JPS60146520A - Channel selection circuit for television set - Google Patents
Channel selection circuit for television setInfo
- Publication number
- JPS60146520A JPS60146520A JP247784A JP247784A JPS60146520A JP S60146520 A JPS60146520 A JP S60146520A JP 247784 A JP247784 A JP 247784A JP 247784 A JP247784 A JP 247784A JP S60146520 A JPS60146520 A JP S60146520A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- resistance element
- point
- uhf
- variable resistance
- 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
- H03J5/242—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 used exclusively for band selection
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は可変抵抗素子を用いたテレビ用選局回路に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a television channel selection circuit using a variable resistance element.
従来小型テレビ等で一般的に用いられる、可変抵抗素子
を用いた選局回路は、第１図に示す如く、チューナの受
信バンドを切換えるバンドスイッチ（１）と、同調電圧
を供給する可変抵抗素子（２）より成っていた。As shown in Figure 1, a tuning circuit using a variable resistance element, which is commonly used in small TVs, has a band switch (1) that switches the receive band of the tuner, and a variable resistance element that supplies a tuning voltage. It consisted of (2).
この回路方式は構成が簡素であるが、以下に列記する欠
点を有していた。Although this circuit system has a simple configuration, it has the following drawbacks.
（α）日本国内を例にすると、ｖＨＩｌ″低バンド（以
下ＶＬと言う）３チヤンネル、ＶＨＦ高バント（以下Ｖ
Ｈと言う）９チヤンネル、ＵＨＦ（以下Ｕと言う）５０
チヤンネルが、はぼ同じ可変抵抗素子の可変範囲にある
ので、選局表示部が第２図の如くなり、バンド間の選局
感触の差が大きい。(α) Taking Japan as an example, there are 3 channels of vHIl'' low band (hereinafter referred to as VL), 3 channels of VHF high band (hereinafter referred to as VL),
H) 9 channels, UHF (hereinafter referred to as U) 50
Since the channels are within the variable range of the same variable resistance element, the channel selection display section becomes as shown in FIG. 2, and there is a large difference in the tuning feel between the bands.
（ｂ）チヱーナの同調電圧特性のバラツキによる選局光
示部の指針の機械的なズレが大きい。(b) There is a large mechanical deviation in the pointer of the tuning light display due to variations in the tuning voltage characteristics of the tuner.
（ｃ ）ＶＨＦ地域では頻繁に発生する、ＶＬ、ＶＨの
切換えにバンドスイッチの操作を必要とし′、操作性が
悪い。(c) It is necessary to operate a band switch to switch between VL and VH, which frequently occurs in VHF regions, and operability is poor.
第１図の回路の改善案として、中間タップとスイッチン
グ素子付の可変抵抗素子を用いた、従来技術の実施列が
第３図の回路である。As an improvement to the circuit of FIG. 1, the circuit of FIG. 3 is an implementation of the prior art using a variable resistance element with an intermediate tap and a switching element.
この回路を採用した場合の選局表示部は第４図の如くな
り、第１図の回路の欠点、（Ｃ）項を解決し、（ａ、ン
項を改善し、（ｂ）項のＶＬ時を改善する。When this circuit is adopted, the channel selection display section becomes as shown in Fig. 4, which solves the drawbacks of the circuit shown in Fig. 1, item (C), improves items (a and n), and improves the VL of item (b). improve time.
以下に第３図の回路の動作について説明する。The operation of the circuit shown in FIG. 3 will be explained below.
Ｖ Ｌ 時はバンドスイッチ（１）と可変抵抗素子（２
ンのスイッチによりＬＢが供給される。When V L, band switch (1) and variable resistance element (2
LB is supplied by the main switch.
ＤＩ 、Ｄ２．ＴＲ１、’［’Ｒ２，によりＴＲ３がオ
ン、ＴＲ４がオフするので、ａｈ間でＶＨ２、Ｒ２、Ｒ
１，Ｒ３で決定される同調電圧範囲を可変する。DI, D2. TR1, '['R2, turns TR3 on and TR4 off, so VH2, R2, R
1, to vary the tuning voltage range determined by R3.
