことがなく、より適切な受信利得を得ること
ができる。According to the fourth aspect of the present invention, since a large selection is made between the STC amount and the CAGC amount, it is possible to obtain a more appropriate reception gain without performing unnecessary attenuation control.
【００２３】請求項５の飽和防止利得回路は、母機高度
により、ＳＴＣ量を調整することができるので、高度に
適した受信機利得を得ることができる。In the saturation prevention gain circuit according to the fifth aspect, the STC amount can be adjusted according to the altitude of the base unit, so that a receiver gain suitable for the altitude can be obtained.
【００２４】請求項６の飽和防止利得回路は、ＳＴＣ量
とＣＡＧＣ量の大選択を行っているので必要以上の減衰
制御を行うことがなく、より適切な受信利得を得ること
ができると共に、母機高度により、ＳＴＣ量を調整する
ことができるので、高度に適した受信機利得を得ること
ができる。According to the sixth aspect of the present invention, a large selection of the STC amount and the CAGC amount is performed, so that unnecessary attenuation control is not performed and a more appropriate reception gain can be obtained. Since the STC amount can be adjusted depending on the altitude, a receiver gain suitable for the altitude can be obtained.
【００２５】請求項７の飽和防止利得回路は、回路規模
を縮少させることができる。According to the seventh aspect of the present invention, the circuit scale can be reduced.
【００２６】請求項８の飽和防止利得回路は、ＳＴＣ量
とＣＡＧＣ量の大選択を行っているので必要以上の減衰
制御を行うことがなく、より適切な受信利得を得ること
ができると共に、回路規模を縮少させることができる。In the saturation prevention gain circuit according to the present invention, the STC amount and the CAGC amount are largely selected, so that unnecessary attenuation control is not performed and a more appropriate reception gain can be obtained. The scale can be reduced.
【００２７】請求項９の飽和防止利得回路は、母機高度
により、ＳＴＣ量を調整することができるので、高度に
適した受信機利得を得ることができると共に、回路規模
を縮少させることができる。In the saturating prevention gain circuit according to the ninth aspect, the STC amount can be adjusted according to the altitude of the base unit, so that a receiver gain suitable for the altitude can be obtained and the circuit scale can be reduced. .
【００２８】請求項１０の飽和防止利得回路は、ＳＴＣ
量とＣＡＧＣ量の大選択を行っているので必要以上の減
衰制御を行うことがなく、より適切な受信利得を得るこ
とができ、母機高度により、ＳＴＣ量を調整することが
できるので、高度に適した受信機利得を得ることができ
ると共に、回路規模を縮少させることができる。The saturation prevention gain circuit according to the tenth aspect is characterized in that:
Since the amount and the amount of CAGC are largely selected, unnecessary attenuation control is not performed, a more appropriate reception gain can be obtained, and the STC amount can be adjusted by the altitude of the base unit. An appropriate receiver gain can be obtained, and the circuit scale can be reduced.
【００２９】[0029]
実施例１．以下、この発明の実施例１を図について説明
する。図１は、本発明の実施例１による飽和防止利得回
路を示し、図において、２ａ，２ｂ及び２ｃは従来のＣ
ＡＧＣ回路と同一のものであるので説明は省略する。７
はＣＡＧＣ量算出回路２ｂに接続された加算回路、８は
加算回路７に接続されたＳＴＣ量設定回路である。Embodiment 1 FIG. Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a saturation prevention gain circuit according to a first embodiment of the present invention, in which 2a, 2b and 2c denote conventional C
The description is omitted because it is the same as the AGC circuit. 7
Is an addition circuit connected to the CAGC amount calculation circuit 2b, and 8 is an STC amount setting circuit connected to the addition circuit 7.
