JPS61172422A - Booster - Google Patents
BoosterInfo
- Publication number
- JPS61172422A JPS61172422A JP60012892A JP1289285A JPS61172422A JP S61172422 A JPS61172422 A JP S61172422A JP 60012892 A JP60012892 A JP 60012892A JP 1289285 A JP1289285 A JP 1289285A JP S61172422 A JPS61172422 A JP S61172422A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- capacitor
- channel
- circuit
- inductance
- 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.)
- Granted
Links
Landscapes
- Filters And Equalizers (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (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ＴＶ共聴用に使用し、周波数特性調整装ＷＩｉ
ヲ具備したブースターに関するものである。Detailed Description of the Invention (Technical Field) The present invention is a frequency characteristic adjustment device WIi used for TV shared listening.
This is related to a booster equipped with
（背景技術）
従来のＴＶ共聴用ブースターの利得調整回路は周波数特
性は平坦で、全周波数帯域の利得を変化させるものであ
った。この利得調整回路により、最大定格出力以上にあ
るチャンネルの信号出力レベルがあがった場合に、利得
を下げ、歪の発生を妨ぐのである。しかし、複数の信号
の最も大きなレベルの信号を最大定格出力まで下げた場
合、低いレベルの信号はよりレベルが低くなる。チャン
ネル間のレペμの差はアンテナ出力のハイドパターン等
が地理的影響により生じ、妨ぐことのできないものであ
る。したがってＴＶ受像機では、チヤツキＡ／によって
は良好な映像をうつし出すことができなくなる可能性が
ある。(Background Art) Conventional gain adjustment circuits for TV public listening boosters have flat frequency characteristics and change the gain over the entire frequency band. This gain adjustment circuit lowers the gain when the signal output level of a channel rises above the maximum rated output to prevent distortion from occurring. However, when the highest level signal of the plurality of signals is lowered to the maximum rated output, the lower level signals become lower in level. The difference in rep μ between channels is caused by the geographical influence of the hide pattern of the antenna output, and cannot be prevented. Therefore, the TV receiver may not be able to display good images depending on the chuck A/.
第１図に各チャンネルの信号Ｖぺμの差を示すスペクト
μの例を示す。FIG. 1 shows an example of the spectrum μ indicating the difference between the signals Vpeμ of each channel.
（発明の目的）
本発明の目的は、ＴＶ共聴用ブースターにおいて、各チ
ャンネルの出力レペ〃を均一にして出力する。周波数特
性調整装置を具備したブースターを提供することにある
。(Object of the Invention) An object of the present invention is to uniformly output the output repetition of each channel in a TV public viewing booster. An object of the present invention is to provide a booster equipped with a frequency characteristic adjustment device.
（発明の開示］
以下この発明を一実施例として示した第２図乃至第５図
に基づいて説明する。ブースターの回路ブロック図を示
す第２図において、１は入力端子、２．８はバンドバス
フィμりｓｓ、ａ、ｒは広帯域増幅回路、４は可変減衰
回路、６は周波数特性調整装置、９は出力端子である。(Disclosure of the Invention) The present invention will be explained below based on FIGS. 2 to 5 showing one embodiment. In FIG. 2 showing a circuit block diagram of a booster, 1 is an input terminal, 2.8 is a band Reference numerals ss, a, and r represent wideband amplifier circuits, 4 is a variable attenuation circuit, 6 is a frequency characteristic adjustment device, and 9 is an output terminal.
第３図に周波数調整装Ｒ５の具体回路例を示すと、１０
は入力端子、Ｕは出力端子、捻はインダクタンス、認は
コンデンサ、１４は抵抗である。第２図における回路で
はインダクタンスνとコンデンサ口の直列共振周波数に
おいて減衰量が最大となる。その周波数はコンデンサ口
の容量を変えることにより変化させることができる。減
衰量最大の周波数を、信号レペ〃が最も扁いチャンネル
の周波数に合わせることにより、各チャンネルのレベル
差を小さくする。第４図は第３図の回路の具体回路であ
る。■は直流カット用コンデンサ、坊は可変容量ダイオ
ード、１７はチョークコイμ、迅は可変電圧源である。FIG. 3 shows a specific circuit example of the frequency adjustment device R5.
