JPS5838036A - Level detecting system - Google Patents

Level detecting system

Info

Publication number
JPS5838036A
JPS5838036A JP56135993A JP13599381A JPS5838036A JP S5838036 A JPS5838036 A JP S5838036A JP 56135993 A JP56135993 A JP 56135993A JP 13599381 A JP13599381 A JP 13599381A JP S5838036 A JPS5838036 A JP S5838036A
Authority
JP
Japan
Prior art keywords
circuit
output
control circuit
rectangular
level detection
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
Application number
JP56135993A
Other languages
Japanese (ja)
Inventor
Hayashi Suzuki
鈴木 林
Yoshinori Nakamura
中村 善律
Yoshihiko Taniguchi
谷口 良彦
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56135993A priority Critical patent/JPS5838036A/en
Publication of JPS5838036A publication Critical patent/JPS5838036A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00Automatic control of frequency or phase; Synchronisation
    • H03L7/06Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08Details of the phase-locked loop

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To interrupt an output before characteristics of an output from a control system is deteriorated, by supplying the output to an automatic frequency control circuit or automatic phase control circuit, and a level detection circuit from different rectangular converting circuits from gains. CONSTITUTION:Rectangular converting circuit 1, 5 convert an input sinusoidal wave into a rectangular wave respectively and input the result to an automatic frequency control circuit or automatic phase control circuit 2, and a level detection circuit 3. The circuits 1 and 5 have the same threshold value converting the sinusoidal wave into the rectangular wave and the gain of the circuit 5 is taken lower than that of the circuit 1. Thus, before the characteristics of the output of the circuit 2 are completely deteriorated, the circuit 3 gives an output, controls an output intrruption circuit 4 and interrupts the output from the circuit 2. Thus, the deteriorated output such as increase in noise can be prevented.

Description

【発明の詳細な説明】 本発明は入力レベル低下を検出して出力を断にする制御
系において、出力における特性、が劣化する以前に出力
を断にすることができるレベル検出方式に関するもので
ある。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a level detection method that can turn off the output before the output characteristics deteriorate in a control system that detects a drop in input level and turns off the output. .

搬送装置尋においては、例えば各種の搬送波信号やパイ
ロット信号E得る目的で、一定の入力信号を分局等して
特定の周波数の信号を発生する自動周波数制御回路や、
一定の入力信号を特定の位相に制御して出力する自動位
相制御回路が用いられている。
The carrier device includes an automatic frequency control circuit that divides a certain input signal to generate a signal of a specific frequency, for example, in order to obtain various carrier wave signals and pilot signals.
An automatic phase control circuit is used that controls a constant input signal to a specific phase and outputs the signal.

これらの制御回路においては、一般に入力信号のレベル
が低下するに伴って、出力における特性が徐々に劣化す
る。自動周波数制御回路や自動位相制御回路の場合は、
入力レベルの低下に伴って出力雑音が増加する。このた
め、入力信号レベルを検出する回路を設けて、入力信号
レベルが異常の場合、出力を断にするように制御するこ
とが行われておシ、これによって予備系と切替えて正常
な出力を得る仁とができる。
In these control circuits, the characteristics at the output generally deteriorate gradually as the level of the input signal decreases. For automatic frequency control circuits and automatic phase control circuits,
Output noise increases as input level decreases. For this reason, a circuit is installed to detect the input signal level, and when the input signal level is abnormal, the output is controlled to be cut off. You can gain and gain.

第1図は自動周波数制御系または自動位相制御系におけ
る従来のレベル検出方式を示している。
FIG. 1 shows a conventional level detection method in an automatic frequency control system or an automatic phase control system.

何回−において、1は矩形変換回路であって入力正弦波
を矩形波に変換して出力する。2は自動周波数制御回路
または自動位相制御回路であって、入力矩形波から自動
的に周波数または位相が制御された正弦波の出力を発生
する。3はレベル検出回路であって、矩形変換回路1の
出力矩形波レベルを検出して一定レベル以下になったと
き出力を発生する。4は出力断回路であって、通常は自
動周波数制御回路tたは自動位相制御回路2の出力正弦
波を通過させるが、レベル検出回路3の出力が発生し九
ときは遮断する。
1 is a rectangular conversion circuit which converts an input sine wave into a rectangular wave and outputs it. Reference numeral 2 denotes an automatic frequency control circuit or an automatic phase control circuit, which generates a sine wave output whose frequency or phase is automatically controlled from an input rectangular wave. 3 is a level detection circuit which detects the output rectangular wave level of the rectangular conversion circuit 1 and generates an output when the level falls below a certain level. Reference numeral 4 indicates an output cutoff circuit, which normally passes the output sine wave of the automatic frequency control circuit t or the automatic phase control circuit 2, but is cut off when the output of the level detection circuit 3 is generated.

