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 |
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