JPS5848520A - Electronic tuner for television receiver - Google Patents
Electronic tuner for television receiverInfo
- Publication number
- JPS5848520A JPS5848520A JP14734281A JP14734281A JPS5848520A JP S5848520 A JPS5848520 A JP S5848520A JP 14734281 A JP14734281 A JP 14734281A JP 14734281 A JP14734281 A JP 14734281A JP S5848520 A JPS5848520 A JP S5848520A
- Authority
- JP
- Japan
- Prior art keywords
- tuning
- vhf
- circuit
- uhf
- signal
- 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
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/246—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection using electronic means
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はテレビジ冒ン受像機の電子同調チェーナ装置−
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is an electronic tuning changer device for a television receiver.
It is related to
従来、テレビジｌン受像機の電子同調チエーナ装置、に
あっては第１図に示す如（ＵＨＦｆ３−−す系と複数段
の、高６周波同調回路を有するＶＨＦｆｓ−−す系とを
有し、そのＵＨＦＨＦチ＝°す系の中間周波信号がＶＨ
Ｆチューナ系の中間周波゛増幅回路に入力される様にな
されていた。Conventionally, an electronic tuning tuner device for a television receiver has a UHF f3 system and a VHF fs system having a multi-stage high six frequency tuning circuit, as shown in Fig. 1. , the intermediate frequency signal of the UHFHF channel is VH.
It was designed to be input to the intermediate frequency amplifier circuit of the F tuner system.
卿ち、第１図に於いて、（１）はυＨ’Ｆチェー九１（
２）はＶ ＨＦ ｆ ：Ｌ−す系である。Sir, in Figure 1, (1) is υH'F 91 (
2) is a V HF f :L-su system.
先ずＶ ＨＦ （２）について説明すると、翰はアンテ
ナ、ａ］）は入力整合回路、ａりはその次段に接続され
た第１の高周波同調回路（“以下単に同調回路と云う）
、ＱＳＧ家高周波増幅器、 ａ４１は第２め同調回路。First, to explain V HF (2), the wire is the antenna, a) is the input matching circuit, and a is the first high frequency tuning circuit connected to the next stage (hereinafter simply referred to as the tuning circuit).
, QSG family high frequency amplifier, a41 is the second tuning circuit.
（ハ）は第３の同調回路、 （１１１９はミクす９．ａ
ηは局部発振器、α■家中間周波（ＩＦ）信号の出力端
子であり、例えば５８．７５ＭＨｚの中間周波信号が得
られる。(c) is the third tuning circuit, (1119 is the mixer 9.a
η is a local oscillator, α is an output terminal for an intermediate frequency (IF) signal, and an intermediate frequency signal of, for example, 58.75 MHz is obtained.
第１、第２及び第３・の各同調回路α汎（１（及び（へ
）は互に同一に構成・されているので、・互に対応する
部分に同一符号を附して示す。これら回路＋ｉ ｗイル
（財）及び（ハ）の直列回路と、この直列回路に並列に
接続され・た可変容量ダイオード（２）とより構成され
、端子Ｃ！υより各可変容量ダイオード＠に与える逆パ
イアスミ圧を変更するととによって、これら各同調回路
ａ■普及び粗篩の同調周波数を変更し、任意のチャンネ
ルを受信するようにし【いる。又■はＶＨＦ受信時の−
１わゆ′るｐ−チャンネル（１〜３０Ｈ）及びハイチャ
ンネル（４〜１２ｃＨ）の切換スイッチであって、その
ハイチャンネルへの切換状態で、端子（２）より夫々ス
イッチングダイオードｇａＫ電流を供給し、これらをオ
ンさせ志ととにより、各々のツイル四を交流的に短絡さ
せることにより、へ同調周波数は上述した各回路輪轡卸
それとは異なる）が、これは省略すする。The first, second, and third tuning circuits α-panel (1 (and ()) are constructed and constructed in the same way, so corresponding parts are shown with the same reference numerals. The circuit consists of a series circuit of +i and (c) and a variable capacitance diode (2) connected in parallel to this series circuit, and a reverse voltage applied to each variable capacitance diode @ from the terminal C!υ. By changing the pie-sumi pressure, the tuning frequency of each of these tuning circuits (a) and coarse sieve is changed so that any channel can be received.
It is a selector switch for p-channel (1 to 30H) and high channel (4 to 12cH), which supplies switching diode gaK current from terminal (2) in the switching state to the high channel. , by turning on these and short-circuiting each of the twin wheels in an alternating current manner, the tuning frequency is different from that of each circuit cycle described above, but this will be omitted.
υＨＦチェーナ系＜１）を説明すると、（３）はアンテ
ナ、（４）は入力整合同調回路、（５）は高周波増幅回
路。To explain the υHF Chainer system <1), (3) is an antenna, (4) is an input matching tuning circuit, and (5) is a high frequency amplifier circuit.
