JP2007081975A - Television receiving amplifier, and television reception system - Google Patents

Television receiving amplifier, and television reception system Download PDF

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JP2007081975A
JP2007081975A JP2005268751A JP2005268751A JP2007081975A JP 2007081975 A JP2007081975 A JP 2007081975A JP 2005268751 A JP2005268751 A JP 2005268751A JP 2005268751 A JP2005268751 A JP 2005268751A JP 2007081975 A JP2007081975 A JP 2007081975A
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television
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Toshihiro Sugiura
敏博 杉浦
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Maspro Denkoh Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a television receiving amplifier capable of widening a dynamic range in a way of coping with a sudden change in an input level. <P>SOLUTION: The television receiving amplifier includes at least a mixer for mixing television signals outputted from a plurality of television signal receiving paths each comprising a detection circuit for detecting a television signal received by an antenna, a first signal attenuation circuit for attenuating the television signal, and a control circuit for controlling the attenuation of the first signal attenuation circuits into a signal on one transmission line; a signal processor that compares/discriminates the detection signals outputted from the respective detection circuits, and controls the attenuation of the first signal attenuation circuits so that the signal outputted from the mixer is a television signal from a desired antenna; and a terminal side amplifier for amplifying the television signal outputted from the mixer. The signal processor minimizes the attenuation of the first signal attenuation circuit of the television signal reception path whose reception level of the television signal received by the antenna is a maximum, and maximizes the attenuation of the first signal attenuation circuits respectively interposed in the remaining television signal reception paths. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は，主にテレビ放送受信用に利用されるテレビ受信用増幅装置に関し，詳しくは主に地上ディジタル放送受信する移動体に利用される増幅部の回路，及び，これを用いた受信システムに関する。
TECHNICAL FIELD The present invention relates to a television receiving amplifying apparatus mainly used for receiving a television broadcast, and more particularly to a circuit of an amplifying unit mainly used for a mobile body receiving digital terrestrial broadcasting and a receiving system using the same. .

従来からテレビ受信用増幅装置はテレビ放送用のアンテナの近傍に取付けられて使用するものや，テレビ等の端末側装置の近傍に取付けられるものがあった。アンテナの近傍に取付けて使用するものは，テレビの画像を見ながら利得調整等の作業をする事が必要となるために，工事者一人での取付工事には無理があり，作業効率が著しく悪いものであった。一方テレビ等の端末側装置の近傍に取付けるものは，アンテナと増幅装置との間に介設した同軸ケーブルの伝送損失によって，増幅装置への入力レベルが低下し，Ｃ／Ｎが劣化してしまうといった問題があった。
そこで，このような問題点を解決するために，増幅装置をアンテナ近傍に設置する第１の増幅装置と端末側装置の近傍に設置する第２の増幅装置とに分けたものが提案されおり，テレビアンテナで受信された信号は，同軸ケーブルを介して第１の増幅装置に入力される。入力された信号は切換手段によって，第１の増幅器若しくは減衰器が選択されてから，電源分離フィルタを通過後に第１の増幅部から出力される。この切換手段は例えば高周波の信号経路を切換可能な高周波リレーによって構成されており，この信号経路の選択は第２の増幅装置に備えさせたスイッチによってよって行われる。
更に第２の増幅装置に備えさせた電源からは前記第１の増幅器及び前記第２の増幅装置に備えさせた第２の増幅器にも最適な電源が供給される。こうして第１の増幅装置において増幅された受信信号は，同軸ケーブルを介して前記第２の増幅装置に入力される。この入力信号は電源分離フィルタを通過後，可変減衰器で適宜利得調整されてから第２の増幅器で増幅された後に第２の増幅装置から出力され，テレビ受像機等に供給される。
従ってこの実施例では，テレビ受像機を見ながら利得調整ができるばかりでなく，スイッチの操作で増幅装置のダイナミックレンジを広げることができるので，電界強度が大きく異なる地域用に共通に使用できるテレビ受信用増幅装置が提供されている。
（例えば特許文献１参照）
Conventionally, a television receiving amplifying device is used by being attached in the vicinity of an antenna for television broadcasting, and a television receiving amplifying device is attached in the vicinity of a terminal side device such as a television. For equipment that is installed near the antenna, it is necessary to perform operations such as gain adjustment while watching TV images. It was a thing. On the other hand, what is attached in the vicinity of a terminal side device such as a television, the input level to the amplifying device is lowered and the C / N is deteriorated due to the transmission loss of the coaxial cable interposed between the antenna and the amplifying device. There was a problem.
Therefore, in order to solve such a problem, a device in which an amplifier is divided into a first amplifier installed near the antenna and a second amplifier installed near the terminal side device has been proposed. A signal received by the TV antenna is input to the first amplifying device via a coaxial cable. The input signal is output from the first amplifier after passing through the power supply separation filter after the switching means selects the first amplifier or attenuator. This switching means is constituted by, for example, a high-frequency relay capable of switching a high-frequency signal path, and this signal path is selected by a switch provided in the second amplifying device.
Further, an optimum power source is supplied from the power source provided in the second amplifying device to the first amplifier and the second amplifier provided in the second amplifying device. The reception signal amplified in the first amplifying device in this way is input to the second amplifying device via a coaxial cable. This input signal passes through the power supply separation filter, is appropriately gain-adjusted by a variable attenuator, is amplified by a second amplifier, is output from a second amplifier, and is supplied to a television receiver or the like.
Therefore, in this embodiment, not only can the gain be adjusted while watching the television receiver, but also the dynamic range of the amplifying device can be expanded by operating the switch. An amplifying device is provided.
(For example, see Patent Document 1)

特開平６−３２６５３４号公報JP-A-6-326534

ところで，ＵＨＦ帯で開始された地上ディジタル放送は，マルチパス（多重波伝送路）のように伝達経路の違いで到達時間に遅れが生じた電波に対しても，その遅れがガードインターバルの範囲内なら妨害を受けないし，レベル変動に対しても強く，電界強度が所定レベル以上有れば綺麗に受信できる，と言った特長を有し，移動体でも安定した受信ができるようになっている。
そこで，移動体にも従来例に示されるような第１の増幅装置と端末側装置の近傍に設置する第２の増幅装置とに分けダイナミックレンジを広くした増幅装置の装着が考えられる。即ちアンテナ近傍には第１の増幅装置を設置し，そこで増幅した信号を同軸ケーブルで移動体内に引き込むようにすれば，受信レベル低下させることなく端末側装置に信号を供給できるのである。
ところが，地上ディジタル放送は，上述のようにレベル変動には強いものの，電界強度が所定レベル以下になると急激に移らなくなる「がけ効果（Ｃｌｉｆｆ Ｅｆｆｅｃｔ）」を有することから，都市部などのように，ビルなどによって電波が遮られ電界強度が急激に変化したり，ビルなどの反射によるマルチパスが多かったりする地域において，更に安定した受信を行うには，例えば複数のアンテナを夫々異なる方向に向けて移動体に備えさせておけば，直接波であっても反射波（所定の時間内の遅延時間を有した遅延波）であっても，何れかのアンテナからの最もレベルの高い信号を受信できれば，受信できる確立が大きくなるのである。
しかしこのように複数のアンテナとテレビ信号受信経路を備えさせたことによって，受信レベルの低い信号経路からも何かしらの信号が端末側装置（例えば，地上ディジタル放送用チューナ）に入力されることから，これがＣ／Ｎの原因となり，結局，画像がフリーズしたり，受信画質が低下し最悪，映像断となったりしないようにしなければならないといった問題があった。
そこで本発明はこのような問題点を解決するためになされたものであり，
その目的は，移動体に適した地上ディジタル放送用のテレビ受信用増幅装置を提供することにある。
他の目的は，特に入力レベルのダイナミックレンジの広いテレビ受信用増幅装置を提供することにある。
他の目的は，常に最適な受信状態にあるテレビ信号を増幅可能なテレビ受信用増幅装置を提供する事にある。
他の目的は，常に最適な受信状態にあるテレビ信号を一定の出力レベルで出力することができるテレビ受信用増幅装置を提供する事にある。
他の目的は，例えば車などの移動体でテレビ受信を行うのに適したテレビ受信用増輻装置を提供する事にある。
他の目的は，例えば車などの移動体に配設が容易なテレビ受信用増輻装置及び受信システムを提供する事にある。
By the way, terrestrial digital broadcasting started in the UHF band is also within the guard interval range even for radio waves that are delayed in arrival time due to differences in transmission paths such as multipath (multiwave transmission path). If it is not disturbed, it is strong against level fluctuations, and can be clearly received if the electric field strength exceeds a predetermined level, so that even a mobile body can receive stably.
Therefore, it is conceivable to attach an amplifying device having a wide dynamic range by dividing the moving body into a first amplifying device and a second amplifying device installed in the vicinity of the terminal side device as shown in the conventional example. That is, if a first amplifying device is installed in the vicinity of the antenna and the amplified signal is drawn into the moving body with a coaxial cable, the signal can be supplied to the terminal side device without lowering the reception level.
However, terrestrial digital broadcasting has a “cliff effect” that does not move rapidly when the electric field strength falls below a predetermined level, although it is strong against level fluctuation as described above. To achieve more stable reception in areas where radio waves are blocked by buildings and the electric field strength changes rapidly, or where there are many multipaths due to reflections from buildings, for example, multiple antennas are pointed in different directions. If the mobile body is equipped, it can receive the signal with the highest level from either antenna, whether it is a direct wave or a reflected wave (a delayed wave having a delay time within a predetermined time). Therefore, the probability of receiving is increased.
However, by providing a plurality of antennas and a television signal reception path in this way, some signal is input to the terminal side device (for example, a terrestrial digital broadcast tuner) even from a signal path with a low reception level. This causes C / N, and eventually there is a problem that the image does not freeze or the received image quality is deteriorated so that the video is not cut off at the worst.
Therefore, the present invention has been made to solve such problems,
The object is to provide an amplifying apparatus for receiving television for terrestrial digital broadcasting suitable for a mobile object.
Another object of the present invention is to provide a television receiving amplifying apparatus having a wide input level dynamic range.
Another object is to provide a television receiving amplifying device capable of amplifying a television signal that is always in an optimal reception state.
Another object is to provide an amplifying apparatus for receiving television capable of outputting a television signal always in an optimal reception state at a constant output level.
Another object of the present invention is to provide a television reception increasing device suitable for performing television reception on a moving body such as a car.
Another object of the present invention is to provide a television receiver and a receiving system that can be easily installed in a moving body such as a car.