ＶＨ時はバンドスイッチ（１）と可変抵抗素子（２）の
スイッチによりＨＢが供給される。At VH, HB is supplied by the band switch (1) and the variable resistance element (2).
Ｄ２ 、ＴＲ１，ＴＲ２、によりＴＲ３がオフ＼ＴＲ４
がオンするので、αＣ間でＶＲｉ 、ＶＨ３で決定され
る同調電圧範囲を可変する。TR3 is turned off by D2, TR1, TR2, TR4
is turned on, so the tuning voltage range determined by VRi and VH3 is varied between αC.
Ｕ時はバンドスイッチ（１ンよりＵＢが供給され、ＤＩ
、ＴＲ１、ＴＲ２，によりＴＲ３がオフ、’ｌ”Ｒ４
もオフするので、Ｒ６間で、ＶＲｌ 、Ｒ１により決定
される同調電圧範囲を可変する。At U time, the band switch (UB is supplied from the 1st line, DI is
, TR1, TR2, turns off TR3, 'l''R4
Since both are turned off, the tuning voltage range determined by VRl and R1 is varied between R6.
以上が第３図の回路の動作説明であるが、チューナ内で
ＬＢが抵抗を介して接地されているので、ＶＬのみ接地
の条件を作る為に、ダイオード２石、トランジスタ２石
を用いている。The above is an explanation of the operation of the circuit shown in Figure 3. Since LB is grounded through a resistor in the tuner, two diodes and two transistors are used to create the condition that only VL is grounded. .
従来技術（残３図の回路）の欠点は以下の二点である。The drawbacks of the prior art (circuits shown in the remaining three figures) are as follows.
（ｄ）部品点数が多く高コストである。(d) The number of parts is large and the cost is high.
（ｇ）ＵＨＦの指針ズレには対応できない。(g) Cannot cope with UHF pointer misalignment.
本発明は中間タップとスイッチング素子付の可変抵抗素
子を用いたテレビ用選局回路において、低コストで、Ｕ
ＨＦの指針ズレにも対応可能な、実用性の高い回路を提
供することである。The present invention provides a television channel selection circuit using a variable resistance element with an intermediate tap and a switching element, which is low in cost and has a U.
It is an object of the present invention to provide a highly practical circuit that can cope with HF pointer deviation.
本発明は中間タップとスイッチング素子付の可変抵抗素
子を用いたテレビ用選局回路において、中間タップと可
変抵抗素子の一端に並列に抵抗素子を接続し、ＶＨＦ高
バンド用電源電圧を用いて中間タップを低抵抗とするこ
とにより、ごの区間をＶＨＦ高バンド用同調電圧発生回
路とし、一方の区間をｖＨア低バンド用同調電圧発生回
路とし、更にＵＩＨＦ用電源電圧を用いて双方の区間の
抵抗値の不均衡を是正して、双方の区間をＵＨＦ用同調
電圧発生回路とすると共に、双方の区間の抵抗値の不均
衡を是正する手段を利用して、ＵＨＦチューナの同調電
圧特性のバラツキを補正することを特徴とする。The present invention relates to a TV channel selection circuit using a variable resistance element with an intermediate tap and a switching element, in which a resistance element is connected in parallel to the intermediate tap and one end of the variable resistance element, and the intermediate By making the taps low resistance, each section is used as a VHF high band tuning voltage generation circuit, one section is used as a VH low band tuning voltage generation circuit, and the UIHF power supply voltage is used to generate both sections. By correcting the imbalance in resistance values, both sections are used as a UHF tuning voltage generation circuit, and by using means for correcting the imbalance in resistance values in both sections, variations in the tuning voltage characteristics of the UHF tuner can be corrected. It is characterized by correcting.
以下、本発明について実施列に基づき詳細に説明する。 Hereinafter, the present invention will be described in detail based on examples.
本発明の実施例は第５図であり、選局表示部は従来同第
４図と同じである。An embodiment of the present invention is shown in FIG. 5, and the channel selection display section is the same as the conventional one shown in FIG. 4.
以下に本発明の第５図の回路の動作を説明する。The operation of the circuit of FIG. 5 according to the present invention will be explained below.
