JPS6083430A - Input circuit of television receiver - Google Patents
Input circuit of television receiverInfo
- Publication number
- JPS6083430A JPS6083430A JP19153783A JP19153783A JPS6083430A JP S6083430 A JPS6083430 A JP S6083430A JP 19153783 A JP19153783 A JP 19153783A JP 19153783 A JP19153783 A JP 19153783A JP S6083430 A JPS6083430 A JP S6083430A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- band
- uhf
- broadcast
- vhf
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、ＵＨＦ帯及びＶＨＦ帯のテレビジョン放送ｃ
以下ＴＶ放送と略す）並びにＶＨＦ帯のＦＭ放送を受信
する機能を有するテレビジョン受像器Ｃ以下ＴＶ七ノド
と略す）の入力回路に関するものである。[Detailed Description of the Invention] [Technical Field] The present invention relates to television broadcasting in the UHF band and VHF band.
This invention relates to an input circuit for a television receiver C (hereinafter abbreviated as TV) having a function of receiving FM broadcasts in the VHF band (hereinafter abbreviated as TV broadcast) and FM broadcast in the VHF band.
一般に、ＵＨＦ帯及びＶＨＦ帯のＴＶ放送並びにＶＨＦ
帯のＦＭ放送を受信する機能を有するＴＶ上セツト入力
回路は、第１図に示すような構成から収りでいる。In general, TV broadcasting in the UHF band and VHF band, as well as VHF
A TV set input circuit having a function of receiving FM broadcasts can be configured as shown in FIG.
第１図において、アンテナ１で受信されたＬＴ ＨＦ帯
及びＶＨＦＨＦ帯ビジョン放送信号（以下ＴＶ倍信号略
す）並びにＶＨＦ帯ＦＭ放送信月（以下ＦＭ信号と略す
）は、ＴＶ七ノドのアンテナ端子ｉ子２に入力され、Ｔ
Ｖ放送・ＦＭ放送の切り換えスイッチ乙の入力端子４に
入力される。ここで、ＴＶ放送を受信する場合には、上
記切り換えスイッチがＴＶ放送受信側に切り換えられ、
ＴＶ放送受信側出力端子５より信号が取り出され、ＵＨ
Ｆ信号・ＶＨＦ信号分波器６の入力端子７に入力される
。そして１．ｉ：配分波器のＵＨＦＨＦ信号出力子１子
８出力されたＵＨＦ信号はＴ’ Ｖ放送受信用チューナ
９のＵＨＦ信号入力端子１ｏに入力され、映像及び音声
出力が得られるよう適当に信号処理される。才だ、上記
分波器のＶ ＨＦ’信号出力端子１１から出力されたＶ
ＨＦ信号は上記チューナのＶ Ｈ，Ｆ信号入力端子１２
に入力され同様に処理される。一方、ＦＭ放送を受信す
る場合には、」二記切り換えスイッチがＦＭＭ送受信側
に切り換えられ、ＦＭＭ送受信側出力端子１３より信号
が取り出され、ＦＭ放送受信用チヱーナ１４の入力端子
１５に入力され、音声出力が得られるよう適当に信号処
理される。In Fig. 1, the LT HF band and VHF HF band vision broadcasting signal (hereinafter abbreviated as TV double signal) and VHF band FM broadcasting signal (hereinafter abbreviated as FM signal) received by antenna 1 are transmitted from the antenna terminal i of the TV seven nodes. input to child 2, T
It is input to the input terminal 4 of the V broadcast/FM broadcast changeover switch B. Here, when receiving TV broadcasting, the changeover switch is switched to the TV broadcasting receiving side,
The signal is taken out from the TV broadcast receiving side output terminal 5, and the UH
It is input to the input terminal 7 of the F signal/VHF signal splitter 6. And 1. i: The UHF signal outputted from the UHF signal output terminal 1 and 8 of the wave distribution device is input to the UHF signal input terminal 1o of the T'V broadcast receiving tuner 9, and is appropriately processed to obtain video and audio output. Ru. The V output from the V HF' signal output terminal 11 of the above-mentioned duplexer
The HF signal is connected to the VH, F signal input terminal 12 of the above tuner.
and processed in the same way. On the other hand, when receiving FM broadcasting, the switch is switched to the FMM transmitting/receiving side, a signal is taken out from the FMM transmitting/receiving side output terminal 13, and is input to the input terminal 15 of the FM broadcast receiving tuner 14. Appropriate signal processing is performed to obtain audio output.