is an input terminal, U is an output terminal, screw is an inductance, letter is a capacitor, and 14 is a resistance. In the circuit shown in FIG. 2, the amount of attenuation is maximum at the series resonance frequency between the inductance ν and the capacitor port. The frequency can be changed by changing the capacitance of the capacitor port. By matching the frequency with the maximum amount of attenuation to the frequency of the channel with the lowest signal repetition, the level difference between each channel is reduced. FIG. 4 shows a concrete circuit of the circuit shown in FIG. ■ is a DC cut capacitor, Bo is a variable capacitance diode, 17 is a choke coil μ, and Jin is a variable voltage source.
凪の電圧を変えることにより可変容量ダイオード１６の
容量を変え、可変容量ダイオード１６とインダクタンス
νの直列共振周波数を変える。第５図に第３図の回路の
伝送量の特性を示す。By changing the calm voltage, the capacitance of the variable capacitance diode 16 is changed, and the series resonance frequency of the variable capacitance diode 16 and the inductance ν is changed. FIG. 5 shows the transmission amount characteristics of the circuit shown in FIG.
第６図乃至第８図は周波数調整装置５の他の実施例を示
すものであり、１９はインダクタンス、田はコンデンサ
である。この回路では、インダクタンス１９とコンデン
サ加の並列共振周波数において減衰量が最大となる。そ
の周波数はコンデンサ加の容量を変えることにより、変
化させることができる。減衰量最小の周波数を、信号レ
ベルが最も高いチャンネルの周波数に合わせることによ
り、各チャンネルのレベル差を小さくする。第７図は具
体回路である。乞は可変容量ダイオードであり、この容
量値を印加電圧により変えることＫより、インダクタン
ス１９と可変容量ダイオ−ドラの並列共振周波数を変化
させる。第８図に第６図の回路の伝送量の特性を示す。6 to 8 show other embodiments of the frequency adjustment device 5, where 19 is an inductance and 1 is a capacitor. In this circuit, the amount of attenuation is maximum at the parallel resonance frequency of the inductance 19 and the capacitor. The frequency can be changed by changing the capacitance of the capacitor. By matching the frequency with the minimum amount of attenuation to the frequency of the channel with the highest signal level, the level difference between each channel is reduced. FIG. 7 shows a concrete circuit. This is a variable capacitance diode, and by changing the capacitance value by changing the applied voltage, the parallel resonance frequency of the inductance 19 and the variable capacitance diode is changed. FIG. 8 shows the transmission amount characteristics of the circuit of FIG. 6.
そして、第３図と第６図の回路の周波数特性における尖
鋭度Ｑを変化させたい場合には抵抗１４の抵抗値を変え
ればよい。具体的にはＰｉｎダイオードに抵抗１４をお
きかえ、その順方向電流を変えることにより、抵抗値の
変化は容ＡＫ５ｊ！現できる。If it is desired to change the sharpness Q in the frequency characteristics of the circuits shown in FIGS. 3 and 6, the resistance value of the resistor 14 may be changed. Specifically, by replacing the resistor 14 with a Pin diode and changing its forward current, the change in resistance value can be reduced by the capacity AK5j! can be expressed.
以上の２種の回路を第２図のブースターの周波数特性調
整装Ｒ６として用いれば、ブースターの８力の各チヤツ
キμのレベルのバラツキをおさえることができる。If the above two types of circuits are used as the frequency characteristic adjustment device R6 of the booster shown in FIG. 2, it is possible to suppress variations in the level of each of the booster's eight forces.
第９回置とＩＢ＋も他の実施例を示し、第３図の回路と
第６図の回路の切換は第９図に示すスイッチの付いた回
路で実現できる。したがって、チャンネルのレベルのパ
フツキがどのようなものであっても対応できる。スイッ
チ隅、隅、隅はダイオードスイッチで実現できる。9th position and IB+ also show other embodiments, and switching between the circuit of FIG. 3 and the circuit of FIG. 6 can be realized by a circuit equipped with a switch shown in FIG. 9. Therefore, it is possible to deal with any type of channel level puffiness. The switch corner, corner, corner can be realized with a diode switch.