【００３０】図１の実施例１において、従来のものと異
なる動作について説明する。ＳＴＣ量設定回路８には、
ＳＴＣ量が設定されており、その出力はＣＡＧＣ量算出
回路２ｂからの出力であるＣＡＧＣ量と加算回路７にお
いてＣＡＧＣサンプリング信号に同期して加算される。
ＣＡＧＣ減衰器２ｃは加算回路７からの出力によりＳＴ
Ｃ量とＣＡＧＣ量の加算分の減衰制御を受ける。The operation of the first embodiment shown in FIG. 1 which is different from the conventional one will be described. The STC amount setting circuit 8 includes:
The STC amount is set, and its output is added to the CAGC amount output from the CAGC amount calculation circuit 2b in the adding circuit 7 in synchronization with the CAGC sampling signal.
The CAGC attenuator 2c outputs the signal ST
It receives attenuation control for the addition of the C amount and the CAGC amount.
【００３１】この実施例１によれば、ＳＴＣ用とＣＡＧ
Ｃ用の減衰器を共通にすることができ、回路規模を縮少
させることができる。According to the first embodiment, for STC and CAG
A common attenuator for C can be used, and the circuit scale can be reduced.
【００３２】実施例２．上記実施例では、加算回路７で
ＳＴＣ量とＣＡＧＣ量を加算する構成を示したが、図２
に示すように大選択回路９でＣＡＧＣサンプリング信号
毎にＳＴＣ量とＣＡＧＣ量の大小比較を行い、大きい方
でＣＡＧＣ減衰器の減衰制御を行う構成としてもよい。Embodiment 2 FIG. In the above embodiment, the configuration in which the addition circuit 7 adds the STC amount and the CAGC amount has been described.
As shown in (2), the large selection circuit 9 may compare the STC amount and the CAGC amount for each CAGC sampling signal, and may control the attenuation of the CAGC attenuator by the larger one.
【００３３】実施例１の場合は、ＳＴＣ量とＣＡＧＣ量
の加算結果で減衰制御を行うため、近距離において必要
以上の減衰をしてしまうことがあるが、本実施例の場合
は、ＳＴＣ量とＣＡＧＣ量の大選択を行っているため、
必要以上の減衰制御を行うことがなく、より適切な受信
利得を得ることができる。In the case of the first embodiment, since the attenuation control is performed based on the result of adding the STC amount and the CAGC amount, the attenuation may be more than necessary at short distances. And large selection of CAGC amount,
It is possible to obtain a more appropriate reception gain without performing unnecessary attenuation control.
【００３４】実施例３．実施例１に対して、図３に示す
ように母機高度情報等によるＳＴＣ量合成制御をするＳ
ＴＣ量調整回路１０を追加してもよい。この場合、母機
高度により、ＳＴＣ量を調整することができるので、高
度に適した受信機利得を得ることができる。また、特に
母機が高高度にある場合、つまり地面等からの反射信号
の強度が小さい場合にはＳＴＣの必要性が小さいためＳ
ＴＣ量を０に調整することで受信機利得を最大とするこ
とができる。Embodiment 3 FIG. In contrast to the first embodiment, as shown in FIG.
A TC amount adjustment circuit 10 may be added. In this case, since the STC amount can be adjusted according to the height of the base unit, a receiver gain suitable for the height can be obtained. In particular, when the base unit is at a high altitude, that is, when the intensity of the reflected signal from the ground or the like is small, the necessity of the STC is small, so that S
By adjusting the TC amount to 0, the receiver gain can be maximized.
【００３５】実施例４．実施例２と実施例３を同時に実
施してもよい。この場合のブロック図を図４に示す。こ
の場合、実施例２と３の両方の効果がある。Embodiment 4 FIG. The second embodiment and the third embodiment may be performed simultaneously. FIG. 4 shows a block diagram in this case. In this case, the effects of both the second and third embodiments are obtained.
