JPS6150410A - Booster for home common listening - Google Patents

Booster for home common listening

Info

Publication number
JPS6150410A
JPS6150410A JP17264784A JP17264784A JPS6150410A JP S6150410 A JPS6150410 A JP S6150410A JP 17264784 A JP17264784 A JP 17264784A JP 17264784 A JP17264784 A JP 17264784A JP S6150410 A JPS6150410 A JP S6150410A
Authority
JP
Japan
Prior art keywords
booster
circuit
variable attenuator
branch
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.)
Pending
Application number
JP17264784A
Other languages
Japanese (ja)
Inventor
Keiichi Mizuguchi
水口 慶一
Yoshihiro Tanigawa
嘉浩 谷川
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP17264784A priority Critical patent/JPS6150410A/en
Publication of JPS6150410A publication Critical patent/JPS6150410A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03GCONTROL OF AMPLIFICATION
    • H03G3/00Gain control in amplifiers or frequency changers without distortion of the input signal

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To set the attenuation by one man by providing a variable attenuator circuit setting the attenuation depending on branch number so as to eliminate two men's work at a remote location. CONSTITUTION:A booster consists of a high frequency amplifier circuit 1, a branch circuit 2 and a variable attenuator circuit 3 and the high frequency amplifier circuit 1 incorporates a gain adjuster 7. After the variable attenuator circuit 3 is set up depending on the number of branches, a level meter is connected to a monitor terminal 6 to adjust the gain adjuster so as to obtain a prescribed level or over.

Description

【発明の詳細な説明】 〔技術分野〕 この発明は、ホーム共聴用システムにおけるブースタの
ゲイン811a法に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a booster gain 811a method in a home public listening system.

〔背景技術〕[Background technology]

従来、ホーム共聴用ブースタにおりでは、ブースタ出力
をモニターするモニター端子は、コスト等の面から、除
去されている場合が、大部分であり、モニター端子を有
するブースタにおいても、そのモニター端子の役割は里
に、ブースタ出力のレベルチェックに留まっているのが
現状である。
Conventionally, in most home public listening boosters, the monitor terminal for monitoring the booster output has been removed due to cost reasons, and even in boosters that have a monitor terminal, the monitor terminal for monitoring the booster output has been removed. Currently, its role is limited to checking the level of booster output.

よって、ブースタのゲイン調整の多くは、テレビ受像機
での映像を実際に眼で確認する事によりなされているの
が現状である。
Therefore, most booster gain adjustments are currently made by actually visually checking the image on a television receiver.

〔発明の目的〕[Purpose of the invention]

この発明は、ホーム共聴用ブースタにおいて、ゲイン調
整の簡素化を目的とするものである。
The present invention aims to simplify gain adjustment in a home public listening booster.

〔発明の開示〕[Disclosure of the invention]

以下この発明を一実施例として示した第1図乃至第3図
に基づいて説明する。ブースタのブロックダイヤグラム
は、第1図に示す如く、ブースタは高周波増幅回路1と
分岐回路2と可変アッテネータ回路3より構成されてお
り、高周波増幅回路1はゲイン調整器7を内蔵している
。又、該ブースタは、入力端子4、出力端子5.モニタ
ー端子6を有している。
The present invention will be explained below based on FIGS. 1 to 3, which are shown as one embodiment. As shown in the block diagram of the booster in FIG. 1, the booster is composed of a high frequency amplifier circuit 1, a branch circuit 2, and a variable attenuator circuit 3, and the high frequency amplifier circuit 1 has a gain adjuster 7 built therein. The booster also has an input terminal 4, an output terminal 5. It has a monitor terminal 6.

ところで、アンテナからのテレビ信号は、入力端子4か
らブースタに注入され、高周波増幅回路1により、所定
の出力レベvtで、増幅されることとなる。そして、出
力レペVの調整は、ゲイン調整器7によりなされる事と
なる。
By the way, the television signal from the antenna is injected into the booster from the input terminal 4, and is amplified by the high frequency amplification circuit 1 at a predetermined output level vt. Then, the output ratio V is adjusted by the gain adjuster 7.