しかし、このような従来形の溝成においては、ＵＨＦ帯
までの高周波領域にわたる信号を切り換えるだめ、切り
換えスイッチの損失が大きく、また、信号系のインピー
ダンスの乱れも太きくなりＴＩ ＨＦ帯のＴＶ受信時の
雑音指数が悪化する問題点がある。しかも、一般にＴＶ
放送受信用チューナの伴音指数はＶＨＦ帯に比べてＵＨ
Ｆ帯の方が大きいため、ＵＨＦ帯ＴＶ放送受信性能がＶ
ＨＦ帯のそれに比べて接動に悪化する傾向にある。However, in such a conventional channel configuration, it is not possible to switch signals over a high frequency range up to the UHF band, so the loss of the changeover switch is large, and the impedance disturbance in the signal system becomes large.TI HF band TV reception There is a problem that the noise figure deteriorates when the time is reached. Moreover, in general, TV
The accompaniment index of the tuner for broadcast reception is UH compared to the VHF band.
Since the F band is larger, the UHF band TV broadcast reception performance is V
It tends to be worse in contact than in the HF band.
本発明は、これらの問題点を除去するためになされたも
のであり、ＴＶ上セツト入力回路において、ＴＶ放送・
ＦＭ放送切り換えスイッチとＵＨＦ信号・ＶＨＦ化号分
波器との挿入位置を変更することによってＵＨＦ帯での
損失を低減させ、ＵＨＦ帯ＴＶ放送受信性能の向上を図
ったものである。The present invention has been made to eliminate these problems, and is a TV set input circuit for TV broadcasting.
By changing the insertion position of the FM broadcast selector switch and the UHF signal/VHF signal splitter, the loss in the UHF band is reduced and the UHF band TV broadcast reception performance is improved.
すなわち、本発明においては、ＵＨＦ帯ＴＶ信号を、Ｔ
Ｖ放送・ＦＭ放送切り携えスイッチを介さず、ＵＨＦ信
号・ＶＨＦ信岩分波器のＵＨＦ信号出力端子より取り出
してＴＶ放送受信用チー−すのＵＨＦ信号入力端子に入
力させたため、ＵＨＦ帯での切り換えスイッチの損失を
消滅させると共に信号系のインピーダンスの乱れを防ぐ
ことができる。従って、本発明のＴＶ七ノドにおいては
ＵＨＦ帯のＴＶ受信時の雑音指数の悪化を防止すること
ができ、ＵＨＦ帯ＴＶ放送受信性能の向上を実現するこ
とができる。That is, in the present invention, the UHF band TV signal is
By taking out the UHF signal from the UHF signal output terminal of the UHF signal/VHF Shiniwa splitter and inputting it to the UHF signal input terminal of the TV broadcast reception team without going through the V broadcast / FM broadcast switch, the It is possible to eliminate the loss of the changeover switch and prevent disturbances in the impedance of the signal system. Therefore, in the TV system of the present invention, it is possible to prevent the noise figure from deteriorating during UHF band TV reception, and it is possible to improve the UHF band TV broadcast reception performance.
それでは、本発明について実施例を用いて説明する。第
２図は、本発明にかかる実施例で、第１図と対応する部
分については同一符号で示した。The present invention will now be described using examples. FIG. 2 shows an embodiment of the present invention, in which parts corresponding to those in FIG. 1 are designated by the same reference numerals.
第２図において、アンテナ１で受信されたＵＨＦ帯及び
Ｖ、ＨＦ帯ＴＶ信号並びに、 Ｖ ＨＦ帯ＦＭ信号は、
ＴＶセリトのアンテナ端子２に入力され、ＵＨＦ信号・
ＶＨＦ信号分波器６′の入力端子７′に入力され、上記
分波器のＵＨＦ信号出カ出力８からｉ’−ｔｔｙａＦ帯
ＴＶ信号が取り出され、その信号は、ＴＶ放送受信用チ
ー−す９のＵ、ＨＦ信号入力端子１０に入力されて、映
像及び音声出力が得られるよう適当に信号処理される。In Fig. 2, the UHF band, V, HF band TV signals, and VHF band FM signal received by antenna 1 are as follows:
The UHF signal is input to antenna terminal 2 of the TV Cerrito.