上記課題を解決するために，請求項１の発明は，テレビ放送波受信用の複数のアンテナにて受信したテレビ信号を端末側に一本の伝送線路によって伝送するためのテレビ受信用増幅装置において，少なくとも，アンテナにて受信したテレビ信号を通過すると共に，該受信したテレビ信号の一部を分岐する第１出力分岐回路と，該第１出力分岐回路により分岐されたテレビ信号に基づいて検波信号を生成する第１検波回路と，前記第１出力分岐回路から出力されたテレビ信号を減衰させる第１信号減衰回路と，該第１信号減衰器の減衰量を所定量に制御するための第１制御回路と，から成る複数のテレビ信号受信経路と， 夫々のテレビ信号受信経路から出力されたテレビ信号を混合して一本の伝送線路で出力する混合部と，夫々の前記第１検波回路によって検出した検波信号を受入れてその大きさを比較・判定すると共に，この判定に基づいて，前記混合部から出力される信号が所望のテレビ信号受信経路からのテレビ信号となるように，前記第１信号減衰回路の減衰量を制御する第１制御回路に対する第１信号制御回路制御信号を生成する信号処理部と，前記混合部から出力され，伝送線路を介して入力されたテレビ信号を所定レベルまで増幅する端末側増幅部と，から成り，
前記信号処理部は，夫々の前記第１検波回路から出力される検波信号に基づいて，何れのアンテナで受信したテレビ信号の受信レベルが一番大きいかを判定すると共に，この判定結果に基づいて，受信レベルが最も大きいテレビ信号受信経路に備えた第１信号減衰器の減衰量を最小値にすると共に，残りのテレビ信号受信経路に備えた第１信号減衰器の減衰量を最大値となるように制御するように構成した。
In order to solve the above-mentioned problems, the invention of claim 1 is a television reception amplifying apparatus for transmitting television signals received by a plurality of antennas for receiving television broadcast waves to a terminal side by a single transmission line. , At least a first output branch circuit that passes a television signal received by the antenna and branches a part of the received television signal, and a detection signal based on the television signal branched by the first output branch circuit A first detection circuit for generating a signal, a first signal attenuation circuit for attenuating the television signal output from the first output branch circuit, and a first signal for controlling the attenuation amount of the first signal attenuator to a predetermined amount. A plurality of television signal reception paths comprising a control circuit, a mixing section for mixing the television signals output from the respective television signal reception paths and outputting them by a single transmission line, and each of the first detection lines The detection signal detected by the circuit is received and the magnitude thereof is compared and determined. Based on this determination, the signal output from the mixing unit is a TV signal from a desired TV signal reception path. A signal processing unit that generates a first signal control circuit control signal for a first control circuit that controls an attenuation amount of the first signal attenuation circuit, and a television signal that is output from the mixing unit and input via a transmission line is predetermined. A terminal-side amplifier that amplifies the signal to a level,
The signal processing unit determines, based on the detection signal output from each of the first detection circuits, which antenna has the highest reception level of the television signal received based on the determination result. The attenuation amount of the first signal attenuator provided in the television signal reception path having the highest reception level is minimized, and the attenuation amount of the first signal attenuator provided in the remaining television signal reception paths is maximized. It was configured to control.

請求項２の発明は，請求項１に記載のテレビ受信用増幅装置において，前記信号処理部は，夫々の前記検波回路から出力される検波信号に基づいて，何れのアンテナで受信したテレビ信号の受信レベルが一番大きいかを判定すると共に，この判定結果に基づいて，受信レベルが最も大きいテレビ信号受信経路に介設した第１信号減衰回路の減衰量を最小値にする制御と，残りのテレビ信号受信経路に介設した第１信号減衰回路の減衰量を最大値にする制御と，を所定時間だけずらして行うように構成した。
According to a second aspect of the present invention, in the television reception amplifying device according to the first aspect, the signal processing unit is configured to output a television signal received by any antenna based on the detection signal output from each of the detection circuits. In addition to determining whether the reception level is the highest, based on the determination result, control for minimizing the attenuation of the first signal attenuation circuit provided in the television signal reception path having the highest reception level, and the remaining The first signal attenuating circuit provided in the television signal receiving path is configured to be controlled by shifting the attenuation amount to the maximum value by a predetermined time.

請求項３の発明は，請求項１又は請求項２の何れか一項に記載のテレビ増幅装置において，前記端末側増幅部は，少なくとも，前記伝送線路を介して入力されたテレビ信号を減衰させる第２信号減衰回路と，前記第２信号減衰回路にて減衰されたテレビ信号を増幅するテレビ信号増幅回路と，前記テレビ信号増幅回路にて増幅されたテレビ信号を出力端子側へ出力すると共に，該増幅されたテレビ信号の一部を分岐させる第２出力分岐回路と， 端末側から伝送線路を介して供給される電源電圧を出力側から受け入れると共に，前記第２出力分岐回路から出力されるテレビ信号を出力側へ出力する端末側増幅部電源分離・重畳回路と，前記テレビ信号増幅回路による増幅後のテレビ信号が所定レベルとなるように，前記第２出力分岐回路により分岐されたテレビ信号に基づいて，前記第２信号減衰回路の減衰量を制御するための第２信号減衰回路制御電圧を生成する第２制御回路と，から成り，自動利得調整付きの増幅器であるように構成した。
According to a third aspect of the present invention, in the television amplifying device according to any one of the first or second aspects, the terminal-side amplifying unit attenuates at least a television signal input via the transmission line. A second signal attenuation circuit, a television signal amplification circuit for amplifying the television signal attenuated by the second signal attenuation circuit, and outputting the television signal amplified by the television signal amplification circuit to the output terminal side; A second output branch circuit for branching a part of the amplified television signal; a television that receives a power supply voltage supplied from the terminal side via a transmission line from the output side and that is output from the second output branch circuit; A terminal-side amplifier power supply separation / superposition circuit for outputting a signal to the output side, and the second output branch circuit so that the television signal amplified by the television signal amplification circuit has a predetermined level. A second control circuit for generating a second signal attenuation circuit control voltage for controlling an attenuation amount of the second signal attenuation circuit based on the branched television signal, and an amplifier with automatic gain adjustment. It was configured as follows.

請求孔４の発明は，請求項１乃至請求項３の何れか一項に記載のテレビ受信用増幅装置において，アンテナと，前記テレビ信号受信経路における第１出力分岐回路との間には，夫々，アンテナ側増幅部を備え，該アンテナ側増幅部は，前記端末側増幅部と伝送線路と混合部を介して端末側から供給される電源電圧によって動作するように構成した。
The invention of claim hole 4 is the television receiving amplifying device according to any one of claims 1 to 3, wherein the antenna is provided between the antenna and the first output branch circuit in the television signal receiving path. The antenna side amplifying unit is configured to be operated by a power supply voltage supplied from the terminal side through the terminal side amplifying unit, the transmission line, and the mixing unit.

請求項５の発明は，前請求項１乃至請求項３の何れか一項に記載のテレビ受信用増幅装置において，アンテナと，前記テレビ信号受信経路における第１出力分岐回路との間には，夫々，アンテナ側増幅部と，信号通過回路と，並列に接続された前記アンテナ側増幅部及び信号通過回路の何れか一方の経路を選択的に切換可能な信号経路選択手段とを備え，少なくとも前記アンテナ側増幅部は，前記端末側増幅部と伝送線路と混合部を介して端末側から供給される電源電圧によって動作するように構成した。
According to a fifth aspect of the present invention, in the television reception amplifying device according to any one of the first to third aspects, between the antenna and the first output branch circuit in the television signal reception path, Each includes an antenna side amplifying unit, a signal passing circuit, and a signal path selecting means capable of selectively switching one of the paths of the antenna side amplifying unit and the signal passing circuit connected in parallel, The antenna side amplification unit is configured to operate by a power supply voltage supplied from the terminal side via the terminal side amplification unit, the transmission line, and the mixing unit.

請求項６の発明は，請求項５に記載のテレビ受信用増幅装置において，前記信号処理部は，夫々のテレビ信号受信経路に備えた検波回路によって検出された検波信号が所定基準値より大きいか小さいかを判定すると共に，少なくとも１つの検波回路において検出された検波信号が，前記所定基準値より大きいと判定されたなら，この判定結果に基づいて，全てのテレビ信号受信経路において，アンテナからのテレビ信号が前記信号通過回路を通過するように前記信号経路選択手段を切換制御し，
夫々の検波回路において検出された検波信号が，何れも前記所定の値より小さいと判定されたなら，この判定結果に基づいて，全てのテレビ信号受信経路において，アンテナからのテレビ信号が前記アンテナ側増幅部を通過するように前記信号経路選択手段を切換制御する，ように構成した。
According to a sixth aspect of the present invention, in the television reception amplifying device according to the fifth aspect, the signal processing unit is configured to check whether a detection signal detected by a detection circuit provided in each television signal reception path is greater than a predetermined reference value. If it is determined that the detection signal detected by the at least one detection circuit is larger than the predetermined reference value, on the basis of the determination result, in all the TV signal reception paths, the signal from the antenna is detected. Switching control of the signal path selection means so that a television signal passes through the signal passing circuit;
If it is determined that the detection signals detected in the respective detection circuits are all smaller than the predetermined value, the TV signals from the antennas are received on the antenna side in all TV signal reception paths based on the determination result. The signal path selection means is switch-controlled so as to pass through the amplifying unit.

請求項７の発明は，請求項１乃至請求項６の何れか一項に記載のテレビ受信用増幅装置において，テレビ受信用のアンテナと，少なくとも前記混合部と端末側増幅部との間に介設する所定長さの伝送線路と，を予め備えた。
According to a seventh aspect of the present invention, there is provided the television receiving amplifying device according to any one of the first to sixth aspects, wherein the television receiving antenna is interposed between at least the mixing unit and the terminal side amplifying unit. And a transmission line having a predetermined length to be provided in advance.

請求項８の発明は，請求項１乃至請求項７の何れか一項に記載のテレビ受信用増幅装置において，少なくとも，前記混合部と端末側増幅部との間に介設する伝送線路は，外形寸法が２．５ｍｍと同じ若しくはこれより細径の同軸ケーブルを使用するように構成した。
The invention of claim 8 is the television receiving amplifying device according to any one of claims 1 to 7, wherein at least the transmission line interposed between the mixing unit and the terminal side amplifying unit is: A coaxial cable having an outer dimension equal to or smaller than 2.5 mm was used.

請求項９の発明は，請求項１乃至請求項８の何れか一項に記載のテレビ受信用増幅装置において，少なくとも前記テレビ受信用のアンテナは，車体の外部に装着された表示灯若しくは広告塔に内蔵するように構成した。
A ninth aspect of the present invention is the television receiving amplifying device according to any one of the first to eighth aspects, wherein at least the television receiving antenna is an indicator lamp or an advertising tower mounted outside the vehicle body. It was configured to be built in.

請求項１０の発明は，請求項１乃至請求項９の何れか一項に記載のテレビ受信用増幅装置において，前記テレビ受信用のアンテナは，フィルムアンテナから成るように構成した。
According to a tenth aspect of the present invention, in the television reception amplifying device according to any one of the first to ninth aspects, the television reception antenna is constituted by a film antenna.

請求項１１の発明は，請求項１乃至請求項１０の何れか一項に記載のテレビ受信用増幅装置において，前記テレビ受信用増幅装置は地上ディジタル放送受信用であるように構成した。
According to an eleventh aspect of the present invention, in the television receiving amplifying device according to any one of the first to tenth aspects, the television receiving amplifying device is configured to receive terrestrial digital broadcasts.