【００３６】実施例５．実施例１では、１チャンネルの
例について示したが、ＳＴＣ量設定回路を１つとし、こ
れを複数のチャンネルで共有としてもよい。この場合の
ブロック図を図５に示す。この場合、実施例１を複数チ
ャンネル備えたものと、ほぼ同等の効果を得ることがで
き、かつ回路規模を縮少することができる。Embodiment 5 FIG. In the first embodiment, an example of one channel has been described. However, one STC amount setting circuit may be used and shared by a plurality of channels. A block diagram in this case is shown in FIG. In this case, it is possible to obtain substantially the same effects as those of the first embodiment having a plurality of channels, and it is possible to reduce the circuit scale.
【００３７】実施例６．実施例２と実施例５を同時に実
施してもよい。この場合のブロック図を図６に示す。こ
の場合、実施例２と５の両方の効果がある。Embodiment 6 FIG. The second embodiment and the fifth embodiment may be performed simultaneously. FIG. 6 shows a block diagram in this case. In this case, the effects of both the second and fifth embodiments are obtained.
【００３８】実施例７．実施例３と実施例５を同時に実
施してもよい。この場合のブロック図を図７に示す。こ
の場合、実施例３と５の両方の効果がある。Embodiment 7 FIG. The third embodiment and the fifth embodiment may be performed simultaneously. FIG. 7 shows a block diagram in this case. In this case, the effects of both the third and fifth embodiments are obtained.
【００３９】実施例８．実施例２と実施例３と実施例５
を同時に実施してもよい。この場合のブロック図を図８
に示す。この場合、実施例２と３と５の全ての効果があ
る。Embodiment 8 FIG. Example 2, Example 3, and Example 5
May be performed simultaneously. A block diagram in this case is shown in FIG.
Shown in In this case, all the effects of the second, third, and fifth embodiments are obtained.
【００４０】[0040]
【発明の効果】請求項１の飽和防止利得回路は、入力信
号のレベルを検出する受信レベル検出回路と、この受信
レベル検出回路で検出されたレベルと飽和レベルの差の
減衰量（以下、ＣＡＧＣ（Ｃｌｕｔｔｅｒ Ａｕｔｏｍ
ａｔｉｃ Ｇａｉｎ Ｃｏｎｔｒｏｌ）量という）を算
出するＣＡＧＣ量算出回路と、近距離用減衰量（以下、
ＳＴＣ（Ｓｅｎｓｉｔｉｖｉｔｙ Ｔｉｍｅ Ｃｏｎｔ
ｒｏｌ）量という）を設定するＳＴＣ量設定回路と、前
記ＣＡＧＣ量とＳＴＣ量で制御されるＣＡＧＣ減衰器
と、を備えた構成にしたので、ＣＡＧＣ減衰器をＳＴＣ
用とＣＡＧＣ用で共用するので、回路を小型化できる。According to a first aspect of the present invention, a saturation prevention gain circuit includes a reception level detection circuit for detecting a level of an input signal, and an attenuation amount (hereinafter referred to as CAGC) of a difference between a level detected by the reception level detection circuit and a saturation level. (Clutter Autom
atic gain control amount), and a short-range attenuation amount (hereinafter, referred to as “attenuated gain control amount”).
STC (Sensitivity Time Cont)
(hereinafter referred to as "ROC amount"), and a CAGC attenuator controlled by the CAGC amount and the STC amount.
The circuit can be miniaturized because it is shared between the circuit and the CAGC.
【００４１】請求項２の飽和防止利得回路は、請求項１
記載の飽和防止利得回路において、ＣＡＧＣ量とＳＴＣ
量とを入力とし、その出力でＣＡＧＣ減衰器を制御する
制御手段を備えた構成にしたので、ＣＡＧＣ減衰器をＳ
ＴＣ量とＣＡＧＣ量で制御するので、回路を小型化でき
る。The anti-saturation gain circuit according to claim 2, claim 1
In the saturation prevention gain circuit described, the CAGC amount and the STC
And control the CAGC attenuator with its output
Since the control means is provided, the CAGC attenuator is set to S
Since the control is performed using the TC amount and the CAGC amount, the circuit can be downsized.