The i'-ttyaF band TV signal is input to the input terminal 7' of the VHF signal splitter 6', and is extracted from the UHF signal output 8 of the splitter. The signal is input to the U and HF signal input terminals 10 of 9, and the signal is appropriately processed to obtain video and audio outputs.
また、上記分波器のＶＨＦ信号出力端子１１′からは、
Ｖ、ＨＦ帯ＴＶ信号及びＶＨ？帯’ＦＭ信号が出力さり
１、ＴＶ放送・ＦＭ放送切り換えスイッチ６′の入力端
子４′に入力される。ここで、ＶＨ’Ｆ帯ＴＶ放送を受
信する場合には、上記切り換えスイッチがＴＶ放送受信
側に切り換えられ、ＴＶ放送受信側出力端子５′より信
号が取り出され、上記ＴＶ放送受信用チューナのＶＨＦ
信号入力端子１２に入力されて、映像及び音声出力が得
られるよう適当に信号処理される。Also, from the VHF signal output terminal 11' of the duplexer,
V, HF band TV signal and VH? The band' FM signal is outputted 1 and inputted to an input terminal 4' of a TV broadcast/FM broadcast changeover switch 6'. Here, when receiving a VH'F band TV broadcast, the changeover switch is switched to the TV broadcast receiving side, a signal is taken out from the TV broadcast receiving side output terminal 5', and the VHF band of the TV broadcast receiving tuner is output.
The signal is input to the signal input terminal 12, and the signal is appropriately processed to obtain video and audio output.
一方、Ｖ）ＩＦ帯ＦＭ放送を受信する場合には、上記切
り換えスイッチがＦＭ放送受仏側に切り換えられ、ＦＭ
放放送受信用出力端子１３′り信号が取り出され、ＦＭ
Ｍ送受信用チューナ１４の入力端子１５に入力され、音
声出力が得られるように適当に処理される。On the other hand, when receiving V) IF band FM broadcast, the changeover switch is switched to the FM broadcast reception side, and the FM
Broadcast reception output terminal 13' signal is taken out and FM
The signal is input to the input terminal 15 of the M transmitting/receiving tuner 14, and is appropriately processed so as to obtain an audio output.
それでは、ここで第１図と第２図の（％ｉ号経路の相違
について説明する。まずＵＨＦ帯ＴＶ信号に関しては、
第２図においては、第１図に比べて、切り換えスイッチ
の分だけ経路が短かくなっている。次にＶｌ（Ｆ帯ＴＶ
信号に関しては、分波器と切り換えスイッチの順序とし
ては逆になっているものの経路としては同一である。ま
た、ＶＨＦ帯ＦＭ信号に関しては分波器の分だけ経路が
長くなっている。Now, let's explain the difference between the (%i) routes in Figures 1 and 2. First, regarding the UHF band TV signal,
In FIG. 2, compared to FIG. 1, the path is shorter by the changeover switch. Next, Vl (F band TV
Regarding the signal, although the order of the duplexer and changeover switch is reversed, the route is the same. Further, regarding the VHF band FM signal, the path is longer due to the duplexer.
すなわち、本発明のＴＶ上セツト入力回路においては、
ＵＨＦ帯ＴＶ信号は、ＴＶ放送−ＦＭ放送切り換えスイ
ッチを経由していない。そのためＵＨＦ帯ＴＶ放送受信
時に、上配切り換えスイッチ分の損失がなくなると共に
、信号経路が短かくなって、信号系のインピーダンスの
乱れが少くなる。従って、本発明のＴＶ上セツトおいて
は、ＵＨＰ帯ＴＶ放送受信時の雑音指数が改善される、
一般に、ＴＶ放送受信用チューナの雑音指数はＵＨＦ帯
において増大する傾向にあるため、本発明による雑音指
数の改善は、ＵＨＦ帯ＴＶ放送受信性能の向上に極めて
大きく寄与する６また、ＶＨＦ帯ＴＶ放送受信時には、
受信性能は従来形ＴＶ上セツト不変である。一方、ＶＨ
Ｆ帯ＦＭ信号に関しては、ＵＨＦ信号・ＶＨＦ信号分波
器を経由するが、ＶＨＦ帯ＦＭ放送の周波数ｌ″を最大
でも約１１０ＭＨｚであり、損失の増大１−ｔｌａ少で
ある。さらに、一般にＶＨＦ帯ＦＭ放送受信用チューナ
の雑音指数は極めて良好である上に、音声信号のみを再
生すれば良いため、受信性能に及ぼす影響はほとんどな
い。That is, in the TV set input circuit of the present invention,
The UHF band TV signal does not go through a TV broadcast-FM broadcast changeover switch. Therefore, when receiving UHF band TV broadcasting, the loss caused by the upper switching switch is eliminated, the signal path is shortened, and disturbances in the impedance of the signal system are reduced. Therefore, in the TV set of the present invention, the noise figure when receiving UHP band TV broadcasting is improved.
