JPH0590845A - Failure detecting circuit - Google Patents

Failure detecting circuit

Info

Publication number
JPH0590845A
JPH0590845A JP3252518A JP25251891A JPH0590845A JP H0590845 A JPH0590845 A JP H0590845A JP 3252518 A JP3252518 A JP 3252518A JP 25251891 A JP25251891 A JP 25251891A JP H0590845 A JPH0590845 A JP H0590845A
Authority
JP
Japan
Prior art keywords
signal
amplifier
level
monitoring signal
output
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.)
Withdrawn
Application number
JP3252518A
Other languages
Japanese (ja)
Inventor
Yoshihiko Saito
良彦 齋藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP3252518A priority Critical patent/JPH0590845A/en
Publication of JPH0590845A publication Critical patent/JPH0590845A/en
Withdrawn legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE:To enable a failure detecting circuit to avoid erroneous detection in one normally operating amplifier out of two amplifier when a failure occurs in the other amplifier by discriminating which gain drop caused the level drop of the monitoring signal. CONSTITUTION:When a failure occurs in power amplifier 4 and both the gain of amplifier 4 and that of amplifier 4' drop, a monitoring signal appears at the output of power composer 5 by a hybrid ring. The sum of the level of this monitoring signal and the level of the monitoring signal from level adjuster 10 is output from composer 5'. Accordingly, the level of the monitoring signal that is detected by detector 8 increases more than when no failure occurs. Further, when a failure occurs in amplifier 4' and its gain drops, a monitoring signal appear at the output of composer 5. This monitoring signal is different in phase by 180 deg. from the monitoring signal appearing when amplifier 4 fails. That is, the difference in level between this monitoring signal and the monitoring signal from adjuster 10 is output from composer 5, while the level that is lower than when no failure occurs is output from detector 8.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、2台の電力増幅器を並
列に動作させて使用する増幅器の場合において、監視用
信号を用いて増幅器の故障を検出する故障検出回路に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure detection circuit for detecting a failure of an amplifier using a monitoring signal in the case of an amplifier using two power amplifiers operated in parallel.

【0002】[0002]

【従来の技術】図2に示されるように、従来の故障検出
回路は、第1の監視信号を出力する監視信号発生器12
と、入力信号及び第1の監視信号を受け、それぞれ位相
の異なる第1及び第2の分配信号を出力する電力分配器
13と、第1の分配信号を受け第1の分配信号を増幅し
た信号を出力する電力増幅器14と、第2の分配信号を
受け第2の分配信号を増幅した信号を出力する電力増幅
器14´と、電力増幅器14及び14´から出力された
2つの信号を合成した合成信号を出力する電力合成器1
5と、前記合成信号を検出する検出器18とで構成され
る。
2. Description of the Related Art As shown in FIG. 2, a conventional fault detection circuit includes a supervisory signal generator 12 which outputs a first supervisory signal.
And a power divider 13 that receives an input signal and a first monitor signal and outputs first and second distribution signals having different phases, and a signal that receives the first distribution signal and amplifies the first distribution signal. , A power amplifier 14 that outputs a signal obtained by amplifying the second distributed signal, and a power amplifier 14 that outputs the signal and a combination that combines the two signals output from the power amplifiers 14 and 14 '. Power combiner 1 that outputs a signal
5 and a detector 18 for detecting the combined signal.

【0003】即ち、前記故障検出回路は電力合成器15
から出力された監視信号を検出器18により検出して、
電力増幅器14及び14′の利得の低下を常時監視して
いる。又、前記入力信号は、電力分配器13を通して電
力増幅器14及び14′に入力された後、電力合成器1
5を経て負荷16に入力される。
That is, the fault detection circuit is the power combiner 15
The detector 18 detects the monitor signal output from
The decrease in gain of the power amplifiers 14 and 14 'is constantly monitored. Also, the input signal is input to the power amplifiers 14 and 14 'through the power distributor 13, and then the power combiner 1
It is input to the load 16 via 5.

【0004】[0004]

【発明が解決しようとする課題】上述した従来の故障検
出回路は、並列運転されている2つの増幅器のどちらか
一方に故障が発生して監視信号のレベルが低下した場合
でも、検出器により検出される監視信号のレベルは低下
するので前記2つの増幅器のどちらかの増幅器の利得の
低下による監視信号のレベル低下であるのか区別がつか
ず、本来正常に動作している方の増幅器において故障の
誤検出がなされるという問題があった。
SUMMARY OF THE INVENTION The above-mentioned conventional fault detection circuit detects with a detector even when a fault occurs in one of two amplifiers operating in parallel and the level of the monitoring signal is lowered. Since the level of the supervisory signal is lowered, it cannot be distinguished whether the level of the supervisory signal is lowered due to the reduction of the gain of one of the two amplifiers. There was a problem that erroneous detection was made.