（発明の効果）
この発明は以上説明した通り、従来のブースターでは各
チャンネルの信号レベルのバラツキをおさえることがで
きなかったのが、本発明によるブースターでは、周波数
特性調整装置６を備えているために各チャンネルの信号
レベルがプーヌター出力では均一にして出力されるため
、ＴＶ受像機でチヤツキ／Ｉ／によっては映像が悪いと
いうことがないという多大な効果を有するブースターが
得られる。(Effects of the Invention) As explained above, the conventional booster could not suppress the variation in the signal level of each channel, but the booster according to the present invention is equipped with the frequency characteristic adjustment device 6. In addition, since the signal level of each channel is made uniform in the Poonuta output, a booster is obtained which has a great effect in that the image will not be degraded by the flicker/I/ on the TV receiver.
第１図は各チヤツキ〃の信号とレベルを示すグラフ、第
２図は本発明によるブースターのプロ。
り図、第３図、第６図は本発明による周波数特性調整装
置の回路図、第４図、第７図は第３図、第図の回路をス
イッチを用いるととｋより切り換えることができるよう
にした回路図である。
１ ：入力端子、２ 、８ ：バンドパスフィルタ、３
．６．７は広帯域増幅回路、４：可変減衰回路、５：周
波数特性調整装置、９：出力端子、認、１９：インダク
タンス、Ｌ（，２０：コンデンサ。Figure 1 is a graph showing the signals and levels of each jack, and Figure 2 is a professional booster according to the present invention. Figures 3 and 6 are circuit diagrams of the frequency characteristic adjustment device according to the present invention, and Figures 4 and 7 show that the circuits in Figures 3 and 7 can be switched by using a switch. FIG. 1: Input terminal, 2, 8: Band pass filter, 3
．． 6.7 is a broadband amplifier circuit, 4: variable attenuation circuit, 5: frequency characteristic adjustment device, 9: output terminal, 19: inductance, L(, 20: capacitor.
Claims (1)
共振回路の一端を信号ラインに接続し、他端を抵抗を介
して接地した周波数特性調整装置を備えたことを特徴と
するＴＶ共聴用のブースター。(1) A booster for TV listening, characterized in that it is equipped with a frequency characteristic adjustment device in which one end of a parallel or series resonant circuit of an inductance and a capacitor is connected to a signal line, and the other end is grounded via a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60012892A JPS61172422A (en) | 1985-01-25 | 1985-01-25 | Booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60012892A JPS61172422A (en) | 1985-01-25 | 1985-01-25 | Booster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61172422A true JPS61172422A (en) | 1986-08-04 |
| JPH0544849B2 JPH0544849B2 (en) | 1993-07-07 |
Family
ID=11818044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60012892A Granted JPS61172422A (en) | 1985-01-25 | 1985-01-25 | Booster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61172422A (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005286893A (en) * | 2004-03-30 | 2005-10-13 | Murata Mfg Co Ltd | Passband flatness compensation circuit and filter |
| US9704670B2 (en) | 2013-09-30 | 2017-07-11 | Apple Inc. | Keycaps having reduced thickness |
| US9704665B2 (en) | 2014-05-19 | 2017-07-11 | Apple Inc. | Backlit keyboard including reflective component |
| US9710069B2 (en) | 2012-10-30 | 2017-07-18 | Apple Inc. | Flexible printed circuit having flex tails upon which keyboard keycaps are coupled |
| US9715978B2 (en) | 2014-05-27 | 2017-07-25 | Apple Inc. | Low travel switch assembly |
| US9761389B2 (en) | 2012-10-30 | 2017-09-12 | Apple Inc. | Low-travel key mechanisms with butterfly hinges |
| US9779889B2 (en) | 2014-03-24 | 2017-10-03 | Apple Inc. | Scissor mechanism features for a keyboard |
| US9793066B1 (en) | 2014-01-31 | 2017-10-17 | Apple Inc. | Keyboard hinge mechanism |