請求項１２の発明は，少なくとも，テレビ受信用のアンテナと，該アンテナにて受信したテレビ信号を増幅して端末側に一本の伝送線路によって伝送する増幅部とから成るテレビ受信用増幅装置を備えたテレビ受信システムにおいて，
前記テレビ受信用増幅装置は，請求項１乃至請求項１１の何れかに記載のテレビ受信用増幅装置用いて構成した。
The invention of claim 12 is a television reception amplifying device comprising at least an antenna for television reception and an amplifying unit for amplifying a television signal received by the antenna and transmitting it to the terminal side by a single transmission line. In the television reception system provided,
The television reception amplifying device is configured using the television reception amplifying device according to any one of claims 1 to 11.

請求項１の発明によれば，テレビ放送波受信用の複数のアンテナにて受信したテレビ信号を端末側に一本の伝送線路によって伝送するためのテレビ受信用増幅装置において，少なくとも，アンテナにて受信したテレビ信号を通過すると共に，該受信したテレビ信号の一部を分岐する第１出力分岐回路と，該第１出力分岐回路により分岐されたテレビ信号に基づいて検波信号を生成する第１検波回路と，前記第１出力分岐回路から出力されたテレビ信号を減衰させる第１信号減衰回路と，該第１信号減衰器の減衰量を所定量に制御するための第１制御回路と，から成る複数のテレビ信号受信経路と， 夫々のテレビ信号受信経路から出力されたテレビ信号を混合して一本の伝送線路で出力する混合部と，夫々の前記第１検波回路によって検出した検波信号を受入れてその大きさを比較・判定すると共に，この判定に基づいて，前記混合部から出力される信号が所望のテレビ信号受信経路からのテレビ信号となるように，前記第１信号減衰回路の減衰量を制御する第１制御回路に対する第１信号制御回路制御信号を生成する信号処理部と，前記混合部から出力され，伝送線路を介して入力されたテレビ信号を所定レベルまで増幅する端末側増幅部と，から成り，
前記信号処理部は，夫々の前記第１検波回路から出力される検波信号に基づいて，何れのアンテナで受信したテレビ信号の受信レベルが一番大きいかを判定すると共に，この判定結果に基づいて，受信レベルが最も大きいテレビ信号受信経路に備えた第１信号減衰器の減衰量を最小値にすると共に，残りのテレビ信号受信経路に備えた第１信号減衰器の減衰量を最大値となるように制御するように構成したので，
これによって，常に，一番強い受信レベル状態にあるアンテナからのテレビ信号を選択的に選んで増幅することができる。また，残りの信号経路からは信号が増幅部に入力されないので，雑音等の妨害信号を増幅部に入力させないようにすることができる。
According to the first aspect of the present invention, in a television reception amplifying apparatus for transmitting television signals received by a plurality of antennas for receiving television broadcast waves to a terminal side by a single transmission line, at least the antennas A first output branch circuit that passes the received television signal and branches a part of the received television signal; and a first detection circuit that generates a detection signal based on the television signal branched by the first output branch circuit. A circuit, a first signal attenuation circuit for attenuating the television signal output from the first output branch circuit, and a first control circuit for controlling the attenuation amount of the first signal attenuator to a predetermined amount. Detected by a plurality of television signal receiving paths, a mixing unit that mixes the television signals output from the respective television signal receiving paths and outputs the mixed signal through a single transmission line, and the first detection circuit. The detection signal is received and the magnitude thereof is compared and determined. Based on this determination, the first signal attenuation is performed so that the signal output from the mixing unit becomes a TV signal from a desired TV signal reception path. A signal processing unit that generates a first signal control circuit control signal for a first control circuit that controls the attenuation of the circuit, and a television signal that is output from the mixing unit and input through a transmission line is amplified to a predetermined level. A terminal side amplification unit,
The signal processing unit determines, based on the detection signal output from each of the first detection circuits, which antenna has the highest reception level of the television signal received based on the determination result. The attenuation amount of the first signal attenuator provided in the television signal reception path having the highest reception level is minimized, and the attenuation amount of the first signal attenuator provided in the remaining television signal reception paths is maximized. Because it was configured to control
As a result, it is possible to selectively select and amplify the television signal from the antenna that is always at the strongest reception level. In addition, since signals are not input to the amplifier from the remaining signal paths, it is possible to prevent interference signals such as noise from being input to the amplifier.

請求項２の発明によれば，請求項１に記載のテレビ受信用増幅装置において，前記信号処理部は，夫々の前記検波回路から出力される検波信号に基づいて，何れのアンテナで受信したテレビ信号の受信レベルが一番大きいかを判定すると共に，この判定結果に基づいて，受信レベルが最も大きいテレビ信号受信経路に介設した第１信号減衰回路の減衰量を最小値にする制御と，残りのテレビ信号受信経路に介設した第１信号減衰回路の減衰量を最大値にする制御と，を所定時間だけずらして行うように構成したので，
これによって，常に，一番強い受信レベル状態にあるアンテナからのテレビ信号を取り入れるための切換操作があっても，それに伴って発生する雑音による影響を無くすことができる。
According to a second aspect of the present invention, in the television reception amplifying device according to the first aspect, the signal processing unit is a television which is received by any antenna based on the detection signal output from each of the detection circuits. Determining whether the reception level of the signal is the highest, and controlling the attenuation amount of the first signal attenuation circuit provided in the television signal reception path having the highest reception level based on the determination result, to a minimum value; Since the control for maximizing the attenuation amount of the first signal attenuation circuit provided in the remaining TV signal reception path is shifted by a predetermined time,
As a result, even if there is a switching operation for taking in the television signal from the antenna that is always in the strongest reception level state, it is possible to eliminate the influence due to the noise generated therewith.

請求項３の発明によれば，請求項１又は請求項２の何れか一項に記載のテレビ増幅装置において，前記端末側増幅部は，少なくとも，前記伝送線路を介して入力されたテレビ信号を減衰させる第２信号減衰回路と，前記第２信号減衰回路にて減衰されたテレビ信号を増幅するテレビ信号増幅回路と，前記テレビ信号増幅回路にて増幅されたテレビ信号を出力端子側へ出力すると共に，該増幅されたテレビ信号の一部を分岐させる第２出力分岐回路と， 端末側から伝送線路を介して供給される電源電圧を出力側から受け入れると共に，前記第２出力分岐回路から出力されるテレビ信号を出力側へ出力する端末側増幅部電源分離・重畳回路と，前記テレビ信号増幅回路による増幅後のテレビ信号が所定レベルとなるように，前記第２出力分岐回路により分岐されたテレビ信号に基づいて，前記第２信号減衰回路の減衰量を制御するための第２信号減衰回路制御電圧を生成する第２制御回路と，から成り，自動利得調整付きの増幅器であるように構成したので，
これによって，常に，一番強い受信レベル状態にあるアンテナからのテレビ信号を一定の出力レベルで出力することができる。
According to a third aspect of the present invention, in the television amplifying device according to any one of the first or second aspects, the terminal side amplifying unit receives at least a television signal input via the transmission line. A second signal attenuating circuit for attenuating; a television signal amplifying circuit for amplifying the television signal attenuated by the second signal attenuating circuit; and outputting the television signal amplified by the television signal amplifying circuit to the output terminal side. And a second output branch circuit for branching a part of the amplified television signal, and a power supply voltage supplied from the terminal side via the transmission line is received from the output side and output from the second output branch circuit. A terminal-side amplifier power source separation / superposition circuit for outputting a television signal to the output side, and the second output branch circuit so that the television signal amplified by the television signal amplifier circuit has a predetermined level And a second control circuit for generating a second signal attenuation circuit control voltage for controlling the attenuation amount of the second signal attenuation circuit based on the television signal branched by, and an amplifier with automatic gain adjustment. Because it was configured as
As a result, it is possible to always output a television signal from the antenna in the strongest reception level state at a constant output level.

請求項４の発明によれば，請求項１乃至請求項３の何れか一項に記載のテレビ受信用増幅装置において，アンテナと，前記テレビ信号受信経路における第１出力分岐回路との間には，夫々，アンテナ側増幅部を備え，該アンテナ側増幅部は，前記端末側増幅部と伝送線路と混合部を介して端末側から供給される電源電圧によって動作するように構成したので，
これによって，電界強度が弱い地域においても対応可能となる。
According to a fourth aspect of the present invention, in the television reception amplifying device according to any one of the first to third aspects, the antenna and the first output branch circuit in the television signal reception path are provided. , Each having an antenna side amplification unit, the antenna side amplification unit is configured to operate by the power supply voltage supplied from the terminal side through the terminal side amplification unit, the transmission line and the mixing unit,
This makes it possible to cope with areas where the electric field strength is weak.

請求項５の発明によれば，前請求項１乃至請求項３の何れか一項に記載のテレビ受信用増幅装置において，アンテナと，前記テレビ信号受信経路における第１出力分岐回路との間には，夫々，アンテナ側増幅部と，信号通過回路と，並列に接続された前記アンテナ側増幅部及び信号通過回路の何れか一方の経路を選択的に切換可能な信号経路選択手段とを備え，少なくとも前記アンテナ側増幅部は，前記端末側増幅部と伝送線路と混合部を介して端末側から供給される電源電圧によって動作するように構成したので，
これによって，電界強度が弱い地域でも強い地域でも対応可能なようにダイナミックレンジを広くすることができる。
According to a fifth aspect of the present invention, in the television reception amplifying device according to any one of the first to third aspects, between the antenna and the first output branch circuit in the television signal reception path. Each includes an antenna side amplifying unit, a signal passing circuit, and a signal path selecting means capable of selectively switching either one of the antenna side amplifying unit and the signal passing circuit connected in parallel, Since at least the antenna side amplifying unit is configured to operate by a power supply voltage supplied from the terminal side via the terminal side amplifying unit, the transmission line, and the mixing unit,
This makes it possible to widen the dynamic range so that it can be used in regions where electric field strength is weak or strong.

請求項６の発明によれば，請求項５に記載のテレビ受信用増幅装置において，前記信号処理部は，夫々のテレビ信号受信経路に備えた検波回路によって検出された検波信号が所定基準値より大きいか小さいかを判定すると共に，少なくとも１つの検波回路において検出された検波信号が，前記所定基準値より大きいと判定されたなら，この判定結果に基づいて，全てのテレビ信号受信経路において，アンテナからのテレビ信号が前記信号通過回路を通過するように前記信号経路選択手段を切換制御し，
夫々の検波回路において検出された検波信号が，何れも前記所定の値より小さいと判定されたなら，この判定結果に基づいて，全てのテレビ信号受信経路において，アンテナからのテレビ信号が前記アンテナ側増幅部を通過するように前記信号経路選択手段を切換制御する，ように構成したので，
これによって，電界強度が低い地域でも強い地域でも自動的に対応可能となる。
According to a sixth aspect of the present invention, in the television reception amplifying device according to the fifth aspect, the signal processing unit is configured such that the detection signal detected by the detection circuit provided in each television signal reception path is based on a predetermined reference value. If it is determined whether the detection signal detected by at least one detection circuit is larger than the predetermined reference value, the antennas are determined for all television signal reception paths based on the determination result. Switching control of the signal path selection means so that a television signal from the signal passes through the signal passing circuit,
If it is determined that the detection signals detected in the respective detection circuits are all smaller than the predetermined value, the TV signals from the antennas are received on the antenna side in all TV signal reception paths based on the determination result. Since the signal path selection means is controlled so as to pass through the amplifier,
As a result, it is possible to automatically cope with regions where the electric field strength is low or strong.