【0005】本発明の課題は、前記2つの増幅器のどち
らか一方に故障が発生した場合でも前記2つの増幅器の
どちらかの増幅器の利得の低下による監視信号のレベル
低下によるものか区別できる故障検出回路を提供するも
のである。
An object of the present invention is to detect a failure, which can be distinguished from a decrease in the level of the supervisory signal due to a decrease in the gain of one of the two amplifiers even when a failure occurs in one of the two amplifiers. A circuit is provided.

【0006】[0006]

【課題を解決するための手段】本発明によれば、第1の
監視信号と該第1の監視信号とは位相の異なる第2の監
視信号を出力する監視信号発生手段と、入力信号及び前
記第1の監視信号を受け、第1及び第2の分配信号を出
力する分配手段と、前記第1及び第2の分配信号を合成
して合成信号を出力する合成手段とを備え、前記分配手
段は、前記入力信号及び第1の監視信号を受け、該第1
の監視信号に対して第1の位相関係を有する第3の監視
信号を前記入力信号と共に含む前記第1の分配信号を出
力する第1の増幅器と、前記入力信号及び第1の監視信
号を受け、第1及び第3の監視信号に対して第2の位相
関係を有する第4の監視信号を前記入力信号と共に含む
前記第2の分配信号を出力する第2の増幅器とを備え、
さらに前記合成信号と第2の監視信号との間の位相関係
から、前記第1の増幅器及び第2の増幅器における故障
を検出する手段を有していることを特徴とする故障検出
回路が得られる。
According to the present invention, a supervisory signal generating means for outputting a first supervisory signal and a second supervisory signal having a phase different from that of the first supervisory signal, an input signal and the supervisory signal generating means. The distributing means includes a distributing means for receiving the first monitoring signal and outputting the first and second distributing signals, and a combining means for combining the first and second distributing signals and outputting a combined signal. Receives the input signal and a first supervisory signal,
A third amplifier signal having a first phase relationship with the second monitor signal, the first amplifier outputting the first distribution signal together with the input signal, and the input signal and the first monitor signal. A second amplifier for outputting the second split signal including a fourth supervisory signal having a second phase relationship with the first and third supervisory signals together with the input signal,
Further, there is provided a failure detection circuit characterized in that it has means for detecting a failure in the first amplifier and the second amplifier based on the phase relationship between the combined signal and the second monitoring signal. ..

【0007】[0007]

【実施例】以下、図1を参照して本発明の実施例を説明
する。
Embodiments of the present invention will be described below with reference to FIG.

【0008】図1は本発明の一実施例を示すブロック図
である。
FIG. 1 is a block diagram showing an embodiment of the present invention.

【0009】監視信号発生器2より出力された監視信号
は、入力端子1より入力される入力信号と共にハイブリ
ッドリングによる電力分配器3を通して電力増幅器4お
よび4′に入力され、電力増幅器4および4′のそれぞ
れの出力端より、90°位相を異にして出力され、前記
互いに90°位相が異なる2つの監視信号はハイブリッ
ドリングによる電力合成器5に入力される。従って、前
記2つの監視信号は、電力合成器5のアイソレーション
ポートで逆相に位相合成されるため電力合成器5からは
出力されない。
The supervisory signal output from the supervisory signal generator 2 is input to the power amplifiers 4 and 4'through the power distributor 3 by the hybrid ring together with the input signal input from the input terminal 1, and the power amplifiers 4 and 4 '. From the respective output ends of the two, the two monitor signals which are different in phase by 90 ° and the two monitor signals which are different in phase by 90 ° are inputted to the power combiner 5 by the hybrid ring. Therefore, the two monitoring signals are not output from the power combiner 5 because the isolation ports of the power combiner 5 are combined in opposite phases.

【0010】又、電力増幅器4,4′のどちらか一方が
故障した場合には電力増幅器4,4′から出力される信
号は互いに打ち消し合うことはないので電力合成器5か
らは監視信号が出力される。
When either one of the power amplifiers 4 and 4'fails, the signals output from the power amplifiers 4 and 4'cannot cancel each other, so that the power combiner 5 outputs a monitor signal. To be done.

【0011】又、前記入力信号は、電力分配器3を通し
て電力増幅器4および4′に入力された後、電力合成器
5,電力合成器5´を経て負荷6に入力される。
The input signal is input to the power amplifiers 4 and 4'through the power distributor 3, and then to the load 6 via the power combiner 5 and the power combiner 5 '.