【００４２】請求項３の飽和防止利得回路は、請求項２
記載の飽和防止利得回路において、制御手段を、ＣＡＧ
Ｃ量とＳＴＣ量とを合成する加算回路で構成したので、
ＳＴＣ用とＣＡＧＣ用の減衰器を共通にすることがで
き、回路規模を縮少させることができる。The anti-saturation gain circuit according to claim 3, claim 2
In the saturation prevention gain circuit described above,
Because have configured in summing circuit for combining the C amount and the STC amount,
A common attenuator for STC and CAGC can be used, and the circuit scale can be reduced.
【００４３】請求項４の飽和防止利得回路は、請求項２
記載の飽和防止利得回路において、制御手段を、ＣＡＧ
Ｃ量とＳＴＣ量の大小比較を行い、選択した大きい方で
ＣＡＧＣ減衰器を減衰制御する大選択回路で構成したの
で、ＳＴＣ量とＣＡＧＣ量の大選択を行っているので必
要以上の減衰制御を行うことがなく、より適切な受信利
得を得ることができる。The anti-saturation gain circuit according to claim 4, claim 2
In the saturation prevention gain circuit described above,
Compare the C amount and STC amount, and select the larger one
Since the CAGC attenuator have configured a large selection circuit for attenuation control, since performing a large selection of STC amount and CAGC amount without undue attenuation control, to obtain a better reception gain it can.
【００４４】請求項５の飽和防止利得回路は、請求項３
記載のものにおいて、ＳＴＣ量の合成量を、母機高度情
報等により変化させることができるＳＴＣ量調整回路を
備えた構成にしたので、母機高度により、ＳＴＣ量を調
整することができ、高度に適した受信機利得を得ること
ができる。According to a fifth aspect of the present invention, there is provided a saturation preventing gain circuit according to the third aspect.
In the configuration described above, an STC amount adjustment circuit capable of changing the combined amount of the STC amount based on the base unit altitude information or the like is provided, so that the STC amount can be adjusted according to the base unit altitude and is suitable for the altitude. Receiver gain can be obtained.
【００４５】請求項６の飽和防止利得回路は、請求項４
記載のものにおいて、ＳＴＣ量の合成量を、母機高度情
報等により変化させることができるＳＴＣ量調整回路を
備えた構成にしたので、ＳＴＣ量とＣＡＧＣ量の大選択
を行っているので必要以上の減衰制御を行うことがな
く、より適切な受信利得を得ることができると共に、母
機高度により、ＳＴＣ量を調整することができるので、
高度に適した受信機利得を得ることができる。According to the sixth aspect of the present invention, there is provided a saturation prevention gain circuit.
In the configuration described above, a configuration is provided with an STC amount adjustment circuit that can change the combined amount of the STC amounts according to the base unit altitude information and the like. Since it is possible to obtain a more appropriate reception gain without performing attenuation control and to adjust the STC amount according to the altitude of the base unit,
A highly suitable receiver gain can be obtained.
【００４６】請求項７の飽和防止利得回路は、請求項３
記載のものにおいて、一つのＳＴＣ量設定回路を複数チ
ャンネルで共用する構成にしたので、回路規模を縮少さ
せることができる。According to the seventh aspect of the present invention, there is provided a saturation preventing gain circuit according to the third aspect.
In the configuration described above, since one STC amount setting circuit is shared by a plurality of channels, the circuit scale can be reduced.
【００４７】請求項８の飽和防止利得回路は、請求項４
記載のものにおいて、一つのＳＴＣ量設定回路を複数チ
ャンネルで共用する構成にしたので、ＳＴＣ量とＣＡＧ
Ｃ量の大選択を行っているので必要以上の減衰制御を行
うことがなく、より適切な受信利得を得ることができる
と共に、回路規模を縮少させることができる。According to the eighth aspect of the present invention, there is provided a saturation prevention gain circuit.