（６）は高周波同調選択回路、（７）はミクサ、（８）
は局部発振器である。モしてよりナ（））よ・りの出力
（例えば５８．７５ＭＨｚ）中間馬ｉｕｔ号）＃’上１
１ｉＶＨＦ系（２）のンクｔａ・に供給され、この場合
のミクサａｅはＵＨＰ系（１）Ｋ対する中間周数増幅回
路となる。(6) is a high frequency tuning selection circuit, (7) is a mixer, (8)
is the local oscillator. output (for example, 58.75 MHz) intermediate horse iut) #' upper 1
The mixer ae in this case becomes an intermediate frequency amplification circuit for the UHP system (1)K.
そし【入力整合同調回路（４）、高周波同調選択回路（
６）及び局部発振器（８）内にも可変容量ダイオードを
使用した同調回路を有し、端子（２υより、ＶＨＦ系色
）と同時に、逆バイアス電圧を与えるようにし【いる。Then [input matching tuning circuit (4), high frequency tuning selection circuit (
6) and the local oscillator (8) also have a tuning circuit using a variable capacitance diode, so as to apply a reverse bias voltage at the same time as the terminal (from 2υ, VHF color).
（９）及ヒａｌＳｔＵ ＨＦ 系（１）及ヒＶ ＨＦ
系（２）ＫＮスル動作電流の供給の為の切換スイッチで
あって１、連動する。よっていずれか一方、の系が動作
状態となり、他方の系は不動作状態となる。尚スイッチ
（９）及び１．１４ｔｊＨＦ系（１）側に切換えた状態
で裔１、ＶＨＦ系（２）のハイチャンネ鈴ローチャンネ
ル切換スイッチ翰は、通常ローチャンネル側に切換えら
れるようになされてＮ−する。 、
このような電子同調チニーナ装、置ｋｔｋ−・℃・、Ｕ
ＨＦ系（１）を動作させてＵＨＦ放送受信状態のとき
、端子ｒ２υのある電圧（Ｖｌとする）であるＵＨＦ局
が受信されたとする。ところ力１、この電圧Ｖｓ ｋｔ
ＶＨＦ？５−−す系（２）１にも同時に印加されて〜す
るため、この電圧Ｖｌが、Ｖ）ＩＦチューナ系（２）の
同調回路……に対するあるＶＨＦ局を受信するに適する
電圧であり、且つそのＶＨＦ放送が強電界による、もの
であるときには、Ｖ）（Ｆ系（２）の高周波増幅・回路
−の寄生容量（Ｃｋて示す）等により第１の同調回路Ｑ
′ＩＪから第２の同調回路Ｉに放送信号が伝送され、即
ちミクサαｅにこの信号が入力され、その結果、ＵＨＦ
放送受信時Ｘａａ妨害が発生して正常な受信ができなく
なるおそれがあった。(9) and H alStU HF system (1) and H V HF
System (2) A changeover switch for supplying KN-sle operating current. Therefore, one of the systems becomes active, and the other system becomes inactive. In addition, when the switch (9) and the 1.14tj HF system (1) side are switched, the high channel/low channel changeover switch for the VHF system (2) is normally switched to the low channel side. do. , Such an electronic tuning china device, ktk-・℃・,U
Assume that when the HF system (1) is operated and in a UHF broadcast reception state, a UHF station whose terminal r2υ has a certain voltage (denoted as Vl) is received. Therefore, the force is 1, this voltage Vs kt
VHF? 5- Since it is simultaneously applied to system (2) 1, this voltage Vl is a voltage suitable for receiving a certain VHF station for the tuning circuit of V) IF tuner system (2). In addition, when the VHF broadcast is based on a strong electric field, the first tuning circuit Q
'The broadcast signal is transmitted from IJ to the second tuning circuit I, that is, this signal is input to the mixer αe, and as a result, the UHF
There was a risk that Xaa interference would occur during broadcast reception, making normal reception impossible.
本発明は斯かる点に鑑み考慮した電子同調チヱーナ装置
を提供するものであ・す、第２図以下を参照しつつ詳細
に説明するに、第１図と対応する部分には同一符号を附
し【その詳細な説明を省略する。The present invention provides an electronic tuning tuner device taken into consideration.The present invention will be described in detail with reference to FIG. 2 and subsequent figures, in which parts corresponding to those in FIG. [The detailed explanation is omitted.]