ＬＢ、ＨＢ、ＵＢの供給法はバンドスイッチ（１ンと、
可変抵抗素子のスイッチ（２）により、従来例と同様で
ある。The supply method for LB, HB, and UB is a band switch (1
It is the same as the conventional example because of the variable resistance element switch (2).
ＶＬ時は’ｌ１１１．ＴＲ，２がオフするので、同調電
圧供給部の等価回路は第６図となり、ＶＨ５はＶＲｌと
αＣ間の抵抗値、及びＶＨ２とＲ２の合成抵抗である。At VL time, 'l111. Since TR,2 is turned off, the equivalent circuit of the tuning voltage supply section is shown in FIG. 6, where VH5 is the resistance value between VRl and αC, and the combined resistance of VH2 and R2.
ＶＨ２で中間タップＣ点の電圧を決定し、Ｒ３で力点の
電圧を決定する。VH2 determines the voltage at the intermediate tap point C, and R3 determines the voltage at the power point.
仕向紺により異なるが、０点は１６〜２ＱＶ、／！＋点
は１．５〜５ｖ程度である。It varies depending on the destination navy blue, but 0 points are 16 to 2 QV, /! + point is about 1.5 to 5v.
ＶＨ時はＴＲ１がオフ、’ＩＲ２がオンするので、同調
電圧供給部の等価回路は第７図となり、ＶＨ６はＶＨ２
とＲ２であり、ＶＨ７はＶＨ５、及びｃｂ間の抵抗値と
Ｒ１とＲ３の合成抵抗である。At VH, TR1 is off and 'IR2 is on, so the equivalent circuit of the tuning voltage supply section is shown in Figure 7, and VH6 is VH2.
and R2, and VH7 is the combined resistance of the resistance value between VH5 and cb, and R1 and R3.
Ｕ時の０点の電圧を決定するＶＲｌにより、■１（時の
０点の電圧が決定され、ＶＨ３により中間りツブＣ点の
電圧が決定される。VR1, which determines the voltage at the 0 point at the time U, determines the voltage at the 0 point at the time (1), and VH3 determines the voltage at the intermediate point C.
仕向地により異なるが、α点は２２〜２４■、０点は２
．５〜５■程度である。Although it varies depending on the destination, α points are 22 to 24 ■, and 0 points are 2
．． It is about 5-5■.
Ｕ時はＴＲ’１がオン、ＴＲ２がオフするので、同調′
亀圧供給部の等価回路は第８図′となり、ＶＨ６はＶＨ
２とＲ２であり、ｖＬ８はＶＨ４とＲ４である。At U time, TR'1 is on and TR2 is off, so tuning'
The equivalent circuit of the tortoise pressure supply section is shown in Figure 8', where VH6 is VH
2 and R2, and vL8 is VH4 and R4.
ＶＲＩでα点の電圧を決定し、Ｒ１で６点の電圧を決定
する、更にＶＨ４により中間タップＣ点の電圧を決定す
る。VRI determines the voltage at point α, R1 determines the voltage at six points, and VH4 determines the voltage at intermediate tap point C.
仕向地をこより異なるが、α点は２３〜２８Ｖ、Ａ点は
０．５〜２Ｖ程度である。Although the destination is different, the α point is about 23 to 28V, and the A point is about 0.5 to 2V.
次にＵ時の指針ズレを改善する機能について説明する。Next, a function for improving the misalignment of the pointer at U time will be explained.
チューナに一般的に用いられる可変容量素子はバラクタ
−ダイオードであり、その電圧対容量特性は第９図の如
くである。A variable capacitance element commonly used in tuners is a varactor diode, whose voltage versus capacitance characteristics are as shown in FIG.
ＶＨ２５Ｖの容量０２Ｂは、ダイオードの生産工程の管
理により狭い範囲にあり、テレビ用では、２．０〜２．
３ＰＦ又は２．２〜２．５ＰＦである。The capacity 02B of VH25V is within a narrow range due to the control of the diode production process, and for TVs, it is 2.0 to 2.
3PF or 2.2-2.5PF.