In the description, one STC amount setting circuit is configured to be shared by a plurality of channels.
Since a large selection of the C amount is performed, unnecessary attenuation control is not performed, a more appropriate reception gain can be obtained, and the circuit scale can be reduced.
【００４８】請求項９の飽和防止利得回路は、請求項５
記載のものにおいて、一つのＳＴＣ量設定回路とＳＴＣ
量調整回路を複数チャンネルで共用する構成にしたの
で、母機高度により、ＳＴＣ量を調整することができる
ので、高度に適した受信機利得を得ることができると共
に、回路規模を縮少させることができる。According to the ninth aspect of the present invention, there is provided a saturation preventing gain circuit according to the fifth aspect.
In the description, one STC amount setting circuit and an STC
Since the amount adjustment circuit is configured to be shared by a plurality of channels, the STC amount can be adjusted according to the altitude of the base unit, so that a receiver gain suitable for the altitude can be obtained and the circuit scale can be reduced. it can.
【００４９】請求項１０の飽和防止利得回路は、請求項
６記載のものにおいて、一つのＳＴＣ量設定回路とＳＴ
Ｃ量調整回路を複数チャンネルで共用する構成にしたの
で、ＳＴＣ量とＣＡＧＣ量の大選択を行っているので必
要以上の減衰制御を行うことがなく、より適切な受信利
得を得ることができ、母機高度により、ＳＴＣ量を調整
することができるので、高度に適した受信機利得を得る
ことができると共に、回路規模を縮少させることができ
る。A tenth aspect of the present invention is the saturation prevention gain circuit according to the sixth aspect, wherein one STC amount setting circuit and one STC amount setting circuit are provided.
Since the C amount adjustment circuit is configured to be shared by a plurality of channels, a large selection of the STC amount and the CAGC amount is performed, so that unnecessary attenuation control is not performed, and a more appropriate reception gain can be obtained. Since the STC amount can be adjusted according to the base unit altitude, a receiver gain suitable for the altitude can be obtained, and the circuit scale can be reduced.
【図１】 この発明による飽和防止利得回路の実施例１
のブロック図である。FIG. 1 is a first embodiment of a saturation prevention gain circuit according to the present invention;
It is a block diagram of.
【図２】 この発明による飽和防止利得回路の実施例２
のブロック図である。FIG. 2 is a second embodiment of a saturation prevention gain circuit according to the present invention;
It is a block diagram of.
【図３】 この発明による飽和防止利得回路の実施例３
のブロック図である。FIG. 3 is a third embodiment of a saturation prevention gain circuit according to the present invention;
It is a block diagram of.
【図４】 この発明による飽和防止利得回路の実施例４
のブロック図である。FIG. 4 is a fourth embodiment of a saturation prevention gain circuit according to the present invention;
It is a block diagram of.
【図５】 この発明による飽和防止利得回路の実施例５
のブロック図である。FIG. 5 is a fifth embodiment of a saturation prevention gain circuit according to the present invention;
It is a block diagram of.
【図６】 この発明による飽和防止利得回路の実施例６
のブロック図である。FIG. 6 shows a sixth embodiment of a saturation prevention gain circuit according to the present invention;
It is a block diagram of.
【図７】 この発明による飽和防止利得回路の実施例７
のブロック図である。FIG. 7 is a seventh embodiment of a saturation prevention gain circuit according to the present invention;
It is a block diagram of.
【図８】 この発明による飽和防止利得回路の実施例８
のブロック図である。FIG. 8 shows a saturation prevention gain circuit according to an eighth embodiment of the present invention;
It is a block diagram of.
【図９】 従来のパルスドプラレーダ装置のブロック図
である。FIG. 9 is a block diagram of a conventional pulse Doppler radar device.
【図１０】 従来のＣＡＧＣ回路のブロック図である。FIG. 10 is a block diagram of a conventional CAGC circuit.