本発明においては、ＵＨＦ系（１）の動作状態で、ＶＨ
Ｆ系（２）の同調回路ｔｉ２Ｊｔｉ４ ＱＪのうちの少
ぐとも１つの同調周波数を、他のそれと異ならしめるよ
うにしたものである。この為第２−図に示す例では、Ｕ
ＨＦ系（１）の電源ラインをダイオード（２）と抵抗器
（２）とから成る直列回路を通じ【第２の同調回路（１
４）のスイッチングダイオード翰のアノード側に接続し
たものである。（２）はダイオードであり、グイ゛オー
ド（２）を介した電圧を第２の同調回路ａ４のスイッチ
ングダイオード１２Ｑにだけ印加するために設けるもの
である。In the present invention, in the operating state of the UHF system (1), the VH
At least one of the tuning circuits ti2Jti4QJ of the F system (2) is made to have a different tuning frequency from the others. Therefore, in the example shown in Figure 2, U
The power line of the HF system (1) is connected to the second tuning circuit (1) through a series circuit consisting of a diode (2) and a resistor (2).
4) is connected to the anode side of the switching diode wire. (2) is a diode, which is provided to apply the voltage via the diode (2) only to the switching diode 12Q of the second tuning circuit a4.
この様な構成によれば、今ＬＪ ＨＦ’放送受信′状′
態のとき、υＨＦチューナ系（１）から中間周波信号力
ｔＶ ＨＦ ｆ３−−す系（２）（’） ミクサ（１ｅ
Ｋ入力すＦＬテＶ１１Ｆ局の受信がなされる。この′場
合ＵＨＦ？≦−す系（１）の電源ラインよりダイオード
翰と抵抗器翰とからなる直列回路を介してＶＨＦチュー
ナ系（２）の第２の同調回路Ｉのスイッチングダイオー
ド（至）に電圧が印加されているために、仮りにアンテ
ナａ１よりＶ ＨＦの受信信号があって、これがｖＨ′
ｒ・系“（２）を伝達されようとしても、第２の同調回
路Ｉのみが、この場合−・イチャンネルに゛同調して〜
・るため、ＶＨＦの受信信号が減衰されると共に第３の
同調回路（１５＋とは結合状態が粗であるため入力信号
力β略消滅されＵ ＨＦ放送信号に対する混信妨會を除
去することが出来る。−、
第３図は本発明の他の実施例を示し、・Ｃ（ｌ） ＆を
直流阻止用のコンデンサ、（至）はコイルである。ＵＨ
Ｆ放送受信状態のとき端子Ｃ３３に印加される電圧によ
ってダイオード（５）を導通状態となす。この様にして
、同調コイルｃ！４及び＠にコイル（至）（並列接続す
るととＫより、同調回路α荀の同調周波数が変化される
ものである。又本例に於いてコイル（至）を同調回路０
４）Ｋ並列接続したけれども、コンデンサを同調回路（
１４）ｋ並列接続しても良いことは明らかである。According to this configuration, the LJ HF' broadcast reception status is now
When the υHF tuner system (1) transfers the intermediate frequency signal power tV HF f3 to the
The FLTE V11F station that receives K input is received. In this case, is it UHF? ≦-A voltage is applied from the power supply line of the system (1) to the switching diode (to) of the second tuning circuit I of the VHF tuner system (2) through a series circuit consisting of a diode wire and a resistor wire. Therefore, suppose there is a received signal of VHF from antenna a1, and this is vH'
Even if the r system "(2)" is to be transmitted, only the second tuned circuit I is tuned to the i channel in this case.
・As a result, the VHF received signal is attenuated, and the third tuning circuit (15+) has a rough coupling condition, so the input signal power β is almost eliminated, making it possible to eliminate interference with the UHF broadcast signal. -, Figure 3 shows another embodiment of the present invention, where ・C(l) & is a capacitor for DC blocking, and (to) is a coil.UH
When in the F broadcast receiving state, the diode (5) is made conductive by the voltage applied to the terminal C33. In this way, the tuning coil c! When the coil (to) is connected in parallel to 4 and @, the tuning frequency of the tuned circuit α is changed by K. Also, in this example, the coil (to) is connected to the tuned circuit 0
4) Although K is connected in parallel, the capacitor is connected in a tuned circuit (
14) It is clear that k parallel connections may be used.
尚、上述実施例に於いては第２の同調回路ａ４に対して
適用したが、他の同ａｌ１回路α■＄の１つに対して適
用しても良いことは勿論である。In the above embodiment, the present invention is applied to the second tuning circuit a4, but it goes without saying that the present invention may also be applied to one of the other same al1 circuits α■$.
以上述べた如く本発明に依れば、ＵＨＦ放送受信状態の
ときに、ＶＨＦチューナ系（２）のアンテナ舖からの受
信信号による混信及び妨害をなくすことが出来る。As described above, according to the present invention, it is possible to eliminate crosstalk and interference caused by received signals from the antenna of the VHF tuner system (2) during UHF broadcast reception.