バラクタ−ダイオードの母集団のバラツキは、０１８〜
Ｃ，にかげて大きくなるが、第９図の０部は、容量可変
比Ｎは大きいが、等価直列抵抗ｒＳが大きく、６部はｒ
ｓは小さいがＮも小さく、いずれも選局用ではなく、Ａ
ＦＴ用等の別品種のバラクタ−ダイオードとなる。The variation in the population of varactor diodes is 018~
9, the capacitance variable ratio N is large, but the equivalent series resistance rS is large, and the 6th section is r
s is small, but N is also small, and both are not for channel selection, but A
This is a different type of varactor diode for FT, etc.
従って、周波数は同調容量の平方根に反比例するので、
同調電圧Ｉｏｖ付近の中域が最もバラツキが大きくなる
。Therefore, since the frequency is inversely proportional to the square root of the tuning capacitance,
The variation is greatest in the middle range near the tuning voltage Iov.
周波数可変幅の大きなＵでは、高域、低域を可変抵抗素
子により指針を合わせても、チー−すの同調電圧のバラ
ツキにより、中域での指針ズレが±３チャンネル程度あ
った。With U, which has a large frequency variable width, even if the high and low frequencies were aligned using a variable resistance element, there was a deviation of about ±3 channels in the middle range due to variations in the tuning voltage of the channels.
本発明第５図の回路では、ＶＨ４によりＵ時の同調電圧
特性が第１０図のｉ＆こ変化するので・Ｕ全域で指針ズ
レを±０，５〜１チャンネルとすることが可能である。In the circuit shown in FIG. 5 of the present invention, the tuning voltage characteristic at U changes as shown in FIG.
以下に実験結果を記す、実験回路は＠１１図である。The experimental circuit whose experimental results are described below is shown in Figure @11.
可変抵抗素子は全抵抗２００にΩ、中間タップ位置６０
％のものである。The variable resistance element has a total resistance of 200Ω and a middle tap position of 60Ω.
%belongs to.
これはＶＬとＶＨのチャンネル数の差を考慮して、ｖＬ
とＶＨ間の選局感触の差を更に改善し、合わせてＵ時の
中間タップ位置を、同調電圧のノくラツキが最も大きい
１０Ｖ付近にする為である。This takes into account the difference in the number of channels between VL and VH, and
This is to further improve the difference in tuning feel between VH and VH, and to set the middle tap position at U to around 10V, where the tuning voltage fluctuation is greatest.
この実験回路の設計に用いたチー−すの同調電圧特性は
表１であり、実験回路の同；１１気圧調整範囲は表２で
ある。Table 1 shows the tuning voltage characteristics of the wheels used in the design of this experimental circuit, and Table 2 shows the 11 atmospheric pressure adjustment range of the experimental circuit.
（Ｖ Ｌ ） ０１１１ ａ Ｏ〜６．ＯｖＯｈ ３
１７．０〜１５． ＯＶ
（Ｖ Ｈ） Ｏｈ ４ ６．５− ４．５ ＶＯｈ１２
２０．７〜１９．３Ｖ
（Ｕ ） ０ｈ１３２．５〜１．５Ｖ
Ｏｈ３０ １５．５〜９．５■
０ｈ６２ ２５．５〜２４．５ Ｖ
表 １
（ＶＬ） Ｖｂ ５．１ ６− ４．５７ＶＶ ｃ ２
２． ３ ６ 〜１ ９． ７ ９ Ｖ（ＶＨ） Ｖ
ｃ ’５．１８− ０．６５ＶＶ（Ｚ ２７．９４−２
４．６ １’Ｖ（Ｕ）Ｖ ｂ １．５３〜 ０．９ ９
ＶＶ Ｃ１３，７３−８，９２Ｖ
Ｖ ａ ２ ８． ６ ３ 〜２ ６． ３ ６ Ｖ表
２
〔効 果〕
以上述べた様に、本発明は下記の効果を有する（ｆ）部
品点数を本発明実施し１〕と、従来ヅ］で比較すると、
ダイオード２石、トランジスタ２石、抵抗４本が減少し
、増加したのはボリューム１点であり、コストダウンと
スペースの節約に大きく寄与する。(V L ) 0111 a O~6. OvOh 3
17.0-15. OV (VH) Oh 4 6.5- 4.5 VOh12
20.7~19.3V (U) 0h132.5~1.5V Oh30 15.5~9.5■ 0h62 25.5~24.5V Table 1 (VL) Vb 5.1 6- 4.57VV c 2
2. 3 6 ~ 1 9. 7 9 V (VH) V
c'5.18-0.65VV(Z 27.94-2
4.6 1'V(U)V b 1.53~ 0.9 9
VV C13,73-8,92V V a 2 8. 6 3 ~ 2 6. 3 6 V Table 2 [Effects] As stated above, the present invention has the following effects. (f) Comparing the number of parts between the present invention (1) and the conventional (2):
The number of diodes, two transistors, and four resistors has been reduced, and the volume has increased by one point, greatly contributing to cost reduction and space savings.