【図１１】 従来のＣＡＧＣ回路の動作説明図である。FIG. 11 is a diagram illustrating the operation of a conventional CAGC circuit.
【図１２】 従来のＣＡＧＣ回路の動作説明図である。FIG. 12 is a diagram illustrating the operation of a conventional CAGC circuit.
【図１３】 従来のＣＡＧＣ回路の動作説明図である。FIG. 13 is a diagram illustrating the operation of a conventional CAGC circuit.
【図１４】 従来のＳＴＣ回路の動作説明図である。FIG. 14 is a diagram illustrating the operation of a conventional STC circuit.
【図１５】 従来のＳＴＣ回路の動作説明図である。FIG. 15 is a diagram illustrating the operation of a conventional STC circuit.
１ ＳＴＣ回路、２ ＣＡＧＣ回路、２ａ 受信レベル
検出回路、２ｂ ＣＡＧＣ量算出回路、２ｃ ＣＡＧＣ
減衰器、３ 検波器、４ Ａ／Ｄ変換器、５ドプラフィ
ルタ、６ 目標検出回路、７ 加算回路、８ ＳＴＣ量
設定回路、９ 大選択回路、１０ ＳＴＣ量調整回路。1 STC circuit, 2 CAGC circuit, 2a reception level detection circuit, 2b CAGC amount calculation circuit, 2c CAGC
Attenuator, 3 detector, 4 A / D converter, 5 Doppler filter, 6 target detection circuit, 7 addition circuit, 8 STC amount setting circuit, 9 large selection circuit, 10 STC amount adjustment circuit.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 安福 正樹 尼崎市塚口本町８丁目１番１号 三菱電 機株式会社 通信機製作所内 (72)発明者 萩尾 正廣 尼崎市塚口本町８丁目１番１号 三菱電 機株式会社 通信機製作所内 (56)参考文献 特開 昭63−158486（ＪＰ，Ａ) 特開 平４−318483（ＪＰ，Ａ) 特開 平５−203721（ＪＰ，Ａ) 特開 平４−157385（ＪＰ，Ａ) 特開 平３−81685（ＪＰ，Ａ) 特開 昭60−177280（ＪＰ，Ａ) 特開 昭61−210979（ＪＰ，Ａ) 特開 昭60−179673（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01S 7/00 - 7/42 G01S 13/00 - 13/95 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaki Anfuku 8-1-1, Tsukaguchi-Honcho, Amagasaki-shi Mitsubishi Electric Corporation Co., Ltd. Communication Equipment Works (72) Inventor Masahiro Hagio 8-1-1, Tsukaguchi-Honcho, Amagasaki-shi (56) References JP-A-63-158486 (JP, A) JP-A-4-318483 (JP, A) JP-A-5-203721 (JP, A) 4-157385 (JP, A) JP-A-3-81685 (JP, A) JP-A-60-177280 (JP, A) JP-A-61-210979 (JP, A) JP-A-60-177963 (JP, A) A) (58) Field surveyed (Int. Cl. 7 , DB name) G01S 7 /00-7/42 G01S 13/00-13/95
Claims (10)
検出回路と、この受信レベル検出回路で検出されたレベ
ルと飽和レベルの差の減衰量（以下、ＣＡＧＣ（Ｃｌｕ
ｔｔｅｒ Ａｕｔｏｍａｔｉｃ Ｇａｉｎ Ｃｏｎｔｒ
ｏｌ）量という）を算出するＣＡＧＣ量算出回路と、近
距離用減衰量（以下、ＳＴＣ（Ｓｅｎｓｉｔｉｖｉｔｙ
Ｔｉｍｅ Ｃｏｎｔｒｏｌ）量という）を設定するＳ
ＴＣ量設定回路と、前記ＣＡＧＣ量とＳＴＣ量で制御さ
れるＣＡＧＣ減衰器と、を備えた飽和防止利得回路。1. A reception level detection circuit for detecting a level of an input signal, and an attenuation of a difference between a level detected by the reception level detection circuit and a saturation level (hereinafter referred to as CAGC (Clu).
ter Automatic Gain Contr
ol) amount, a CAGC amount calculation circuit, and a short-distance attenuation amount (hereinafter, STC (Sensitivity)).