| US9870880B2 (en) | 2014-09-30 | 2018-01-16 | Apple Inc. | Dome switch and switch housing for keyboard assembly |
| US9908310B2 (en) | 2013-07-10 | 2018-03-06 | Apple Inc. | Electronic device with a reduced friction surface |
| US9916945B2 (en) | 2012-10-30 | 2018-03-13 | Apple Inc. | Low-travel key mechanisms using butterfly hinges |
| US9927895B2 (en) | 2013-02-06 | 2018-03-27 | Apple Inc. | Input/output device with a dynamically adjustable appearance and function |
| US9934915B2 (en) | 2015-06-10 | 2018-04-03 | Apple Inc. | Reduced layer keyboard stack-up |
| US9971084B2 (en) | 2015-09-28 | 2018-05-15 | Apple Inc. | Illumination structure for uniform illumination of keys |
| US10002727B2 (en) | 2013-09-30 | 2018-06-19 | Apple Inc. | Keycaps with reduced thickness |
| US10083806B2 (en) | 2015-05-13 | 2018-09-25 | Apple Inc. | Keyboard for electronic device |
| US10082880B1 (en) | 2014-08-28 | 2018-09-25 | Apple Inc. | System level features of a keyboard |
| US10115544B2 (en) | 2016-08-08 | 2018-10-30 | Apple Inc. | Singulated keyboard assemblies and methods for assembling a keyboard |
| US10128064B2 (en) | 2015-05-13 | 2018-11-13 | Apple Inc. | Keyboard assemblies having reduced thicknesses and method of forming keyboard assemblies |
| US10262814B2 (en) | 2013-05-27 | 2019-04-16 | Apple Inc. | Low travel switch assembly |
| US10353485B1 (en) | 2016-07-27 | 2019-07-16 | Apple Inc. | Multifunction input device with an embedded capacitive sensing layer |
| US10468211B2 (en) | 2015-05-13 | 2019-11-05 | Apple Inc. | Illuminated low-travel key mechanism for a keyboard |
| US10755877B1 (en) | 2016-08-29 | 2020-08-25 | Apple Inc. | Keyboard for an electronic device |
| US10775850B2 (en) | 2017-07-26 | 2020-09-15 | Apple Inc. | Computer with keyboard |
| US10796863B2 (en) | 2014-08-15 | 2020-10-06 | Apple Inc. | Fabric keyboard |
| US11500538B2 (en) | 2016-09-13 | 2022-11-15 | Apple Inc. | Keyless keyboard with force sensing and haptic feedback |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006352792A (en) * | 2005-06-20 | 2006-12-28 | Hochiki Corp | Signal amplifier |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54177255U (en) * | 1978-06-01 | 1979-12-14 | ||
| JPS56176519U (en) * | 1980-05-29 | 1981-12-26 |
-
1985
- 1985-01-25 JP JP60012892A patent/JPS61172422A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54177255U (en) * | 1978-06-01 | 1979-12-14 | ||
| JPS56176519U (en) * | 1980-05-29 | 1981-12-26 |
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005286893A (en) * | 2004-03-30 | 2005-10-13 | Murata Mfg Co Ltd | Passband flatness compensation circuit and filter |
| US10254851B2 (en) | 2012-10-30 | 2019-04-09 | Apple Inc. | Keyboard key employing a capacitive sensor and dome |
| US9710069B2 (en) | 2012-10-30 | 2017-07-18 | Apple Inc. | Flexible printed circuit having flex tails upon which keyboard keycaps are coupled |
| US10211008B2 (en) | 2012-10-30 | 2019-02-19 | Apple Inc. | Low-travel key mechanisms using butterfly hinges |
| US9761389B2 (en) | 2012-10-30 | 2017-09-12 | Apple Inc. | Low-travel key mechanisms with butterfly hinges |
| US9916945B2 (en) | 2012-10-30 | 2018-03-13 | Apple Inc. | Low-travel key mechanisms using butterfly hinges |
| US10114489B2 (en) | 2013-02-06 | 2018-10-30 | Apple Inc. | Input/output device with a dynamically adjustable appearance and function |