請求項７の発明によれば，請求項１乃至請求項６の何れか一項に記載のテレビ受信用増幅装置において，テレビ受信用のアンテナと，少なくとも前記混合部と端末側増幅部との間に介設する所定長さの伝送線路と，を予め備えたので，
これによって，テレビ受信用増輻装置の配設が容易と成る。
According to a seventh aspect of the present invention, in the television reception amplifying device according to any one of the first to sixth aspects, a television reception antenna and at least between the mixing unit and the terminal side amplification unit are provided. With a transmission line of a predetermined length interposed in advance,
This facilitates the arrangement of the TV receiver.

請求項８の発明によれば，請求項１乃至請求項７の何れか一項に記載のテレビ受信用増幅装置において，少なくとも，前記混合部と端末側増幅部との間に介設する伝送線路は，外形寸法が２．５ｍｍと同じ若しくはこれより細径の同軸ケーブルを使用するように構成したので，
これによって，例えば車などの移動体に配設することが容易となる。
According to an eighth aspect of the present invention, in the television reception amplifying device according to any one of the first to seventh aspects, a transmission line interposed at least between the mixing unit and the terminal side amplifying unit. Is configured to use a coaxial cable with an outer dimension equal to or smaller than 2.5 mm.
Thereby, it becomes easy to arrange in a moving body such as a car.

請求項９の発明によれば，請求項１乃至請求項８の何れか一項に記載のテレビ受信用増幅装置において，少なくとも前記テレビ受信用のアンテナは，車体の外部に装着された表示灯若しくは広告塔に内蔵するように構成したので，
これによって，タクシーやバス等が外観を損なうことなくテレビ受信用増輻装置の配設ができる。
According to a ninth aspect of the present invention, in the television receiving amplifying device according to any one of the first to eighth aspects, at least the television receiving antenna is an indicator lamp mounted on the outside of the vehicle body or Since it was configured to be built in the advertising tower,
As a result, it is possible to dispose a television receiving radiation increasing device without impairing the appearance of a taxi, a bus, or the like.

請求項１０の発明によれば，請求項１乃至請求項９の何れか一項に記載のテレビ受信用増幅装置において，前記テレビ受信用のアンテナは，フィルムアンテナから成るように構成したので，
これによって，車等の窓ガラスにアンテナを配設してもすっきりと配線でき，邪魔に成らない。
According to a tenth aspect of the present invention, in the television reception amplifying device according to any one of the first to ninth aspects, the television reception antenna is constituted by a film antenna.
As a result, even if an antenna is arranged on a window glass of a car or the like, wiring can be made cleanly and does not get in the way.

請求項１１の発明によれば，請求項１乃至請求項１０の何れか一項に記載のテレビ受信用増幅装置において，前記テレビ受信用増幅装置は地上ディジタル放送受信用であるように構成した。
これによって，地上ディジタル放送がより安定して受信できる。
According to an eleventh aspect of the present invention, in the television reception amplifying device according to any one of the first to tenth aspects, the television reception amplifying device is configured to receive terrestrial digital broadcasting.
As a result, terrestrial digital broadcasting can be received more stably.

請求項１２の発明によれば，少なくとも，テレビ受信用のアンテナと，該アンテナにて受信したテレビ信号を増幅して端末側に一本の伝送線路によって伝送する増幅部とから成るテレビ受信用増幅装置を備えたテレビ受信システムにおいて，
前記テレビ受信用増幅装置は，請求項１乃至請求項１１の何れかに記載のテレビ受信用増幅装置用いて構成したので，
これによって，防水構造を心配することがないく，設置工事が簡単で，安定したテレビ放送の受信が可能な受信システムを提供できる。
According to the twelfth aspect of the present invention, there is provided an amplifier for television reception comprising at least an antenna for television reception and an amplifying unit for amplifying the television signal received by the antenna and transmitting it to the terminal side by a single transmission line. In a television receiving system equipped with a device,
Since the television receiving amplifying device is configured using the television receiving amplifying device according to any one of claims 1 to 11,
As a result, it is possible to provide a receiving system that does not have to worry about the waterproof structure, is easy to install, and can receive stable TV broadcasts.

以下に，本発明を具体化した実施形態の例を，図面を基に詳細に説明する。
図１は本願に係るテレビ受信用増幅装置の第１の実施形態を示す概略ブロック図であり，図２は本願に係るテレビ受信用増幅装置の第２の実施形態を示す概略ブロック図であり，図３は本願に係るテレビ受信用増幅装置の第３の実施形態を示す概略ブロック図である。
Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic block diagram showing a first embodiment of a television receiving amplifier according to the present application, and FIG. 2 is a schematic block diagram showing a second embodiment of the television receiving amplifier according to the present application. FIG. 3 is a schematic block diagram showing a third embodiment of the television receiving amplifier according to the present application.

図において５０は本発明のテレビ受信用増幅装置である。１はテレビ放送受信用のアンテナであり，本願の実施例によれば地上ディジタル用のＵＨＦアンテナをｎ個備えた実施例を示す。尚以下の説明では説明を簡単にするために，特に明記しない限りアンテナ１−１につながる一系統の信号経路について説明する。
アンテナ１−１で受信されたテレビ信号は，１２−１に示されるアンテナ側増幅部と１３−１に示される信号通過回路を，アンテナ側増幅部１２−１において所定レベルまで増幅させるか，信号通過回路１３−１においてそのまま通過（若しくは所定量だけ減衰させて）させるかを選択的に切換可能に構成された信号経路選択手段１１−１によって選択されて第１出力分岐回路１４に入力される。
アンテナ側増幅部１２−１は，例えば高周波素子としての低雑音トランジスタ等から構成された低雑音プリアンプである。また，本発明における信号通過回路１３−１は，例えばアンテナ側増幅部１２−１を構成するプリント基板における導電材を用い，通過損失が大きくならないように構成されたものである。尚，この信号通過回路１３−１には必要に応じて所定の減衰量を持つ減衰器若しくは複数の減衰量を段階的に選択できるように複数の減衰器を設けてもよい。
信号経路選択手段１１−１は，例えば高周波信号を通過可能なリレーやＰＩＮダイオード等を使って構成された電子スイッチからなリ，この切替えはマニュアル操作でできるようにしても良いし，後に説明するような構成で自動切替えで，できるようにしてもよい。
In the figure, reference numeral 50 denotes a television reception amplifying apparatus of the present invention. Reference numeral 1 denotes a television broadcast receiving antenna. According to the embodiment of the present application, an embodiment including n UHF antennas for digital terrestrial broadcasting is shown. In the following description, for simplification of description, a single signal path connected to the antenna 1-1 will be described unless otherwise specified.
The television signal received by the antenna 1-1 is obtained by amplifying the antenna side amplifying unit indicated by 12-1 and the signal passing circuit indicated by 13-1 to a predetermined level by the antenna side amplifying unit 12-1. The signal is selected by the signal path selection unit 11-1 configured to be selectively switchable to pass (or attenuate by a predetermined amount) as it is in the passing circuit 13-1, and is input to the first output branch circuit 14. .
The antenna side amplifying unit 12-1 is a low noise preamplifier composed of, for example, a low noise transistor as a high frequency element. Further, the signal passing circuit 13-1 in the present invention is configured such that, for example, a conductive material in a printed circuit board constituting the antenna side amplifying unit 12-1 is used so that the passing loss does not increase. The signal passing circuit 13-1 may be provided with an attenuator having a predetermined attenuation amount or a plurality of attenuators so that a plurality of attenuation amounts can be selected step by step as necessary.
The signal path selection means 11-1 is composed of, for example, an electronic switch configured using a relay or a PIN diode that can pass a high-frequency signal. This switching may be performed manually, and will be described later. In such a configuration, automatic switching may be possible.

この信号経路選択手段１１−１から出力されたテレビ信号は，第１出力分岐回路１４−１に入力される。この第１出力分岐回路１４−１はテレビ信号を出力側に送出すると共に，第１出力分岐端子１４−１ａからこのテレビ信号の一部を取り出すように構成された，例えばフェライトコアにポリウレタン線を巻き回した分岐器から成る。第１出力分岐端子１４−１ａには，この端子から出力されたテレビ信号を検波して，テレビ信号の強弱に応じた検波信号を得るための検波ダイオードから成る第１検波回路１５−１が接続されている
The television signal output from the signal path selection unit 11-1 is input to the first output branch circuit 14-1. The first output branch circuit 14-1 is configured to send a television signal to the output side and to extract a part of the television signal from the first output branch terminal 14-1a. For example, a polyurethane wire is connected to a ferrite core. It consists of a winding branch. Connected to the first output branch terminal 14-1a is a first detection circuit 15-1 comprising a detection diode for detecting a television signal output from this terminal and obtaining a detection signal corresponding to the strength of the television signal. Has been

第１出力分岐回路１４−１から出力されたテレビ信号は，第１信号減衰回路１６−１に入力される。この第１信号減衰回路１６−１は，例えばＰＩＮダイオードからなる所謂π型の減衰器であり，第１制御回路１７−１において生成される第１信号減衰回路制御信号に対応した減衰量を得るように構成されている。
The television signal output from the first output branch circuit 14-1 is input to the first signal attenuation circuit 16-1. The first signal attenuating circuit 16-1 is a so-called π-type attenuator made of, for example, a PIN diode, and obtains an attenuation corresponding to the first signal attenuating circuit control signal generated in the first control circuit 17-1. It is configured as follows.

更にこの第１信号減衰回路１６−１の出力には，該第１信号減衰回路１６−１から出力される信号を端末側へ出力すると共に，端末側から伝送線路３を介して供給される電源電圧を，例えば前記アンテナ側増幅部１２−１等の駆動用として供給するように構成した第１電源分離・重畳回路１８−１が接続されている。
尚，本実施例では，少なくとも，前記第１出力分岐回路１４−１と第１検波回路１５−１，第１信号減衰回路１６−１と第１制御回路１７−１でテレビ信号受信経路２−１を構成するものであり，例えば同一プリント基板上に夫々の回路を配設するように構成されている。加えて本発明の第１実施例では，アンテナ側増幅部１２−１，信号通過回路１３−１，信号経路選択手段１１−１，及び，前記第１電源分離・重畳回路１８−１を前記プリント基板上に備えるように構成することによって，機器の小型化，配線の合理化がなされている。また，アンテナ１−２，・・・１−ｎに対しても，これと同様のテレビ信号受信経路２−２，・・・２−ｎが夫々に備えられ，これらの各テレビ信号受信経路２から出力されたテレビ信号は，混合器８において混合された後に伝送線路３を介して端末側に送出される。
Further, the output of the first signal attenuating circuit 16-1 outputs a signal output from the first signal attenuating circuit 16-1 to the terminal side and a power source supplied from the terminal side via the transmission line 3. A first power supply separation / superimposition circuit 18-1 configured to supply a voltage for driving the antenna side amplification unit 12-1, etc., for example, is connected.
In this embodiment, at least the first output branch circuit 14-1, the first detection circuit 15-1, the first signal attenuating circuit 16-1, and the first control circuit 17-1 are connected to the TV signal reception path 2- For example, each circuit is arranged on the same printed circuit board. In addition, in the first embodiment of the present invention, the antenna side amplifying unit 12-1, the signal passing circuit 13-1, the signal path selecting unit 11-1, and the first power source separation / superposition circuit 18-1 are included in the print. By constructing it so as to be provided on the substrate, the equipment is downsized and the wiring is rationalized. The antennas 1-2,..., 1-n are also provided with television signal reception paths 2-2,. The TV signal output from is mixed in the mixer 8 and then transmitted to the terminal side via the transmission line 3.