In general, the noise figure of a TV broadcast reception tuner tends to increase in the UHF band, so the improvement of the noise figure according to the present invention will greatly contribute to improving the UHF band TV broadcast reception performance6. When receiving,
The reception performance remains unchanged on conventional TV sets. On the other hand, V.H.
Regarding the F-band FM signal, it passes through a UHF signal/VHF signal splitter, but the maximum frequency l'' of VHF-band FM broadcasting is approximately 110 MHz, and the increase in loss is less than 1-tla.Furthermore, in general, VHF The noise figure of the tuner for band FM broadcast reception is extremely good, and since only the audio signal needs to be reproduced, there is almost no effect on reception performance.
以上、詳細に説明したように１本発明のＴＶセ・・トの
入力回路においては、ＴＶ放送・ＦＭ放送切り換えスイ
ッチとＵＨＦ信号・Ｖ）ＩＦ信号分波器との挿入位置を
変更したため、ＵＨＦ帯ＴＶ信号は、切り換えスイッチ
を経由しない。従って、損失が低減されると共に信号系
のインピーダンスの乱れが少なくなり、雑音指数が改善
され、受信性能の向上が可能となる。As explained in detail above, in the input circuit of the TV set of the present invention, the insertion position of the TV broadcast/FM broadcast changeover switch and the UHF signal/V) IF signal splitter is changed, so that the UHF The band TV signal does not go through a changeover switch. Therefore, loss is reduced and disturbances in signal system impedance are reduced, noise figure is improved, and reception performance can be improved.
第１図は、従来形のＴＶセ・トの入力回路の構成図、第
２図は、本発明のＴＶセ・トの入力回路の実施例を示す
構成図である。
１、・アンテナ ２・・アンテナ端子
６′・・ＴＶ放送・ＦＭ放送切り換えスイッチ４′・・
切り換えスイッチの入力端子
５’、１３’・・切シ換えスイッチの出力端子６′・・
ＵＨＦ信号・ＶＨＦ信号分波器７′・・分波器の入力端
子
８・・分波器のＵＨＦＴＶ信号出力端子９・・ＴＶ放送
受信用チューナ
１０・・ＴＶ放送受信用チューナのＵ）ＴＦ信号入力端
子
１１′・・分波器のＶＨＦ信号出力端子１２・・ＴＶ放
送受信用チューナのＶＨＦ信号入力端子
１４・・ＦＭ放送受信用チューナ
ｌｈ’・ＩＩ’ Ｍ ／１１ノ送り・ｌｌ’ｌ川ゾ□用
ツ・の入力端子具 上
出願人 株式会社 諏訪精工台
代理人 弁理士 最上 務
第１図
第２図″５FIG. 1 is a block diagram of a conventional TV set input circuit, and FIG. 2 is a block diagram showing an embodiment of the TV set input circuit of the present invention. 1. Antenna 2 Antenna terminal 6' TV broadcast/FM broadcast switch 4'...
Changeover switch input terminals 5', 13'... Changeover switch output terminals 6'...