第１図は従来のテレビジョン受像機の電子同調チューナ
装置を示す系統図、第２図は本発明によるテレビジョン
受像機の電子同調チューナ装置の一実施例を示す系統図
、第３図は本発明の他の実施例な示す同調回路の回路図
である。
（１）はＵＨＦチューナ系、（２）はＶＨＦチェーナ系
、８２）、Ｉ及び（ハ）は夫々第１、第２及び第３の高
周波同調回路、勾はダイオード、（至）は抵抗器、］末
ダイオード、（至）はコイルである。FIG. 1 is a system diagram showing a conventional electronic tuning tuner device for a television receiver, FIG. 2 is a system diagram showing an embodiment of the electronic tuning tuner device for a television receiver according to the present invention, and FIG. 3 is a system diagram showing the present invention. FIG. 6 is a circuit diagram of a tuning circuit according to another embodiment of the invention. (1) is a UHF tuner system, (2) is a VHF tuner system, 82), I and (c) are the first, second and third high frequency tuning circuits, respectively, slope is a diode, (to) is a resistor, ] end is the diode, (to) is the coil.
Claims (1)
ＨＦチェーナ系とを有し、上記υＨＦチー−す系よりの
中間周波信号が上記ＶＨＦチェーナＪ！ＩＩＯ中間周波
増幅回路に供給されるようＫなされ、上記Ｕ ＨＦ ｆ
ニー−す系及びＶＨＦチェーナ系−転換して動作電流
を供給すると、とにより、いずれか一方を動作させるよ
５Ｋｔ、た電子同調チューナ装置に於いて、ＵＨＦテエ
ーナ系への動作電流の供給状態で、上記ＶＨＦチューナ
系内の高周波同調回路の少なくとも１つを、他儂周波同
調回路の同調周波数に対して異ならしめる手段を有する
テレビジ璽ン費像機の電子同調チェーナ装置。υHF? V with &- system and multi-stage high frequency tuning circuit
The intermediate frequency signal from the υHF chainer system is the VHF chainer J! The above U HF f is supplied to the IIO intermediate frequency amplification circuit.
When the Nice system and the VHF tuner system are switched and the operating current is supplied, one of them will be operated by 5Kt. An electronic tuning changer device for a television display imager, comprising means for making at least one of the high frequency tuning circuits in the VHF tuner system different from the tuning frequency of another frequency tuning circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14734281A JPS5848520A (en) | 1981-09-18 | 1981-09-18 | Electronic tuner for television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14734281A JPS5848520A (en) | 1981-09-18 | 1981-09-18 | Electronic tuner for television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5848520A true JPS5848520A (en) | 1983-03-22 |
Family
ID=15428009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14734281A Pending JPS5848520A (en) | 1981-09-18 | 1981-09-18 | Electronic tuner for television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5848520A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004057860A1 (en) * | 2002-12-20 | 2004-07-08 | Koninklijke Philips Electronics N.V. | Receiver and method for receiving and selecting signals |
-
1981
- 1981-09-18 JP JP14734281A patent/JPS5848520A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004057860A1 (en) * | 2002-12-20 | 2004-07-08 | Koninklijke Philips Electronics N.V. | Receiver and method for receiving and selecting signals |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0346495B1 (en) | Television tuner | |
| US4555809A (en) | R.F. Diplexing and multiplexing means | |
| JPH118562A (en) | Television signal reception tuner | |
| JP3038459B2 (en) | Television device signal selection circuit | |
| US7609127B2 (en) | Electronically controllable RF switch | |
| US5212824A (en) | Mixer for frequency converting both ground and satellite broadcasting signals | |
| EP0473120B1 (en) | Double super-heterodyne tuner | |
| JP2001339652A (en) | Television tuner | |
| JPS5848520A (en) | Electronic tuner for television receiver | |
| US3631348A (en) | Signal distribution system | |
| KR20030024412A (en) | Reception apparatus for analog/digital broadcasting signal of a television set | |
| US3458819A (en) | Uhf-if or vhf-if converter | |
| JP2578854B2 (en) | Receiver circuit | |
| US5420646A (en) | Bandswitched tuning system having a plurality of local oscillators for a digital television receiver | |
| US6593835B1 (en) | Multiple-tuning circuit of tuner preventing selection characteristic deterioration | |
| US7209726B2 (en) | Switch in UHF bandpass | |
| KR900004410B1 (en) | Two mode u.h.f. tuner | |
| KR100328492B1 (en) | Three band tracking filter for digital satellite broadcasting tuner | |
| JP3224991B2 (en) | Tuner circuit | |
| KR0153964B1 (en) | Common receiver of a tv | |
| JPS62283Y2 (en) | ||
| JPH0210684Y2 (en) | ||
| JP2575493B2 (en) | Variable bandpass filter | |
| JPS5821248Y2 (en) | All channel channel | |
| JPS5829641Y2 (en) | tv jiyeon chiyuna |