このように自動周波数制御系または自動位相制御系にお
いては、入力正弦波を矩形波に変換して自動周波数制御
回路ま九は自動位相制御回路に加えて所要の出力を得る
。この際矩形波出力のレベルを検出して、そのレベルが
異常のとき出力を断にする制御を行うが、レベル検出回
路3が出力を発生する以前に、特性が低下した出力、例
えば雑音が増加した出力が送出される領域が存在する。
In this way, in an automatic frequency control system or an automatic phase control system, an input sine wave is converted into a rectangular wave, and the automatic frequency control circuit or the automatic frequency control circuit obtains a required output in addition to the automatic phase control circuit. At this time, the level of the rectangular wave output is detected and control is performed to turn off the output when the level is abnormal, but before the level detection circuit 3 generates an output, the output whose characteristics have deteriorated, for example, noise has increased. There is an area where the output is sent.

本発明は、このような従来技術の欠点を除去しようとす
るものであって、その目的は、入力レベルの低下によっ
て制御系からの出力の特性が劣化提供することにある。
The present invention aims to eliminate such drawbacks of the prior art, and its purpose is to provide a control system whose output characteristics deteriorate due to a decrease in input level.

本発明のレベル検出方式は、自動周波数制御回路または
自動位相制御回路に出方を供給する矩形変換回路と、レ
ベル検出回路に出方を供給する矩形変換回路とを別個に
設けて、それぞれの矩形変換回路の利得を異ならしめる
ことKよって、自動周波数制御回路または自動位相制御
回路の出力の特性が劣化する以前にこれを断にすること
ができるようにしたものである。
In the level detection method of the present invention, a rectangular conversion circuit that supplies output to the automatic frequency control circuit or automatic phase control circuit, and a rectangle conversion circuit that supplies output to the level detection circuit are separately provided, and each rectangular By making the gains of the conversion circuits different, it is possible to turn off the automatic frequency control circuit or the automatic phase control circuit before the output characteristics thereof deteriorate.

以下、実施例について本発明の詳細な説明する。Hereinafter, the present invention will be described in detail with reference to Examples.

第2図は本発明のレベル検出方式の一実施例の構成を示
している。同図において第1図におけると同じ部分は同
じ番号で示されておシ、5は矩形変換回路である。
FIG. 2 shows the configuration of an embodiment of the level detection method of the present invention. In this figure, the same parts as in FIG. 1 are designated by the same numbers, and 5 is a rectangular conversion circuit.

第2図において、矩形変換回路1、自動周波数制御回路
または自動位相制御回路2および出力断回路4の構成は
第1図の場合と同様である。矩形変換回路5は入力正弦
波を矩形波に変換してレベル検出回路3に供給し、レベ
ル検出回路5は入力矩形波のレベルを検出して一定しベ
ゝル以下になったとき出力を発生する。出力断回路4は
レベル検出回路3の出力に応じて、自動周波数制御回路
または自動位相制御回路2の出力を通過させ、または遮
断することによって所!の制御を行う。
In FIG. 2, the configurations of the rectangular conversion circuit 1, automatic frequency control circuit or automatic phase control circuit 2, and output cutoff circuit 4 are the same as in the case of FIG. The rectangular conversion circuit 5 converts the input sine wave into a rectangular wave and supplies it to the level detection circuit 3, and the level detection circuit 5 detects the level of the input rectangular wave and generates an output when the level becomes constant and becomes below the veil. do. The output cutoff circuit 4 is configured by passing or cutting off the output of the automatic frequency control circuit or the automatic phase control circuit 2, depending on the output of the level detection circuit 3. control.

矩形変換回路1と矩形変換回路5とは、正弦波を矩形波
に変換する際のしきい値は同一でおるが、利得が異なっ
ている。従って例えば矩形変換回路5の利得を矩形変換
回路1よりも低くしておくことによって、自動周波数制
御回路または自動位相、制御回路2の出力の特性が完全
に劣化する前にレベル検出回路6が出力を発生して、出
力断回路4において出力を遮断するので、特性の劣化し
た出力°O発生を防止することができる。
The rectangular conversion circuit 1 and the rectangular conversion circuit 5 have the same threshold value when converting a sine wave into a rectangular wave, but have different gains. Therefore, for example, by setting the gain of the rectangular conversion circuit 5 lower than that of the rectangular conversion circuit 1, the level detection circuit 6 can output the output before the characteristics of the output of the automatic frequency control circuit or the automatic phase control circuit 2 completely deteriorate. is generated, and the output is cut off in the output cutoff circuit 4, so that it is possible to prevent the output °O with deteriorated characteristics from occurring.

第6図は本発明のレベル検出方式の他の実施例の構成を
示している。同図において、第2図にお妙ると同じ部分
は同じ番号で示されておシ、6は減衰器である。
FIG. 6 shows the structure of another embodiment of the level detection method of the present invention. In this figure, the same parts as in FIG. 2 are designated by the same numbers, and 6 is an attenuator.