【0012】監視信号発生器2より位相調整器9に出力
されたもう一方の監視信号は、位相調整器9とレベル調
整器10を経て、ハイブリッドリングによる電力合成器
5′へ入力される。前記監視信号は、増幅器4,4´ど
ちらか一方が故障したときにハイブリッドリングによる
電力合成器5の出力に現れる監視信号に対して90°位
相を遅らせ、且つ信号レベルが等しく調整されてハイブ
リッドリングによる電力合成器5′へ入力される。
The other supervisory signal output from the supervisory signal generator 2 to the phase adjuster 9 is input to the power combiner 5'by the hybrid ring via the phase adjuster 9 and the level adjuster 10. The supervisory signal delays the phase by 90 ° with respect to the supervisory signal appearing at the output of the power combiner 5 by the hybrid ring when either one of the amplifiers 4 and 4'fails, and the signal level is adjusted to be equal, and the hybrid ring is adjusted. Is input to the power combiner 5 '.

【0013】即ち、電力増幅器4,4´および監視信号
発生器2に故障がなければ電力増幅器4,4′を経た監
視信号は互いに相殺されるので、ハイブリッドリングに
よる電力合成器5からは出力されない。従って、ハイブ
リッドリングによる電力合成器5′に接続された検出器
8にはレベル調整器10より出力された監視信号だけが
出力されている。
That is, if there is no failure in the power amplifiers 4 and 4'and the supervisory signal generator 2, the supervisory signals that have passed through the power amplifiers 4 and 4'are canceled by each other and are not output from the power combiner 5 by the hybrid ring. .. Therefore, only the supervisory signal output from the level adjuster 10 is output to the detector 8 connected to the power combiner 5'by the hybrid ring.

【0014】電力増幅器4に故障が発生し、電力増幅器
4,4′により構成されている増幅器の利得が低下する
と、ハイブリッドリングによる電力合成器5の出力には
監視信号が現れる。この監視信号のレベルとレベル調整
器10より出力される監視信号のレベルとの和がハイブ
リッドリングによる電力合成器5′より出力される。
When a failure occurs in the power amplifier 4 and the gain of the amplifier composed of the power amplifiers 4 and 4'decreases, a monitor signal appears at the output of the power combiner 5 by the hybrid ring. The sum of the level of this supervisory signal and the level of the supervisory signal output from the level adjuster 10 is output from the power combiner 5'by the hybrid ring.

【0015】従って、検出器8により検出される監視信
号のレベルは故障のない場合に対して増加する。
Therefore, the level of the supervisory signal detected by the detector 8 is increased relative to the case without failure.

【0016】電力増幅器4′に故障が発生し、前記増幅
部の利得が低下するとハイブリッドリングによる電力合
成器5の出力には監視信号が現れる。この監視信号は、
電力増幅器4の故障のとき現れる監視信号とは位相を1
80°異にしている。即ち、この監視信号のレベルとレ
ベル調整器10より出力された監視信号との差がハイブ
リッドリングによる電力合成器5′より出力される。
When a failure occurs in the power amplifier 4'and the gain of the amplifying section decreases, a monitor signal appears at the output of the power combiner 5 by the hybrid ring. This supervisory signal is
The phase of the supervisory signal that appears when the power amplifier 4 fails is 1
80 degrees different. That is, the difference between the level of this monitor signal and the monitor signal output from the level adjuster 10 is output from the power combiner 5'by the hybrid ring.

【0017】従って、検出器8により検出される監視信
号のレベルは故障のない場合に対して減少する。
Therefore, the level of the supervisory signal detected by the detector 8 is reduced compared to the case without failure.

【0018】尚、電力増幅器4が故障した場合、電力合
成器5の出力端に発生する監視信号のレベルとレベル調
整器10より出力される監視信号のレベルとの和を電力
合成器5′から出力させても良い。その場合、検出器8
により検出される監視信号のレベルは故障のない場合に
対して減少する。
When the power amplifier 4 fails, the sum of the level of the monitor signal generated at the output terminal of the power combiner 5 and the level of the monitor signal output from the level adjuster 10 is output from the power combiner 5 '. You may output it. In that case, the detector 8
The level of the supervisory signal detected by is reduced compared to the case without failure.