次に図に示される５は信号処理部である。この信号処理部５は夫々のテレビ信号受信経路２に備えられた前記第１検波回路１５が検波した検波信号を夫々受入れると共に，この夫々の検波信号の大きい小さいを比較・判定するように構成されている。そしてこの判定結果に基づいて，一番大きい検波信号が得られるテレビ信号受信経路２に備えられた第１信号減衰回路１６の減衰量を最小値とし，残りのテレビ信号受信経路に備えられた第１信号減衰回路１６の減衰量を最大値とするように，夫々のテレビ信号受信経路２に備えた第１制御回路１７に対して第１制御回路制御信号を送出するように構成されているのである。即ち，例えばアンテナ１−１が受信しているテレビ信号の強度が一番大きいと判断されたなら，信号処理部５は第１制御回路１７−１に対して第１信号減衰回路１６−１の減衰量を最小にするように第１制御回路制御信号を出力し，第１制御回路１７−２，・・・１７−ｎに対しては第１信号減衰回路１６−２，・・・１６−ｎの減衰量を最大値となるように第１制御回路制御信号を出力するように構成されているのである。これによって，最も受信状態のよい（受信レベルが高い）テレビ信号受信経路２を通過したテレビ信号が，混合器８から端末側に送出されるように構成されているのである。
Next, 5 shown in the figure is a signal processing unit. The signal processing unit 5 is configured to receive the detection signals detected by the first detection circuits 15 provided in the respective television signal reception paths 2 and to compare and determine whether the detection signals are large or small. ing. Based on the determination result, the attenuation amount of the first signal attenuating circuit 16 provided in the television signal receiving path 2 from which the largest detection signal is obtained is set to the minimum value, and the remaining signals are provided in the remaining television signal receiving paths. Since the attenuation amount of the single signal attenuation circuit 16 is set to the maximum value, the first control circuit control signal is transmitted to the first control circuit 17 provided in each television signal reception path 2. is there. That is, for example, if it is determined that the strength of the television signal received by the antenna 1-1 is the highest, the signal processing unit 5 sets the first signal attenuation circuit 16-1 to the first control circuit 17-1. The first control circuit control signal is outputted so as to minimize the attenuation amount, and the first signal attenuation circuit 16-2,... 16- is applied to the first control circuit 17-2,. The first control circuit control signal is output so that the attenuation amount of n becomes the maximum value. Thus, the television signal that has passed through the television signal reception path 2 with the best reception state (high reception level) is transmitted from the mixer 8 to the terminal side.

更には，各テレビ信号受信経路２に備えられた前記第１検波回路１５が検波した夫々の検波信号が所定基準値より強いか弱いかを判断し，何れか１つのテレビ信号受信経路２における受信レベルが所定レベルより強いと判断されたなら，全てのテレビ信号受信経路２の前記信号経路選択手段１１を信号通過回路１３側の信号経路とし，所定基準値を下回ると判断されたなら，全てのテレビ信号受信経路２の前記信号経路選択手段１１をアンテナ側増幅部１２側の信号経路とするように，信号経路選択手段１１に対して信号経路選択手段制御信号を出力するように構成されている。即ち，これによって，電界強度の弱い場所であっても，電界強度の強い場合であっても自動的に対応可能なダイナミックレンジの広いテレビ信号受信経路を構成できるのである。
Further, it is determined whether each detection signal detected by the first detection circuit 15 provided in each television signal reception path 2 is stronger or weaker than a predetermined reference value, and the reception level in any one of the television signal reception paths 2 is determined. Is determined to be stronger than a predetermined level, the signal path selection means 11 of all television signal reception paths 2 is used as a signal path on the signal passing circuit 13 side. The signal path selection unit 11 is configured to output a signal path selection unit control signal to the signal path selection unit 11 so that the signal path selection unit 11 of the signal reception path 2 is a signal path on the antenna side amplification unit 12 side. In other words, this makes it possible to configure a television signal receiving path having a wide dynamic range that can be automatically handled even in a place where the electric field strength is weak or in a case where the electric field strength is strong.

尚，本発明においては，少なくとも，第１出力分岐回路１４，第１検波回路１５，第１信号減衰回路１６，第１制御回路１７から成るテレビ信号受信経路２は同一プリント基板に配設されるように構成されており，該プリント基板は樹脂材料や金属材料から形成されたケースに収納されている。このケースは小型に形成されており，例えば車などの移動体の設置されるアンテナ近傍に，簡単且つ邪魔にならないように設置できるように構成されている。
また，このケース内に収納されるプリント基板には，アンテナ側増幅部１２，第１電源分離・重畳回路１８ばかりでなく，信号処理部５，及び，混合器８等を備えさせるようにしてもよく，後に詳述する第２実施形態，第３実施形態等に合わせて，適宜にその構成を変更してもよい事は言うまでもない。
更に，信号処理部５における第１信号減衰回路１６の制御手順は，例えば，一番受信レベルの強いアンテナに接続されたテレビ信号受信経路に備えた第１信号減衰回路の減衰量を最小値にし，所定時間経過した後にレベルの低いテレビ信号受信経路に備えた第１信号減衰回路の減衰量を最大値となるように所定の時間差を持たせて制御するといった，切換えが同時に行われないようにする事によって，切換え時に発生するノイズ等によって画像がフリーズするなどの影響を無くすことができる。信号経路選択手段の制御手順においても所定時間ずらして制御するように構成してもよい。
In the present invention, the television signal receiving path 2 including at least the first output branch circuit 14, the first detection circuit 15, the first signal attenuation circuit 16, and the first control circuit 17 is disposed on the same printed circuit board. The printed circuit board is housed in a case formed of a resin material or a metal material. This case is formed in a small size, and is configured so that it can be installed easily and without getting in the vicinity of an antenna on which a moving body such as a car is installed.
Further, the printed circuit board accommodated in the case may be provided with not only the antenna side amplification unit 12 and the first power source separation / superimposition circuit 18 but also the signal processing unit 5 and the mixer 8. Needless to say, the configuration may be appropriately changed in accordance with the second embodiment, the third embodiment, or the like, which will be described in detail later.
Furthermore, the control procedure of the first signal attenuation circuit 16 in the signal processing unit 5 is, for example, to minimize the attenuation amount of the first signal attenuation circuit provided in the television signal reception path connected to the antenna having the strongest reception level. , So that the switching of the first signal attenuating circuit provided in the low-level television signal receiving path after a predetermined time has been controlled with a predetermined time difference so as to be the maximum value is not performed simultaneously. By doing so, it is possible to eliminate the influence of the image being frozen due to noise generated at the time of switching. Also in the control procedure of the signal path selection means, control may be performed with a predetermined time shift.

次に，混合器８から出力されたテレビ信号は，伝送線路３を介して端末側増幅部２０に入力される。ここで端末側増幅部２０の説明を行う。
端末側増幅部２０に入力されたテレビ信号は，端末側から伝送線路４，第３電源分離・重畳回路２５を介して供給される電源電圧を，前記伝送線路３に重畳して入力側へ送出すると共に，混合器８からのテレビ信号を出力側へ送出する第２電源分離・重畳回路２８を介してテレビ信号増幅回路２１に入力される。このテレビ信号増幅回路２１は，前記第２電源分離・重畳回路２８を通過したテレビ信号を所望のレベルまで増幅するために，例えば高周波素子としてのトランジスタ等から構成されたアンプである。
Next, the television signal output from the mixer 8 is input to the terminal side amplification unit 20 via the transmission line 3. Here, the terminal side amplification unit 20 will be described.
The television signal input to the terminal side amplification unit 20 is transmitted to the input side by superimposing the power supply voltage supplied from the terminal side via the transmission line 4 and the third power source separation / superimposition circuit 25 on the transmission line 3. At the same time, the television signal from the mixer 8 is input to the television signal amplifier circuit 21 via the second power source separation / superimposition circuit 28 for sending it to the output side. The television signal amplifier circuit 21 is an amplifier composed of, for example, a transistor as a high-frequency element in order to amplify the television signal that has passed through the second power source separation / superposition circuit 28 to a desired level.

次にテレビ信号増幅回路２１において所定レベルまで増幅されたテレビ信号は，このテレビ信号を所定範囲で減衰させる第２信号減衰回路２２に入力される。
この第２信号減衰回路２２は，ＰＩＮダイオードからなる所謂π型の減衰器であり，第２制御回路２７において生成される第２信号減衰回路制御電圧に対応した減衰量を得るように構成されている。
次に第２信号減衰回路２２を通過した信号は，次段のテレビ受信増幅回路２３において所定レベルまで増幅される。この次段のテレビ信号増幅回路２３も，例えばトランジスタ等によって構成された高周波増幅回路であり，特に出力レベルに余裕を持つ高出力型となるようにトランジスタの選択やバイアス設計がなされている。このテレビ信号増幅回路２３において所定レベルまで増幅されたテレビ信号は第２出力分岐回路２４に入力される。
第２出力分岐回路２４は本発明の実施例では，例えばフェライトコアにポリウレタン線を巻回してなる分岐コイルから成る分岐回路であり，テレビ信号増幅回路２３から出力されたテレビ信号を出力側へ出力すると共に，該増幅されたテレビ信号の一部を第２出力分岐端子２４ａに出力するように構成されている。
尚，本願の実施例によれば，端末側増幅部２０を構成するテレビ信号増幅回路２１，２３は，特にこの実施例のような構成に限定されるのもではなく，適宜に所望の特性が得られるように構成してもよい事は言うまでもない。
Next, the television signal amplified to a predetermined level in the television signal amplifier circuit 21 is input to a second signal attenuation circuit 22 that attenuates the television signal within a predetermined range.
The second signal attenuation circuit 22 is a so-called π-type attenuator composed of a PIN diode, and is configured to obtain an attenuation amount corresponding to the second signal attenuation circuit control voltage generated in the second control circuit 27. Yes.
Next, the signal that has passed through the second signal attenuation circuit 22 is amplified to a predetermined level in the television reception amplification circuit 23 in the next stage. The next-stage television signal amplifier circuit 23 is also a high-frequency amplifier circuit composed of, for example, a transistor, and the transistor is selected and the bias is designed so as to be a high output type having a margin in output level. The television signal amplified to a predetermined level in the television signal amplifier circuit 23 is input to the second output branch circuit 24.
In the embodiment of the present invention, the second output branch circuit 24 is a branch circuit composed of, for example, a branch coil formed by winding a polyurethane wire around a ferrite core, and outputs the TV signal output from the TV signal amplifier circuit 23 to the output side. In addition, a part of the amplified television signal is output to the second output branch terminal 24a.
According to the embodiment of the present application, the television signal amplifier circuits 21 and 23 constituting the terminal side amplification unit 20 are not particularly limited to the configuration as in this embodiment, and have desired characteristics appropriately. Needless to say, it may be configured to be obtained.