第5flAの場合、入力信号は減衰器6を経て一定の減
衰を受けたのち、矩形変換回路5に入力され、矩形変換
回路5の出力がレベル検出回路3に加えられるように構
成されている。この場合も矩形変換回路1,5のそれぞ
れの利得および減衰器6の減衰量を適当に設定すること
によって、第2図の実施例の場合と同じ効果を得ること
ができる。
In the case of the fifth flA, the input signal is subjected to a certain attenuation through the attenuator 6 and then input to the rectangular conversion circuit 5, and the output of the rectangular conversion circuit 5 is applied to the level detection circuit 3. In this case as well, by appropriately setting the respective gains of the rectangular conversion circuits 1 and 5 and the amount of attenuation of the attenuator 6, the same effect as in the embodiment shown in FIG. 2 can be obtained.

以上説明したように本発明のレベル検出方式によれば、
自動周波数制御回路または自動位相制御回路に矩形波を
供給する矩形変換回路と、レベル検出回路に入力を供給
する矩形変換回路とを別個に設け、両足形変換回路の利
得を異ならしめることによって、入カビベルの低下によ
って自動周波数制御回路または自動位相制御回路の出力
の特性が劣化する以前に、出力を断にすることができる
ので、甚だ効果的である。
As explained above, according to the level detection method of the present invention,
By separately providing a rectangular conversion circuit that supplies a rectangular wave to the automatic frequency control circuit or automatic phase control circuit and a rectangular conversion circuit that supplies input to the level detection circuit, and making the gains of the two-legged conversion circuits different, the input This is extremely effective because the output can be cut off before the output characteristics of the automatic frequency control circuit or the automatic phase control circuit deteriorate due to a decrease in mold level.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のレベル検出方式の構成を示すブロック図
、第2図および第3図はそれぞれ本発明のレベル検出方
式の一実施例の構成を示すブロック図である。 1.5・−矩形変換回路、2・・・自動周波数制御回路
または自動位相制御回路、6・・・レベル検出回路、4
・・・出力断回路、6・・・減衰器。 特許出願人 富士通株式会社 代理人弁理士玉蟲久五部(外3名)
FIG. 1 is a block diagram showing the structure of a conventional level detection method, and FIGS. 2 and 3 are block diagrams showing the structure of an embodiment of the level detection method of the present invention. 1.5 - rectangular conversion circuit, 2... automatic frequency control circuit or automatic phase control circuit, 6... level detection circuit, 4
...output disconnection, 6...attenuator. Patent applicant Gobe Tamamushi, patent attorney representing Fujitsu Ltd. (3 others)

Claims (1)

【特許請求の範囲】[Claims] 入力正弦波を矩形変換回路を経て矩形波に変換し工自動
周波数制御回路または自動位相制御回路に供給して所要
の出力を得るとともにレベル検出回路によって矩形波入
力のレベルを検出して一定レベル以下に低下したとき前
記自動位相制御回路または自動位相制御回路の出力を断
にする制御系において、入力信号を矩形波に変換する第
2の矩形変換回路を具え、該第2の矩形変換回路の出力
を前記レベル検出回路の入力として供給するとともに該
第2の矩形変換回路の利得を前記矩形変、換口癖の利得
−と異ならしめ九ことを特徴とするレベル検出方式。
The input sine wave is converted into a rectangular wave through a rectangular conversion circuit, and then supplied to an automatic frequency control circuit or an automatic phase control circuit to obtain the required output, and a level detection circuit detects the level of the rectangular wave input to keep it below a certain level. The automatic phase control circuit or the control system that turns off the output of the automatic phase control circuit when the voltage decreases to is supplied as an input to the level detection circuit, and the gain of the second rectangular conversion circuit is made to be different from the gain of the rectangular conversion circuit.
JP56135993A 1981-08-29 1981-08-29 Level detecting system Pending JPS5838036A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56135993A JPS5838036A (en) 1981-08-29 1981-08-29 Level detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56135993A JPS5838036A (en) 1981-08-29 1981-08-29 Level detecting system

Publications (1)

Publication Number Publication Date
JPS5838036A true JPS5838036A (en) 1983-03-05

Family

ID=15164682

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56135993A Pending JPS5838036A (en) 1981-08-29 1981-08-29 Level detecting system

Country Status (1)

Country Link
JP (1) JPS5838036A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10907681B2 (en) 2018-03-09 2021-02-02 Mitsubishi Heavy Industries, Ltd. Pad bearing and rotary machine
US11920631B2 (en) 2019-07-08 2024-03-05 Miba Industrial Bearings Germany Osterode Gmbh Hydrodynamic slide bearing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4966194A (en) * 1972-09-05 1974-06-26
JPS5039591A (en) * 1973-08-13 1975-04-11

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4966194A (en) * 1972-09-05 1974-06-26
JPS5039591A (en) * 1973-08-13 1975-04-11

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10907681B2 (en) 2018-03-09 2021-02-02 Mitsubishi Heavy Industries, Ltd. Pad bearing and rotary machine
US11920631B2 (en) 2019-07-08 2024-03-05 Miba Industrial Bearings Germany Osterode Gmbh Hydrodynamic slide bearing

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