高周波増幅回路1の出力は1分岐回路2を経て出力端子
5に伝達される6分岐回路2の挿入損失は非常に小さく
%実用上、高周波増幅回路1の出力値が出力端子5に伝
達されるものと考えて差しつかえな−6但し、分岐回路
2により高周波増幅回路1の出力の一部は、可変アッテ
ネータ回路3を経て、モニター端子6まで、伝達される
事となる0分岐回路2の回路の具体例は第2図に示す如
きものである。この回路は、入力端子aと出力端子すの
間の損失は前記した如く、非常に小さく入力端子りと分
岐端子Cの間の損失は、適宜な値(例えば4l−to[
dB])に設定する事ができる。
The output of the high-frequency amplifier circuit 1 is transmitted to the output terminal 5 via the 1-branch circuit 2.The insertion loss of the 6-branch circuit 2 is very small.In practice, the output value of the high-frequency amplifier circuit 1 is transmitted to the output terminal 5. However, a part of the output of the high frequency amplifier circuit 1 is transmitted to the monitor terminal 6 via the variable attenuator circuit 3 by the branch circuit 2. A specific example of this is shown in FIG. In this circuit, the loss between the input terminal a and the output terminal A is very small as described above, and the loss between the input terminal A and the branch terminal C is set to an appropriate value (for example, 4l-to[
dB]).

よって1分岐回路2の分岐端子出力は、高周波増幅回路
1の出力レベVより一定値を減じた値と1   ヶ、。
Therefore, the branch terminal output of the 1-branch circuit 2 is equal to the value obtained by subtracting a certain value from the output level V of the high-frequency amplifier circuit 1.

可変アッテネータ3は1種々な減衰値を設定することが
できるアッテネータで、第3図に実施例を示す、この図
においては、スイッチSW1.SW2による切替力゛式
にて4種類の減衰値を得る様に構成されている。もちろ
ん可変アッテネータ回路3は1本図に限定されるもので
はない。該可変アッテネータ回路8の減衰量は1分岐回
路2の減衰量と加算されることになり、モニター端子6
の出力は、各減衰量に応じて4種類の値を持つ事となる
The variable attenuator 3 is an attenuator that can set various attenuation values, and an embodiment thereof is shown in FIG. 3. In this figure, the switches SW1. It is configured to obtain four types of attenuation values using a switching force formula using SW2. Of course, the variable attenuator circuit 3 is not limited to one shown. The attenuation amount of the variable attenuator circuit 8 is added to the attenuation amount of the first branch circuit 2, and the monitor terminal 6
The output has four types of values depending on the amount of attenuation.

この4種類の減衰量は、実際のテレビ信号の分岐端子数
に合わせて設定することができる。例えば、分岐端子数
が2個以下の場合は、ATT−1、分岐端子数が3個以
上4個以下の場合は、ATT−2、分岐端子数が5個以
上8個以下の場合は、ATT−3、分岐端子数が9個以
上比個以下の場合は、ATT−4と設定する如きである
。もちろん、分岐端子数の個数に応じて、標準の分岐0
分配方式とケーブル長を決定しておくことが必要である
。上記の条件において、各ATT−1〜ATT−4・4
は、最悪値を設定する様に、減衰量を定めておくものと
する。
These four types of attenuation amounts can be set according to the actual number of branch terminals of the television signal. For example, if the number of branch terminals is 2 or less, ATT-1, if the number of branch terminals is 3 or more and 4 or less, ATT-2, and if the number of branch terminals is 5 or more and 8 or less, ATT -3, when the number of branch terminals is 9 or more and less than 9, it is set as ATT-4. Of course, depending on the number of branch terminals, standard branch 0
It is necessary to decide on the distribution method and cable length. Under the above conditions, each ATT-1 to ATT-4/4
The attenuation amount shall be determined so as to set the worst value.