また，前記第２出力分岐回路２４の第２出力分岐端子２４ａには，所定帯域の信号を通過させる例えばフィルタ手段２９（例えばバンドパスフィルタ）を介して，前記テレビ信号増幅回路による増幅後のテレビ信号を所定レベルとする，第２信号減衰器２２を制御する第２制御回路２７が備えられている。
この第２制御回路２７は，図には省略されているが，第２出力分岐端子２４ａからのテレビ信号を取り込み，端末側増幅部２０における出力レベルの強度を検出するための，例えば信号検波用のダイオードによる検出部と，該検出部から出力される検波信号を取り込み，基準値と比較することによって，出力レベルが基準値を超えているかいないかを判定する，例えばオペレーショナルアンプと抵抗等で構成した演算回路を備えた演算部とから成る。
つまりは，端末側増幅部２０における出力レベルの強度を検出部で検出して，その検波信号が基準値を超えているかいないかの判断を演算部において行い，検波信号が基準値より高い場合は，検波信号に応じた信号が演算部より第２信号減衰回路制御信号として出力され，この第２信号減衰回路制御信号によって，上記第２信号減衰回路２２が制御されることによって，端末側増幅部２０は自動利得調整を行いながら増幅するのである。
検波信号が基準値より低い場合は，演算部より出力される信号がほぼゼロとなり，上記第２信号減衰回路２２には制御電圧が印加されず，該第２信号減衰回路２２は減衰量がほぼゼロの通過状態となり，自動利得調整回路は動作しない通常の増幅部２０として動作するのである。
Further, the second output branch terminal 24a of the second output branch circuit 24 is connected to a television set after being amplified by the television signal amplification circuit via, for example, a filter means 29 (for example, a band pass filter) that passes a signal of a predetermined band. A second control circuit 27 is provided for controlling the second signal attenuator 22 to set the signal to a predetermined level.
Although not shown in the figure, the second control circuit 27 takes in a television signal from the second output branch terminal 24a and detects the output level intensity in the terminal side amplification unit 20, for example, for signal detection. It is composed of an operational amplifier and a resistor, for example, to detect whether the output level exceeds the reference value by capturing the detection signal output from the diode and detecting the signal output from the detection unit and comparing it with the reference value And an arithmetic unit provided with the arithmetic circuit.
In other words, the output level intensity in the terminal side amplification unit 20 is detected by the detection unit, and it is determined whether or not the detection signal exceeds the reference value in the calculation unit. If the detection signal is higher than the reference value, A signal corresponding to the detection signal is output from the arithmetic unit as a second signal attenuation circuit control signal, and the second signal attenuation circuit 22 is controlled by the second signal attenuation circuit control signal, whereby the terminal side amplification unit 20 is amplified while performing automatic gain adjustment.
When the detection signal is lower than the reference value, the signal output from the calculation unit is almost zero, the control voltage is not applied to the second signal attenuation circuit 22, and the second signal attenuation circuit 22 has an attenuation amount of almost zero. The automatic gain adjustment circuit operates as a normal amplifying unit 20 that does not operate because of a zero passing state.

次に端末側増幅部２０から出力されたテレビ信号は，伝送線路４を介して３０に示す端末側装置に入力される。この端末側装置３０は，一般的にテレビ受像機若しくはＴＶモニタや，ＨＤＤレコーダー等のディジタル家電であってもよいし，地上ディジタル放送用のチューナであってもよい。また，これらの端末側装置３０と前記増幅部２０との間に介設した同軸ケーブルに挿設させて，例えば車のシガライターのソケットから電源を取るように構成した，アンテナ側増幅部や端末側増幅部に電源供給するための電源挿入器として構成してもよいなど，特にその構成を限定するものではない。
本発明の実施例では，端末側装置３０は，少なくとも，ＡＣ１００Ｖ若しくは車のバッテリーのＤＣ電源から前記電源電圧を生成する端末側電源生成回路３１と，前記端末側増幅部２０と端末装置３０との間に介設される伝送線路４からのテレビ信号を通過させると共に，前記電源電圧を伝送線路４に重畳して送出するための電源電圧分離・重畳回路３２と，を備えた，地上ディジタル放送用のチューナの例を示しており，このチューナから出力された信号は液晶モニタなどに接続されている。
以上説明したように，本発明にかかる第１の実施形態のテレビ受信用増幅装置５０は，少なくとも，複数のテレビ信号受信経路２から一番受信状態のよいテレビ信号を選択的に出力し，この出力したテレビ信号を自動利得調整をかけながら増幅するように構成されているのである。尚，テレビ受信増幅装置５０として，アンテナを備えても良いし，同軸ケーブルを付属させてもよい等，実施例に限定されるものではない。
Next, the television signal output from the terminal side amplification unit 20 is input to the terminal side device indicated by 30 through the transmission line 4. The terminal device 30 may be a digital home appliance such as a television receiver or a TV monitor or an HDD recorder, or a tuner for terrestrial digital broadcasting. Further, the antenna side amplifying unit or terminal is configured to be inserted into a coaxial cable interposed between the terminal side device 30 and the amplifying unit 20 and to take power from, for example, a car cigarette lighter socket. The configuration is not particularly limited, such as a power insertion device for supplying power to the side amplification unit.
In the embodiment of the present invention, the terminal-side device 30 includes at least a terminal-side power generation circuit 31 that generates the power supply voltage from an AC 100V or a DC power source of a car battery, the terminal-side amplifier 20, and the terminal device 30. For digital terrestrial broadcasting, comprising a power supply voltage separation / superimposition circuit 32 for passing a television signal from the transmission line 4 interposed therebetween and transmitting the power supply voltage superimposed on the transmission line 4 An example of the tuner is shown, and a signal output from the tuner is connected to a liquid crystal monitor or the like.
As described above, the television receiving amplifying apparatus 50 according to the first embodiment of the present invention selectively outputs at least the television signal with the best reception state from the plurality of television signal reception paths 2, and It is configured to amplify the output television signal while applying automatic gain adjustment. The television reception amplifying apparatus 50 is not limited to the embodiment, such as an antenna or a coaxial cable.

次に，本発明のテレビ受信用増幅装置５０を用いた具体的な配線システム例について，図４を用いて説明する。この実施例では少なくともアンテナ１を３つ，例えば車１００の移動体のウインドガラスに設置されている。
この図においてアンテナ１は，例えば透明性の良いフィルム状の絶縁体の表面に導電材料を用いてアンテナ素子を形成したダイポールアンテナから成るＵＨＦディジタル放送用のアンテナであり，それぞれ前面側，左右の側面後方の適宜に離れた位置であって，夫々異なる方向を向くように配置させてあり，何れかのアンテナが最適な受信が出来るようにしてある。
尚，実施例に示すアンテナの設置の状態は特にこの配置に限定されるものではない。またアンテナの形状も実施例に限定されるものではない。
Next, a specific wiring system example using the television receiving amplifier 50 of the present invention will be described with reference to FIG. In this embodiment, at least three antennas 1 are installed, for example, on the window glass of the moving body of the car 100.
In this figure, an antenna 1 is a UHF digital broadcasting antenna composed of a dipole antenna in which an antenna element is formed using a conductive material on a surface of a film-like insulator having good transparency, for example, on the front side and the left and right side surfaces, respectively. The antennas are arranged at different positions in the rear so as to face different directions, so that any one of the antennas can perform optimal reception.
Note that the antenna installation state shown in the embodiment is not particularly limited to this arrangement. Also, the shape of the antenna is not limited to the embodiment.

この実施例においては，収納ケースに３系統のテレビ信号受信経路２と，各テレビ信号受信経路２に対応したアンテナ側増幅部１２，第１電源分離・重畳回路１８等に加え，信号処理部５，及び，混合器８等を相互に影響しないように適宜に配設するように構成した例を示す。この実施例によれば，テレビ信号受信経路２と混合器８との高周波信号の接続，及び，テレビ信号受信経路２と信号処理部５との制御信号の接続が，プリント配線板によってできるので，取り扱いの簡単な構成のテレビ受信用増幅装置を提供できるのである。つまり，アンテナ１と端末側装置３０との伝送線路にテレビ受信用増幅装置５０を介設すれだけになり，システムの配線等が簡単になる。
尚，前記アンテナとテレビ信号受信経路２は，できる限り短い距離で接続することによってテレビ信号のＣ／Ｎの劣化が少なくすることができるので，テレビ信号受信経路２は夫々個別に形成して，アンテナ近傍に備えさせるように構成してもよい。
In this embodiment, the signal processing unit 5 is added to the storage case in addition to the three television signal reception paths 2, the antenna side amplification unit 12 corresponding to each television signal reception path 2, the first power source separation / superimposition circuit 18, and the like. And the example which comprised so that the mixer 8 grade | etc., May be arrange | positioned suitably so that it may not mutually influence is shown. According to this embodiment, the high-frequency signal connection between the television signal reception path 2 and the mixer 8 and the control signal connection between the television signal reception path 2 and the signal processing unit 5 can be made by the printed wiring board. It is possible to provide an amplifying apparatus for television reception having a simple configuration. That is, only the television receiving amplifying device 50 is provided on the transmission line between the antenna 1 and the terminal side device 30, and the system wiring and the like are simplified.
Since the antenna and the TV signal receiving path 2 are connected at a distance as short as possible, the deterioration of the C / N of the TV signal can be reduced. Therefore, the TV signal receiving path 2 is formed individually, You may comprise so that it may be provided in the antenna vicinity.

混合器８と端末側増幅部２０との間に接続されている同軸ケーブル３，また，端末側増幅部２０と端末側装置３０の間に接続されている同軸ケーブル４は，例えば２Ｃ若しくはそれより細径の可曲性の良い同軸ケーブルを用いるのが好適であり，車体のラインや内装に合わせた配設を容易にすると共に，アンテナを車外に設置した場合などに，車体内部への引き込み作業を容易としている。尚，この同軸ケーブ３，４は所定の長さに形成したものを，予め接続した状態にしてもよいし，別体に用意してコネクタで接続できるように構成してもよい。また，端末側増幅部２０を端末側装置３０に内蔵させてもよく，この場合，同軸ケーブル４は不要と成る。
The coaxial cable 3 connected between the mixer 8 and the terminal side amplification unit 20 and the coaxial cable 4 connected between the terminal side amplification unit 20 and the terminal side device 30 are, for example, 2C or more. It is preferable to use a coaxial cable with a small diameter and good bendability, which facilitates installation according to the line and interior of the car body, and when the antenna is installed outside the car, pulls it into the car body. Easy going. The coaxial cables 3 and 4 formed in a predetermined length may be connected in advance or may be prepared separately and connected by a connector. Further, the terminal side amplification unit 20 may be built in the terminal side device 30. In this case, the coaxial cable 4 is not necessary.