Time Control)
A saturation prevention gain circuit comprising: a TC amount setting circuit; and a CAGC attenuator controlled by the CAGC amount and the STC amount.
し、その出力で前記ＣＡＧＣ減衰器を制御する制御手段
を備えたことを特徴とする請求項１記載の飽和防止利得
回路。 2. The method according to claim 1, wherein the CAGC amount and the STC amount are input.
Control means for controlling the CAGC attenuator with its output
2. The saturation prevention gain according to claim 1, further comprising:
circuit.
Ｃ量とを合成する加算回路で構成したことを特徴とする
請求項２記載の飽和防止利得回路。 3. The method according to claim 2, wherein the control means controls the CAGC amount and ST.
It is characterized by comprising an addition circuit for synthesizing the C amount.
The saturation prevention gain circuit according to claim 2.
Ｃ量の大小比較を行い、選択した大きい方で前記ＣＡＧ
Ｃ減衰器を減衰制御する大選択回路で構成したことを特
徴とする請求項２記載の飽和防止利得回路。 4. The method according to claim 1, wherein the control means controls the CAGC amount and ST.
Compare the amount of C and compare the CAG
A special feature is that the C attenuator is configured with a large selection circuit that controls attenuation.
3. The saturation prevention gain circuit according to claim 2, wherein:
より変化させることができるＳＴＣ量調整回路を備えた
請求項３記載の飽和防止利得回路。5. The saturation prevention gain circuit according to claim 3, further comprising an STC amount adjusting circuit capable of changing a combined amount of the STC amount based on base unit altitude information or the like.
より変化させることができるＳＴＣ量調整回路を備えた
請求項４記載の飽和防止利得回路。6. The saturation prevention gain circuit according to claim 4, further comprising an STC amount adjusting circuit capable of changing a combined amount of the STC amount based on base unit altitude information or the like.
ルで共用することを特徴とする請求項３記載の飽和防止
利得回路。7. The saturation prevention gain circuit according to claim 3, wherein one STC amount setting circuit is shared by a plurality of channels.
ルで共用することを特徴とする請求項４記載の飽和防止
利得回路。8. The saturation prevention gain circuit according to claim 4, wherein one STC amount setting circuit is shared by a plurality of channels.
回路を複数チャンネルで共用することを特徴とする請求
項５記載の飽和防止利得回路。9. The saturation prevention gain circuit according to claim 5, wherein one STC amount setting circuit and STC amount adjustment circuit are shared by a plurality of channels.
整回路を複数チャンネルで共用することを特徴とする請
求項６記載の飽和防止利得回路。10. The saturation prevention gain circuit according to claim 6, wherein one STC amount setting circuit and one STC amount adjusting circuit are shared by a plurality of channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6246380A JP3034170B2 (en) | 1994-10-12 | 1994-10-12 | Saturation prevention gain circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6246380A JP3034170B2 (en) | 1994-10-12 | 1994-10-12 | Saturation prevention gain circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08110375A JPH08110375A (en) | 1996-04-30 |
| JP3034170B2 true JP3034170B2 (en) | 2000-04-17 |
Family
ID=17147686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6246380A Expired - Lifetime JP3034170B2 (en) | 1994-10-12 | 1994-10-12 | Saturation prevention gain circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3034170B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006046483A1 (en) * | 2004-10-26 | 2006-05-04 | Matsushita Electric Industrial Co., Ltd. | Radar device for mounting on vehicle |
-
1994
- 1994-10-12 JP JP6246380A patent/JP3034170B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08110375A (en) | 1996-04-30 |
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