（、ｙ）ｍ能を比較すると、従来列と同等の機能を有し
、更にｔＴＨＦ時に中間タップの電圧を可変できる機能
を有し、ＵＫ？時の選局表示部の指針のズレを、従来Ｆ
ｌｌの最大±３チャンネル程度から、最大±１チャンネ
ル程度へ改善することができる(,y) Comparing the functions, it has the same function as the conventional column, and also has the function of varying the intermediate tap voltage at tTHF. Conventional F
It is possible to improve from the maximum of ±3 channels of ll to the maximum of ±1 channel.
第１図は従来のテレビ用選局回路の構成図。
（１）・・・・・・バンドスイッチ
（２）・・・・・・可変抵抗素子
第２図は第１図の選局表示部し１］。
第６図は中間タップとスイッチング素子対の可変抵抗素
子を用いた、従来のテレビ用選局回路の実施例。
（１）・・・・・・バンドスイッチ
（２）・・・・・・中間タップとスイッチング素子付可
変抵抗素子
第４図は第３図の辿局表示部し１」。
第５図は本発明の実施し’Ｊ。
（１）・・・・・・バンドスイッチ
（２）・・・・・・中間タップとスイッチング素子付可
変抵抗素子
第６図は本発明ＶＨＦ低バンドの、同調電圧供給部の等
価回路。
第７図は本発明ＶＨＦ高バンドの、同調電圧供給部の等
価回路。
第８図は本発明ＵＨＥ’の、同調電圧供給部の等価回路
。
第９図はバラクタ−ダイオードの、電圧対容量特性。
第１０図は本発明のＵＨＦの指示ズレを補正する機能の
説明図。
第１１図は本発明の実施列に基づく、実験回路第１２図
は第１１図の選局表示部。
以 上
出願人 株式会社諏訪精工舎
代理人 弁理士 最上 務
第１図
第２図
第３図
第４図
第５図
第６図
第７図
第８図
四ν〔Ｖｏｘり
第９図
０ ’） ＩＣ） ｌ！； ２０ ；ｇａ＝＠王＝、ｘ
＋ｊ
第１０図
第１１図
第１２図FIG. 1 is a block diagram of a conventional television channel selection circuit. (1)...Band switch (2)...Variable resistance element Figure 2 is the channel selection display section of Figure 1]. FIG. 6 shows an example of a conventional television channel selection circuit using a variable resistance element as a center tap and a pair of switching elements. (1) Band switch (2) Variable resistance element with intermediate tap and switching element Figure 4 is the station tracking display section of Figure 3. FIG. 5 shows the implementation of the present invention. (1) Band switch (2) Variable resistance element with intermediate tap and switching element Figure 6 is an equivalent circuit of the tuning voltage supply section of the VHF low band according to the present invention. FIG. 7 is an equivalent circuit of the VHF high band tuning voltage supply section of the present invention. FIG. 8 is an equivalent circuit of the tuning voltage supply section of the UHE' of the present invention. Figure 9 shows the voltage vs. capacitance characteristics of a varactor diode. FIG. 10 is an explanatory diagram of the function of correcting the UHF indication deviation of the present invention. FIG. 11 is an experimental circuit based on the implementation column of the present invention. FIG. 12 is the channel selection display section of FIG. Applicant: Suwa Seikosha Co., Ltd. Agent Patent Attorney: Tsutomu Mogami Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 4v [Voxed Figure 9 0'] IC) l! ;20;ga=@king=,x
+j Figure 10 Figure 11 Figure 12
Claims (2)
に同期して中間タップ付近で切換わるスイッチング素子
からなる、同調電圧供給素子を用いたテレビ用選局回路
において１．中間タップと可変抵抗素子の一端に並列に
抵抗素子を接続し、ＶＨＦ高バンド用電源電圧を用いて
中間タップを低抵抗とすることにより、この区間をＶＨ
Ｆ高バンド用同調電圧発生回路とし、一方の区間をＶＨ
Ｆ低バンド用同調電圧発生回路とし、更にＵＨＦ用電源
電圧を用いて双方の区間の抵抵値の不均衡を是正して、
双方の区間をＵＨＦ用同調電圧発生回路とすることを特
徴とするテレビ用選局回路。(1) In a TV channel selection circuit using a tuned voltage supply element consisting of a variable resistance element having a center tap and a switching element that switches near the center tap in synchronization with the slider of the variable resistance element, 1. By connecting a resistance element in parallel to the intermediate tap and one end of the variable resistance element, and making the intermediate tap low resistance using the VHF high band power supply voltage, this section can be set to VH.