【0019】又、電力増幅器4´が故障した場合、電力
合成器5の出力端に発生する監視信号のレベルとレベル
調整器10より出力される監視信号のレベルとの差を電
力合成器5′から出力させても良い。その場合、検出器
8により検出される監視信号のレベルは故障のない場合
に対して増加する。
When the power amplifier 4'fails, the difference between the level of the supervisory signal generated at the output terminal of the power combiner 5 and the level of the supervisory signal output from the level adjuster 10 is determined by the power combiner 5 '. May be output from. In that case, the level of the supervisory signal detected by the detector 8 is increased relative to the case without failure.

【0020】[0020]

【発明の効果】以上説明したように、本発明によれば、
2つの増幅器のどちらかに故障が発生した場合に、前記
2つの増幅器のどちらの利得の低下による監視信号のレ
ベル低下であるのか区別がつけられ、本来正常に動作し
ている方の増幅器における故障の誤検出を防止できる。
As described above, according to the present invention,
When a failure occurs in either of the two amplifiers, it is possible to distinguish which of the two amplifiers causes the decrease in the gain of the supervisory signal, and the failure in the amplifier that is normally operating normally. The false detection of can be prevented.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.

【図2】従来の故障検出回路を示すブロック図である。FIG. 2 is a block diagram showing a conventional failure detection circuit.

【符号の説明】[Explanation of symbols]

1 入力端子 2,12 監視信号発生器 3,13 電力分配器 4,4′,14,14´ 電力増幅器 5,5′,15 電力合成器 6,16 負荷 8,18 検出器 9 位相調整器 10 レベル調整器 1 Input Terminals 2,12 Supervisory Signal Generator 3,13 Power Divider 4,4 ', 14,14' Power Amplifier 5,5 ', 15 Power Combiner 6,16 Load 8,18 Detector 9 Phase Adjuster 10 Level adjuster

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 第1の監視信号と該第1の監視信号とは
位相の異なる第2の監視信号を出力する監視信号発生手
段と、入力信号及び前記第1の監視信号を受け、第1及
び第2の分配信号を出力する分配手段と、前記第1及び
第2の分配信号を合成して合成信号を出力する合成手段
とを備え、前記分配手段は、前記入力信号及び第1の監
視信号を受け、該第1の監視信号に対して第1の位相関
係を有する第3の監視信号を前記入力信号と共に含む前
記第1の分配信号を出力する第1の増幅器と、前記入力
信号及び第1の監視信号を受け、第1及び第3の監視信
号に対して第2の位相関係を有する第4の監視信号を前
記入力信号と共に含む前記第2の分配信号を出力する第
2の増幅器とを備え、さらに前記合成信号と第2の監視
信号との間の位相関係から、前記第1の増幅器及び第2
の増幅器における故障を検出する手段を有していること
を特徴とする故障検出回路。
1. A monitor signal generating means for outputting a first monitor signal and a second monitor signal having a phase different from that of the first monitor signal, and an input signal and the first monitor signal for receiving a first monitor signal. And a distribution means for outputting the second distribution signal, and a combining means for combining the first and second distribution signals and outputting a combined signal, the distributing means comprising the input signal and the first monitor. A first amplifier for receiving the signal and outputting the first distribution signal including a third supervisory signal having a first phase relationship with the first supervisory signal together with the input signal; A second amplifier which receives the first supervisory signal and outputs the second distribution signal including the fourth supervisory signal having a second phase relationship with the first and third supervisory signals together with the input signal. And further, a correlation between the composite signal and the second supervisory signal. The first amplifier and the second amplifier
Failure detection circuit having means for detecting a failure in the amplifier of.
JP3252518A 1991-09-30 1991-09-30 Failure detecting circuit Withdrawn JPH0590845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3252518A JPH0590845A (en) 1991-09-30 1991-09-30 Failure detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3252518A JPH0590845A (en) 1991-09-30 1991-09-30 Failure detecting circuit

Publications (1)

Publication Number Publication Date
JPH0590845A true JPH0590845A (en) 1993-04-09

Family

ID=17238488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3252518A Withdrawn JPH0590845A (en) 1991-09-30 1991-09-30 Failure detecting circuit

Country Status (1)

Country Link
JP (1) JPH0590845A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5575672A (en) * 1993-12-17 1996-11-19 Sumitomo Wiring Systems, Ltd. Lever connector with concave-convex engagement mechanism for holding a locking lever at a lock position
US7255581B2 (en) 2005-06-08 2007-08-14 Sumitomo Wiring Systems, Ltd. Lever-type connector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5575672A (en) * 1993-12-17 1996-11-19 Sumitomo Wiring Systems, Ltd. Lever connector with concave-convex engagement mechanism for holding a locking lever at a lock position
US7255581B2 (en) 2005-06-08 2007-08-14 Sumitomo Wiring Systems, Ltd. Lever-type connector

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Effective date: 19981203