UHF signal/VHF signal splitter 7'...Input terminal 8 of the splitter...UHF TV signal output terminal 9 of the splitter...Tuner for TV broadcast reception 10...U) TF signal of the tuner for TV broadcast reception Input terminal 11'...VHF signal output terminal 12 of the splitter...VHF signal input terminal 14 of the TV broadcast reception tuner...FM broadcast reception tuner lh', II' M/11 feed, ll'l river Input terminal for zo
Claims (1)
Ｆ帯のＦＭ放送を受信する機能を有するテレビジョン受
像機の入力回路において、ＵＨＰ信号・ＶＨＦ信号分波
器の入力端子を上記テレビジョン受像機のアンテナ端子
に接続し、上記分波器のＵＨＦ信号出力端子を上記テレ
ビジョン受像器のテレビジョン放送受信用チューナーの
Ｕ ＨＦ （Ｆｉ号大入力端子接続し、上記分波器のＶ
ＨＦ信云出力端子をテレビジョン放送・ＦＭ放送切り換
えスイッチの入力端子に接続し、上記切り換えスイーノ
チのテレビジョン受信側出力端子を土肥テレビジョンチ
ー−すのＶＨＦ信号入力端子に接続し、上記切り換えス
イッチのＦＭ受信側出力端子を、上記テレビＳンヨン受
像機の７Ｍ放送受信用チー−す入力端子に接続したこと
を特徴とするテレビジョン受像機入力回路。UHF band, VH, F band television broadcasting and VH
In the input circuit of a television receiver having the function of receiving F-band FM broadcasts, the input terminal of a UHP signal/VHF signal splitter is connected to the antenna terminal of the television receiver, and the UHF signal of the splitter is connected to the antenna terminal of the television receiver. Connect the signal output terminal to the U HF (No. Fi large input terminal) of the television broadcast receiving tuner of the television receiver, and
Connect the HF signal output terminal to the input terminal of the television broadcast/FM broadcast changeover switch, connect the television receiving side output terminal of the above switching switch to the VHF signal input terminal of the Toi Television Team, and connect the above changeover switch. A television receiver input circuit characterized in that an FM receiving side output terminal of the television receiver is connected to a 7M broadcast reception cheese input terminal of the television receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19153783A JPS6083430A (en) | 1983-10-13 | 1983-10-13 | Input circuit of television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19153783A JPS6083430A (en) | 1983-10-13 | 1983-10-13 | Input circuit of television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6083430A true JPS6083430A (en) | 1985-05-11 |
Family
ID=16276314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19153783A Pending JPS6083430A (en) | 1983-10-13 | 1983-10-13 | Input circuit of television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6083430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180367791A1 (en) * | 2017-06-20 | 2018-12-20 | Ethertronics, Inc. | Host-Independent VHF-UHF Active Antenna System |
-
1983
- 1983-10-13 JP JP19153783A patent/JPS6083430A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180367791A1 (en) * | 2017-06-20 | 2018-12-20 | Ethertronics, Inc. | Host-Independent VHF-UHF Active Antenna System |
| US10419749B2 (en) * | 2017-06-20 | 2019-09-17 | Ethertronics, Inc. | Host-independent VHF-UHF active antenna system |
| US10764573B2 (en) | 2017-06-20 | 2020-09-01 | Ethertronics, Inc. | Host-independent VHF-UHF active antenna system |
| US11284064B2 (en) | 2017-06-20 | 2022-03-22 | Ethertronics, Inc. | Host-independent VHF-UHF active antenna system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5014349A (en) | Television tuner for common use in BS/UV | |
| JPH11341453A (en) | Network interface module | |
| US4612571A (en) | Constant Z bandswitched input filter | |
| US4499495A (en) | Switching diplexer for single antenna input television receivers | |
| GB2203306A (en) | I.f. circuit for multiple tv broadcast standards | |
| US7421040B2 (en) | Modem tuner | |
| JPS6083430A (en) | Input circuit of television receiver | |
| JPH06225322A (en) | Correcting filter for side band of chrominance signal | |
| JPH11355681A (en) | Receiver of television broadcasting | |
| JPH09200068A (en) | Television signal changeover output circuit | |
| US2906815A (en) | Television relay and like apparatus | |
| JP3036880B2 (en) | Bandpass filter division method | |
| JP2575493B2 (en) | Variable bandpass filter | |
| JPS6122382Y2 (en) | ||
| JP3308648B2 (en) | Broadband DBS tuner | |
| CN101286748A (en) | Broadcast receiving apparatus and method for receiving broadcast signal | |
| KR920002534B1 (en) | On earth broadcasting and satellite broadcasting common receiver system | |
| JP4216439B2 (en) | Satellite switch and satellite reception system | |
| JPH06133317A (en) | Tuner | |
| JP2819552B2 (en) | Video signal processing circuit | |
| JPS5830334Y2 (en) | signal supply device | |
| JPH0112442Y2 (en) | ||
| JPS59128834A (en) | Frequency band switching device | |
| Rao | Comments on Modern Trends in Colour Tv Receiver Technology: JIETE, May 1982, 226–230 | |
| JPS5890890A (en) | Color television receiver |