この様に、モニター端子6の出力レベルを分M個数に応
じて%設定できるブースタが本発明ブースタである。こ
の本発明ブースタによれば、テレビ信号の分岐個数に応
じて、モニター端子の出力VべVを変える事ができるの
で分岐個数に応じて可変アッテネータ回路3を設定した
後、このモニター端子6にVべVメータを接続して、一
定のレベV以上になる様にゲイン調整器7を調整すれば
テレビ映倫としては、全く問題が無い。また、レベVメ
ータの代用として、小型のモニターテレビを使用しても
さしつかえない。
In this way, the booster of the present invention is capable of setting the output level of the monitor terminal 6 by a percentage according to the number of M terminals. According to the booster of the present invention, the output V and V of the monitor terminal can be changed according to the number of branches of the television signal, so after setting the variable attenuator circuit 3 according to the number of branches, the V If you connect a V meter and adjust the gain adjuster 7 so that the level V is above a certain level, there will be no problem at all with TV Eirin. Also, a small monitor television may be used as a substitute for the level V meter.

〔発明の効果〕〔Effect of the invention〕

本発明のブースタは1以上説明した如く、分岐個数さえ
わかればブースタ出力の設定(ゲイン調整)が、ブース
タのある場所で、簡単にできるので従来の様に離れた所
で2人が作業をする必要は無く、1人作業で短時間で設
定できる効果がある。
As explained above, with the booster of the present invention, as long as the number of branches is known, the booster output setting (gain adjustment) can be easily done at the location where the booster is located, so two people do not need to work at a separate location as in the past. There is no need for this, and it has the effect of allowing one person to set it up in a short time.

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

第1図乃至第3図はこの発明の一実施例を示し、第1図
はブースタ回路のブロック、ダイヤグラム。第2図は、
分岐回路の回路図。第3図は、可変アッテネータ回路の
回路図である。 1・・・高周波増幅回路、2・・・分岐回路%3・・・
可変アッテネータ回路、4・・・入力端子、5・・・出
力端子。 6・・・モニター端子、フ・・・ゲイン調整器、a・・
・入力端子、b・・・出力端子、C・・・分岐端子。
1 to 3 show an embodiment of the present invention, and FIG. 1 is a block diagram of a booster circuit. Figure 2 shows
Schematic diagram of a branch circuit. FIG. 3 is a circuit diagram of a variable attenuator circuit. 1...High frequency amplification circuit, 2...Branch circuit%3...
Variable attenuator circuit, 4...input terminal, 5...output terminal. 6...Monitor terminal, f...gain adjuster, a...
・Input terminal, b...output terminal, C...branch terminal.

Claims (2)

【特許請求の範囲】[Claims] (1)下記の構成要件を備えることを特徴とするホーム
共聴用ブースタ。 a、ブースタ出力をモニターする端子。 b、このモニター端子の出力レベルを適宜設定可能とし
た可変アッテネータ回路。
(1) A home public listening booster characterized by having the following configuration requirements. a. Terminal to monitor booster output. b. A variable attenuator circuit that allows the output level of this monitor terminal to be set appropriately.
(2)モニター端子の出力レベルの種類は、テレビ共聴
方式における分岐個数に基いて設定した可変アッテネー
タ回路とした特許請求の範囲第1項記載のホーム共聴用
ブースタ。
(2) The booster for home public viewing according to claim 1, wherein the type of output level of the monitor terminal is a variable attenuator circuit set based on the number of branches in the television public viewing system.
JP17264784A 1984-08-20 1984-08-20 Booster for home common listening Pending JPS6150410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17264784A JPS6150410A (en) 1984-08-20 1984-08-20 Booster for home common listening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17264784A JPS6150410A (en) 1984-08-20 1984-08-20 Booster for home common listening

Publications (1)

Publication Number Publication Date
JPS6150410A true JPS6150410A (en) 1986-03-12

Family

ID=15945759

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17264784A Pending JPS6150410A (en) 1984-08-20 1984-08-20 Booster for home common listening

Country Status (1)

Country Link
JP (1) JPS6150410A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013519277A (en) * 2010-02-04 2013-05-23 エプコス アクチエンゲゼルシャフト Amplifier circuit and method for signal sensing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013519277A (en) * 2010-02-04 2013-05-23 エプコス アクチエンゲゼルシャフト Amplifier circuit and method for signal sensing
US8629719B2 (en) 2010-02-04 2014-01-14 Epcos Ag Amplifier circuit and method for signal sensing

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