次に端末側装置３０について説明する。本発明の実施例ではこの端末側装置３０は地上ディジタル放送用のチューナであり，車のトランクルーム，シートの下，ダッシュボード等に設置されている。
従って，本発明の実施例に示すシステムでは，チューナ３０は，自動的に３つのアンテナの中から一番強いテレビ信号が，所定レベルまで増幅されて入力されている。更にチューナ３０には，入力されたテレビ信号から所定のテレビチャンネル信号を選局・復調する選局・復調手段から成る受信部３５が備えられており，この受信部３５において復調された信号は，例えば車のダッシュボード等に設置された液晶テレビ等の表示手段に接続されるのである。
Next, the terminal side device 30 will be described. In the embodiment of the present invention, the terminal side device 30 is a tuner for digital terrestrial broadcasting, and is installed in a car trunk room, under a seat, in a dashboard or the like.
Therefore, in the system shown in the embodiment of the present invention, the tuner 30 automatically inputs the strongest television signal among the three antennas after being amplified to a predetermined level. Further, the tuner 30 is provided with a receiving unit 35 comprising tuning / demodulating means for selecting / demodulating a predetermined television channel signal from the inputted television signal, and the signal demodulated by the receiving unit 35 is: For example, it is connected to a display means such as a liquid crystal television set on a dashboard of a car.

次に本発明の第２の実施形態として図２を，第３の実施形態として図３を，参照して説明する。尚，以下の説明では，上記第１の実施形態のテレビ共同受信用増幅装置と同様の構成要素については同一符号を付与し，詳細な説明は省略する。
Next, a second embodiment of the present invention will be described with reference to FIG. 2, and a third embodiment will be described with reference to FIG. In the following description, the same components as those of the television joint reception amplifying device of the first embodiment are given the same reference numerals, and detailed description thereof is omitted.

この第２の実施形態では，第１の実施形態と比較してテレビ信号受信経路２の入力の構成が異なるものである。この実施例では，アンテナ１と第１出力分岐回路１４との間にはアンテナ側増幅部１２のみが備えられたものであり，信号経路切換手段１１及び信号通過回路１３を備えていない例であり，強電界地域を除く地域に対応可能である。
また，第３の実施形態では，第１の実施形態と比較してテレビ信号受信経路２の入力にはアンテナ側増幅部１２，信号経路切換部１１及び信号通過回路１３が備えられていない例で，例えば強電界地域に適したテレビ受信用増幅装置を提供できる。
In the second embodiment, the input configuration of the television signal receiving path 2 is different from that of the first embodiment. In this embodiment, only the antenna side amplification unit 12 is provided between the antenna 1 and the first output branch circuit 14, and the signal path switching means 11 and the signal passing circuit 13 are not provided. Therefore, it can be applied to areas other than strong electric field areas.
Further, in the third embodiment, compared with the first embodiment, the input of the television signal reception path 2 is not provided with the antenna side amplification section 12, the signal path switching section 11, and the signal passing circuit 13. , For example, it is possible to provide a television receiving amplifying device suitable for a strong electric field region.

以上，本発明のテレビ受信用増幅装置５０は，特に地上ディジタル放送を受信するために好適であり，これを用いれば，簡単な構成のダイポールアンテナ１を使った受信システムシステムであっても，これらのアンテナを相互に離して複数個設け，これらのアンテナとテレビ受信用増幅装置５０とを接続するだけの簡単な作業で，それぞれのアンテナで受信されたテレビ信号から，もっとも受信レベルの高い信号を増幅すると共に，他のアンテナからの信号は信号減衰器によって増幅部に入力されないようにすることによって，妨害のないテレビ信号を安定して端末側装置に供給できるように構成されており，車の周りの電波状況が大きく変化しても，何れかのアンテナで最適な受信が出来るように構成されるのである。
As described above, the television receiving amplifying apparatus 50 of the present invention is particularly suitable for receiving terrestrial digital broadcasting, and even if this is used, even in a reception system system using a dipole antenna 1 having a simple configuration, A plurality of antennas are provided apart from each other, and the antenna having the highest reception level is obtained from the television signals received by the respective antennas by simply connecting these antennas and the television receiver amplification device 50. In addition to amplifying, signals from other antennas are prevented from being input to the amplifying unit by a signal attenuator, so that a TV signal without interference can be stably supplied to the terminal side device. Even if the surrounding radio wave conditions change greatly, it is configured to be able to receive optimally with any of the antennas.

また，本発明の実施例に示したように，信号経路の制御，信号減衰回路の制御を，僅かに時間をずらすように構成することによって，特に地上ディジタル放送受信に際して，夫々のアンテナからの信号を切替えて一番強いテレビ信号を受信するように構成してあっても，切替え時に発生するノイズ等によって画像がフリーズするなどの影響がないし，回路構成が簡単に成るので安価にできるのである。
In addition, as shown in the embodiment of the present invention, the signal path control and the signal attenuation circuit control are configured so as to be slightly shifted in time, so that the signals from the respective antennas can be obtained particularly when receiving terrestrial digital broadcasting. Even when the strongest television signal is received by switching the image, there is no influence of the image being frozen due to noise or the like generated at the time of switching, and the circuit configuration is simplified, so that the cost can be reduced.

また，例えば，地上ディジタル放送を受信するために使用する場合のように，現時点において地上ディジタル放送波の送信電力などがフルパワーでない地域や，安定的に出されていない地域において使用する場合に最適な受信状態に成るように設置されたままの状態で，２０１１年以降にテレビ放送が完全ディジタル化され，現状の受信状態より多チャンネルの電波が入力されたり，送信電力の増力化がなされたりし，増幅装置に更に大きいレベルの信号が入力されても，自動的に最適な出力レベルが得られるので，入力レベルの変化に対するダイナミックレンジが広い受信できるのである。
It is also ideal for use in areas where the transmission power of terrestrial digital broadcast waves, etc. is not currently at full power, or where it is not being output stably, such as when used to receive terrestrial digital broadcasts. TV broadcasting is completely digitized after 2011 with the receiver installed in a stable reception state, and multi-channel radio waves are input or transmission power is increased from the current reception state. Even when a signal with a higher level is input to the amplifier, the optimum output level can be automatically obtained, so that a wide dynamic range can be received with respect to the change of the input level.

加えて，車のような移動体での使用を考えたときに，完全ディジタル化における受信レベルの変動ばかりでなく，移動時のように短時間の間に，電界強度が大きく変化する場合があるが，この入力の変化に対応するために，移動時（即ち運転時）に，減衰器の設定や入力の信号経路の切換えを，例えばスイッチ等を使って切替える事もなく自動的に最適化されるので，安全性に優れているのである。更に，このようなスイッチ操作をする必要がないので，テレビ受信用増幅装置５０や受信端末装置３０の設置場所は限定されることがなく，極めて利便性の良いテレビ受信用増幅装置を備えたテレビ受信システムが提供できるのである。

尚，本発明は上記実施の形態に限定されるものではなく，本発明の趣旨を逸脱しない範囲で各部構成を適宜に変更して実施することも可能である。
In addition, when considering use in a moving body such as a car, the electric field strength may change significantly in a short time, such as when moving, as well as fluctuations in the reception level in full digitization. However, in order to cope with this change in input, the setting of the attenuator and the switching of the input signal path are automatically optimized during movement (ie during operation) without using a switch, for example. Therefore, it is excellent in safety. Further, since it is not necessary to perform such a switch operation, the installation location of the television receiving amplifying device 50 and the receiving terminal device 30 is not limited, and a television having an extremely convenient television receiving amplifying device is provided. A receiving system can provide it.

It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the configuration of each part without departing from the spirit of the present invention.

本発明に係るテレビ受信増幅装置の第１の実施形態を示す概略ブロック図である。1 is a schematic block diagram illustrating a first embodiment of a television reception amplification device according to the present invention. 第１の実施形態の異なる実施例を示す概略ブロック図である。It is a schematic block diagram which shows the Example from which 1st Embodiment differs. 本願に係る第２の実施形態を示す概略ブロック図である。It is a schematic block diagram which shows 2nd Embodiment which concerns on this application. 本願のテレビ受信用増幅装置を車体に取付けたときの概略図である。It is the schematic when the television receiving amplifier of this application is attached to the vehicle body.

符号の説明Explanation of symbols

１…アンテナ，２…テレビ信号受信経路，３・４…伝送線路，５…信号処理部，８…混合器，１１…信号経路選択手段，１２…アンテナ側増幅部，１３…信号通過経路，１４…第１出力分岐手段，１４ａ…第１出力分岐端子，１５…第１検波回路，１６…第１信号減衰回路，１７…第１制御回路，１８…第１電源分離・重畳回路，２０…端末側増幅部，２１…テレビ信号増幅回路，２２…第２信号減衰回路，２３…テレビ増幅回路，２４…第２出力分岐手段，２４ａ…第２出力分岐端子，２５…第３電源分離・重畳回路，２７…第２制御回路，２８…第２電源分離・重畳回路，２９…フィルタ手段，３０…端末側装置，３１…端末側電源電圧生成回路，３２…電源電圧分離・重畳回路，３５…受信部。
DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Television signal receiving path, 3 * 4 ... Transmission line, 5 ... Signal processing part, 8 ... Mixer, 11 ... Signal path selection means, 12 ... Antenna side amplification part, 13 ... Signal passage path, 14 1st output branch means, 14a ... 1st output branch terminal, 15 ... 1st detection circuit, 16 ... 1st signal attenuation circuit, 17 ... 1st control circuit, 18 ... 1st power supply separation and superposition circuit, 20 ... terminal Side amplification unit, 21 ... TV signal amplification circuit, 22 ... second signal attenuation circuit, 23 ... TV amplification circuit, 24 ... second output branch means, 24a ... second output branch terminal, 25 ... third power source separation / superimposition circuit , 27 ... second control circuit, 28 ... second power supply separation / superimposition circuit, 29 ... filter means, 30 ... terminal side device, 31 ... terminal side power supply voltage generation circuit, 32 ... power supply voltage separation / superposition circuit, 35 ... reception Department.