| US9927895B2 (en) | 2013-02-06 | 2018-03-27 | Apple Inc. | Input/output device with a dynamically adjustable appearance and function |
| US10262814B2 (en) | 2013-05-27 | 2019-04-16 | Apple Inc. | Low travel switch assembly |
| US9908310B2 (en) | 2013-07-10 | 2018-03-06 | Apple Inc. | Electronic device with a reduced friction surface |
| US10556408B2 (en) | 2013-07-10 | 2020-02-11 | Apple Inc. | Electronic device with a reduced friction surface |
| US10002727B2 (en) | 2013-09-30 | 2018-06-19 | Apple Inc. | Keycaps with reduced thickness |
| US9704670B2 (en) | 2013-09-30 | 2017-07-11 | Apple Inc. | Keycaps having reduced thickness |
| US10224157B2 (en) | 2013-09-30 | 2019-03-05 | Apple Inc. | Keycaps having reduced thickness |
| US9793066B1 (en) | 2014-01-31 | 2017-10-17 | Apple Inc. | Keyboard hinge mechanism |
| US9779889B2 (en) | 2014-03-24 | 2017-10-03 | Apple Inc. | Scissor mechanism features for a keyboard |
| US9704665B2 (en) | 2014-05-19 | 2017-07-11 | Apple Inc. | Backlit keyboard including reflective component |
| US9715978B2 (en) | 2014-05-27 | 2017-07-25 | Apple Inc. | Low travel switch assembly |
| US10796863B2 (en) | 2014-08-15 | 2020-10-06 | Apple Inc. | Fabric keyboard |
| US10082880B1 (en) | 2014-08-28 | 2018-09-25 | Apple Inc. | System level features of a keyboard |
| US10134539B2 (en) | 2014-09-30 | 2018-11-20 | Apple Inc. | Venting system and shield for keyboard |
| US9870880B2 (en) | 2014-09-30 | 2018-01-16 | Apple Inc. | Dome switch and switch housing for keyboard assembly |
| US10192696B2 (en) | 2014-09-30 | 2019-01-29 | Apple Inc. | Light-emitting assembly for keyboard |
| US10128061B2 (en) | 2014-09-30 | 2018-11-13 | Apple Inc. | Key and switch housing for keyboard assembly |
| US10128064B2 (en) | 2015-05-13 | 2018-11-13 | Apple Inc. | Keyboard assemblies having reduced thicknesses and method of forming keyboard assemblies |
| US10083805B2 (en) | 2015-05-13 | 2018-09-25 | Apple Inc. | Keyboard for electronic device |
| US10083806B2 (en) | 2015-05-13 | 2018-09-25 | Apple Inc. | Keyboard for electronic device |
| US10424446B2 (en) | 2015-05-13 | 2019-09-24 | Apple Inc. | Keyboard assemblies having reduced thickness and method of forming keyboard assemblies |
| US10468211B2 (en) | 2015-05-13 | 2019-11-05 | Apple Inc. | Illuminated low-travel key mechanism for a keyboard |
| US9934915B2 (en) | 2015-06-10 | 2018-04-03 | Apple Inc. | Reduced layer keyboard stack-up |
| US10310167B2 (en) | 2015-09-28 | 2019-06-04 | Apple Inc. | Illumination structure for uniform illumination of keys |
| US9971084B2 (en) | 2015-09-28 | 2018-05-15 | Apple Inc. | Illumination structure for uniform illumination of keys |
| US10353485B1 (en) | 2016-07-27 | 2019-07-16 | Apple Inc. | Multifunction input device with an embedded capacitive sensing layer |
| US10115544B2 (en) | 2016-08-08 | 2018-10-30 | Apple Inc. | Singulated keyboard assemblies and methods for assembling a keyboard |
| US10755877B1 (en) | 2016-08-29 | 2020-08-25 | Apple Inc. | Keyboard for an electronic device |
| US11500538B2 (en) | 2016-09-13 | 2022-11-15 | Apple Inc. | Keyless keyboard with force sensing and haptic feedback |
| US10775850B2 (en) | 2017-07-26 | 2020-09-15 | Apple Inc. | Computer with keyboard |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0544849B2 (en) | 1993-07-07 |
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