F high band tuning voltage generation circuit, one section is VH
The F low band tuning voltage generation circuit is used, and the UHF power supply voltage is used to correct the imbalance in resistance values in both sections.
A television channel selection circuit characterized in that both sections are UHF tuning voltage generation circuits.
是正する回路に可変抵抗素子を用い、ＵＨＦチューナの
同調電圧特性のバラツキを補正することを特徴とする特
許請求の範囲第（１）項記載のテレビ用選局回路。(2) A variable resistance element is used in a circuit that corrects the imbalance in resistance values between both sections of the variable resistance element, and the variation in the tuning voltage characteristics of a UHF tuner is corrected. ) The television channel selection circuit described in item ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP247784A JPS60146520A (en) | 1984-01-10 | 1984-01-10 | Channel selection circuit for television set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP247784A JPS60146520A (en) | 1984-01-10 | 1984-01-10 | Channel selection circuit for television set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60146520A true JPS60146520A (en) | 1985-08-02 |
Family
ID=11530416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP247784A Pending JPS60146520A (en) | 1984-01-10 | 1984-01-10 | Channel selection circuit for television set |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60146520A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05304637A (en) * | 1987-01-21 | 1993-11-16 | Rca Thomson Licensing Corp | Television receiver |
-
1984
- 1984-01-10 JP JP247784A patent/JPS60146520A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05304637A (en) * | 1987-01-21 | 1993-11-16 | Rca Thomson Licensing Corp | Television receiver |
| JP2891603B2 (en) * | 1987-01-21 | 1999-05-17 | アールシーエー トムソン ライセンシング コーポレイシヨン | Television receiver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4186360A (en) | Digital channel selecting apparatus | |
| US6108050A (en) | Television tuner | |
| JPS60146520A (en) | Channel selection circuit for television set | |
| CN107733399A (en) | Active band-pass filter circuit with adjustable resistor device and adjustable condenser device | |
| JPS6348205B2 (en) | ||
| JPH0328095B2 (en) | ||
| GB2215929A (en) | Electronic tuners | |
| US7349034B2 (en) | Television tuner using integrated circuit | |
| JPS58143624A (en) | Method and device for channel selection of electronic tuner circuit | |
| JPS6138287Y2 (en) | ||
| KR100328492B1 (en) | Three band tracking filter for digital satellite broadcasting tuner | |
| KR910000106Y1 (en) | Seperating control circuit for vhf tuning voltage | |
| JP2661002B2 (en) | Intermediate frequency filter circuit and method of manufacturing the same | |
| JP2525443Y2 (en) | Tuner circuit | |
| JPH0136357Y2 (en) | ||
| JPS6141311Y2 (en) | ||
| JPS5821224Y2 (en) | electronic tuner | |
| JPS6216025Y2 (en) | ||
| JPH0718191Y2 (en) | Electronic tuning tuner input circuit | |
| JPH0339940Y2 (en) | ||
| KR900008100Y1 (en) | Tuning voltage supplying circuit | |
| JPS6230337Y2 (en) | ||
| KR900010801Y1 (en) | Drift frequency compensation circuit of tuner | |
| JPS60162307A (en) | Aft circuit of television receiver | |
| KR870000318B1 (en) | Channel synchronizing voltage producing circuit of television |