Claims (12)

テレビ放送波受信用の複数のアンテナにて受信したテレビ信号を端末側に一本の伝送線路によって伝送するためのテレビ受信用増幅装置において，
少なくとも，アンテナにて受信したテレビ信号を通過すると共に，該受信したテレビ信号の一部を分岐する第１出力分岐回路と，該第１出力分岐回路により分岐されたテレビ信号に基づいて検波信号を生成する第１検波回路と，前記第１出力分岐回路から出力されたテレビ信号を減衰させる第１信号減衰回路と，該第１信号減衰器の減衰量を所定量に制御するための第１制御回路と，から成る複数のテレビ信号受信経路と，
夫々のテレビ信号受信経路から出力されたテレビ信号を混合して一本の伝送線路で出力する混合部と，
夫々の前記第１検波回路によって検出した検波信号を受入れてその大きさを比較・判定すると共に，この判定に基づいて，前記混合部から出力される信号が所望のテレビ信号受信経路からのテレビ信号となるように，前記第１信号減衰回路の減衰量を制御する第１制御回路に対する第１信号制御回路制御信号を生成する信号処理部と，
前記混合部から出力され，伝送線路を介して入力されたテレビ信号を所定レベルまで増幅する端末側増幅部と，から成り，
前記信号処理部は，夫々の前記第１検波回路から出力される検波信号に基づいて，何れのアンテナで受信したテレビ信号の受信レベルが一番大きいかを判定すると共に，この判定結果に基づいて，受信レベルが最も大きいテレビ信号受信経路に備えた第１信号減衰器の減衰量を最小値にすると共に，残りのテレビ信号受信経路に備えた第１信号減衰器の減衰量を最大値となるように制御するように構成したことを特徴としたテレビ受信用増幅装置。
In a television reception amplifying apparatus for transmitting television signals received by a plurality of antennas for receiving television broadcast waves to a terminal side by a single transmission line,
At least a first output branch circuit that passes a television signal received by an antenna and branches a part of the received television signal, and a detection signal based on the television signal branched by the first output branch circuit A first detection circuit to be generated, a first signal attenuation circuit for attenuating the television signal output from the first output branch circuit, and a first control for controlling the attenuation amount of the first signal attenuator to a predetermined amount A plurality of television signal receiving paths comprising a circuit;
A mixing unit that mixes the TV signals output from the respective TV signal receiving paths and outputs them by a single transmission line;
The detection signals detected by the respective first detection circuits are received and their magnitudes are compared and determined. Based on this determination, a signal output from the mixing unit is a TV signal from a desired TV signal reception path. A signal processing unit that generates a first signal control circuit control signal for a first control circuit that controls the attenuation amount of the first signal attenuation circuit,
A terminal-side amplifier that amplifies the television signal output from the mixing unit and input via the transmission line to a predetermined level;
The signal processing unit determines, based on the detection signal output from each of the first detection circuits, which antenna has the highest reception level of the television signal received based on the determination result. The attenuation amount of the first signal attenuator provided in the television signal reception path having the highest reception level is minimized, and the attenuation amount of the first signal attenuator provided in the remaining television signal reception paths is maximized. A television receiving amplifying device characterized by being configured to be controlled as described above.
前記信号処理部は，夫々の前記検波回路から出力される検波信号に基づいて，何れのアンテナで受信したテレビ信号の受信レベルが一番大きいかを判定すると共に，この判定結果に基づいて，受信レベルが最も大きいテレビ信号受信経路に介設した第１信号減衰回路の減衰量を最小値にする制御と，残りのテレビ信号受信経路に介設した第１信号減衰回路の減衰量を最大値にする制御と，を所定時間だけずらして行うようにしたことを特徴とした請求項１に記載のテレビ受信用増幅装置。
The signal processing unit determines, based on the detection signal output from each of the detection circuits, which antenna has the highest reception level of the television signal received, and based on the determination result, Control for minimizing the attenuation of the first signal attenuation circuit provided in the television signal reception path having the highest level, and setting the attenuation of the first signal attenuation circuit provided in the remaining television signal reception path to the maximum value 2. The television receiving amplifying apparatus according to claim 1, wherein the control to be performed is shifted by a predetermined time.
前記端末側増幅部は，少なくとも，前記伝送線路を介して入力されたテレビ信号を減衰させる第２信号減衰回路と，
前記第２信号減衰回路にて減衰されたテレビ信号を増幅するテレビ信号増幅回路と，
前記テレビ信号増幅回路にて増幅されたテレビ信号を出力端子側へ出力すると共に，該増幅されたテレビ信号の一部を分岐させる第２出力分岐回路と，
端末側から伝送線路を介して供給される電源電圧を出力側から受け入れると共に，前記第２出力分岐回路から出力されるテレビ信号を出力側へ出力する端末側増幅部電源分離・重畳回路と，
前記テレビ信号増幅回路による増幅後のテレビ信号が所定レベルとなるように，前記第２出力分岐回路により分岐されたテレビ信号に基づいて，前記第２信号減衰回路の減衰量を制御するための第２信号減衰回路制御電圧を生成する第２制御回路と，
から成り，自動利得調整付きの増幅器であるように構成したことを特長とした請求項１又は請求項２の何れか一項に記載のテレビ受信用増幅装置。
The terminal-side amplifying unit includes at least a second signal attenuation circuit for attenuating a television signal input via the transmission line;
A television signal amplifier circuit for amplifying the television signal attenuated by the second signal attenuation circuit;
A second output branch circuit for outputting the television signal amplified by the television signal amplifier circuit to the output terminal side and branching a part of the amplified television signal;
A terminal side amplifying unit power supply separation / superposition circuit for receiving a power supply voltage supplied from the terminal side via the transmission line from the output side and outputting a television signal output from the second output branch circuit to the output side;
The second signal attenuating circuit controls the amount of attenuation based on the television signal branched by the second output branch circuit so that the television signal amplified by the television signal amplifier circuit has a predetermined level. A second control circuit for generating a two-signal attenuation circuit control voltage;
4. The television receiving amplifying device according to claim 1, wherein the amplifying device is configured to be an amplifier with automatic gain adjustment.
アンテナと，前記テレビ信号受信経路における第１出力分岐回路との間には，夫々，アンテナ側増幅部を備え，該アンテナ側増幅部は，前記端末側増幅部と伝送線路と混合部を介して端末側から供給される電源電圧によって動作するように構成したことを特徴とした請求項１乃至請求項３の何れか一項に記載のテレビ受信用増幅装置。
Between the antenna and the first output branch circuit in the television signal receiving path, an antenna side amplifying unit is provided, and the antenna side amplifying unit passes through the terminal side amplifying unit, the transmission line, and the mixing unit. 4. The television receiving amplifying device according to claim 1, wherein the amplifying device is configured to operate with a power supply voltage supplied from a terminal side.
アンテナと，前記テレビ信号受信経路における第１出力分岐回路との間には，夫々，アンテナ側増幅部と，信号通過回路と，並列に接続された前記アンテナ側増幅部及び信号通過回路の何れか一方の経路を選択的に切換可能な信号経路選択手段とを備え，少なくとも前記アンテナ側増幅部は，前記端末側増幅部と伝送線路と混合部を介して端末側から供給される電源電圧によって動作するように構成したことを特徴とした請求項１乃至請求項３の何れか一項に記載のテレビ受信用増幅装置。
Between the antenna and the first output branch circuit in the television signal reception path, any of an antenna side amplifying unit, a signal passing circuit, and the antenna side amplifying unit and signal passing circuit connected in parallel, respectively. Signal path selection means capable of selectively switching one path, and at least the antenna side amplifying unit is operated by a power supply voltage supplied from the terminal side via the terminal side amplifying unit, transmission line, and mixing unit The television receiving amplifying device according to any one of claims 1 to 3, wherein the amplifying device for television reception is configured as described above.
前記信号処理部は，夫々のテレビ信号受信経路に備えた検波回路によって検出された検波信号が所定基準値より大きいか小さいかを判定すると共に，少なくとも１つの検波回路において検出された検波信号が，前記所定基準値より大きいと判定されたなら，この判定結果に基づいて，全てのテレビ信号受信経路において，アンテナからのテレビ信号が前記信号通過回路を通過するように前記信号経路選択手段を切換制御し，
夫々の検波回路において検出された検波信号が，何れも前記所定の値より小さいと判定されたなら，この判定結果に基づいて，全てのテレビ信号受信経路において，アンテナからのテレビ信号が前記アンテナ側増幅部を通過するように前記信号経路選択手段を切換制御する，ように構成したことを特徴とした請求項５に記載のテレビ受信用増幅装置。
The signal processing unit determines whether the detection signal detected by the detection circuit provided in each television signal reception path is larger or smaller than a predetermined reference value, and the detection signal detected by at least one detection circuit is: If it is determined that the signal is larger than the predetermined reference value, the signal path selection means is controlled to switch so that the TV signal from the antenna passes through the signal passing circuit in all TV signal reception paths based on the determination result. And
If it is determined that the detection signals detected in the respective detection circuits are all smaller than the predetermined value, the TV signals from the antennas are received on the antenna side in all TV signal reception paths based on the determination result. 6. The television receiving amplifying device according to claim 5, wherein the signal path selecting means is controlled so as to pass through an amplifying unit.
テレビ受信用のアンテナと，少なくとも前記混合部と端末側増幅部との間に介設する所定長さの伝送線路と，を予め備えたことを特徴とした請求項１乃至請求項６の何れか一項に記載のテレビ受信用増幅装置。
The antenna according to any one of claims 1 to 6, further comprising a television receiving antenna and a transmission line having a predetermined length interposed between at least the mixing unit and the terminal side amplification unit. The amplification device for television reception according to one item.
少なくとも，前記混合部と端末側増幅部との間に介設する伝送線路は，外形寸法が２．５ｍｍと同じ若しくはこれより細径の同軸ケーブルを使用するように構成したことを特徴とした請求項１乃至請求項７の何れか一項に記載のテレビ受信用増幅装置。
At least the transmission line interposed between the mixing unit and the terminal side amplifying unit is configured to use a coaxial cable having an outer dimension equal to or smaller than 2.5 mm. The television receiving amplifying device according to any one of claims 1 to 7.
少なくとも前記テレビ受信用のアンテナは，車体の外部に装着された表示灯若しくは広告塔に内蔵するように構成したことを特徴とした請求項１乃至請求項８の何れか一項に記載のテレビ受信用増幅装置。
9. The television reception according to claim 1, wherein at least the television receiving antenna is built in an indicator lamp or an advertising tower mounted outside a vehicle body. Amplification device.
前記テレビ受信用のアンテナは，フィルムアンテナから成ることを特徴とした請求項１乃至請求項９の何れか一項に記載のテレビ受信用増幅装置
10. The television reception amplifying device according to claim 1, wherein the television reception antenna is a film antenna.
前記テレビ受信用増幅装置は地上ディジタル放送受信用であることを特徴とした請求項１乃至請求項１０の何れか一項に記載のテレビ受信用増幅装置。
11. The television reception amplification device according to claim 1, wherein the television reception amplification device is for terrestrial digital broadcast reception.
少なくとも，テレビ受信用のアンテナと，該アンテナにて受信したテレビ信号を増幅して端末側に一本の伝送線路によって伝送する増幅部とから成るテレビ受信用増幅装置を備えたテレビ受信システムにおいて，
前記テレビ受信用増幅装置は，請求項１乃至請求項１１の何れかに記載のテレビ受信用増幅装置用いて構成したことを特徴としたテレビ受信システム。
In a television reception system including a television reception amplifying device comprising at least a television reception antenna and an amplification unit that amplifies a television signal received by the antenna and transmits the signal to a terminal side by a single transmission line,
12. A television receiving system, wherein the television receiving amplifying device is configured by using the television receiving amplifying device according to claim 1.
JP2005268751A 2005-09-15 2005-09-15 Television receiving amplifier, and television reception system Pending JP2007081975A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008048986A1 (en) * 2008-09-25 2010-04-08 Atmel Automotive Gmbh Antenna amplifier, receiving system, method of operation and use of a receiving system
JP2011244374A (en) * 2010-05-21 2011-12-01 Mitsubishi Electric Corp Broadcast receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008048986A1 (en) * 2008-09-25 2010-04-08 Atmel Automotive Gmbh Antenna amplifier, receiving system, method of operation and use of a receiving system
US8837647B2 (en) 2008-09-25 2014-09-16 Atmel Corporation Antenna amplifier, receiving system, operating method, and use of a receiving system
DE102008048986B4 (en) 2008-09-25 2019-03-14 Atmel Corp. Antenna amplifier and receiving system
JP2011244374A (en) * 2010-05-21 2011-12-01 Mitsubishi Electric Corp Broadcast receiver

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