JPS5821214Y2 - Stereo low frequency amplifier - Google Patents
Stereo low frequency amplifierInfo
- Publication number
- JPS5821214Y2 JPS5821214Y2 JP1977166490U JP16649077U JPS5821214Y2 JP S5821214 Y2 JPS5821214 Y2 JP S5821214Y2 JP 1977166490 U JP1977166490 U JP 1977166490U JP 16649077 U JP16649077 U JP 16649077U JP S5821214 Y2 JPS5821214 Y2 JP S5821214Y2
- Authority
- JP
- Japan
- Prior art keywords
- low frequency
- frequency amplifier
- channel
- power supply
- stereo
- 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.)
- Expired
Links
Landscapes
- Stereophonic Arrangements (AREA)
- Amplifiers (AREA)
Description
【考案の詳細な説明】
本考案はステレオ用低周波増幅器、とくに高忠実度のス
テレオ再生装置に使用される回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stereo low frequency amplifier, particularly to a circuit used in a high-fidelity stereo reproduction device.
ステレオ用低周波前置増幅器、あるいは電力増幅器の左
右両チャンネル間の相互に及ぼす影響については従前よ
り論じられており、例えば入力側と出力側との共通イン
ピーダンスを形成する部分の存在のために、一方のチャ
ンネルの出力の一部が電源を通して他チャンネルの入力
側にフィードバックしてセパレーションの低下を生じさ
せたり、又、一方のチャンネルの出力の一部が電源およ
び他チャンネルの回路を介して自己チャンネルの入力側
にフィードバックして歪率を増加させたりする。The mutual influence between the left and right channels of a stereo low-frequency preamplifier or a power amplifier has been discussed for some time.For example, due to the existence of a part that forms a common impedance between the input side and the output side, Part of the output of one channel may be fed back to the input side of the other channel through the power supply, causing a reduction in separation, or part of the output of one channel may be fed back to the input side of the other channel through the power supply and the circuit of the other channel. feedback to the input side of the signal to increase the distortion rate.
これを防止するため、左右両チャンネルにそれぞれ独立
した電源を設けて配線を全く分離して相互の影響を減少
させたり、各回路部品の接地点を理論的に最も相互干渉
の少い位置を求めてそのために広いスペースを占有させ
たり、あるいはかなり太い銅棒を装置内のアース線に用
いて抵抗値を減少させ、上記の効果を得ようとするなど
の工夫がなされているが、いずれもかなりスペースを必
要としたり、コスト高となったりするものであった。In order to prevent this, we installed independent power supplies for both left and right channels and completely separated the wiring to reduce mutual influence, and we also determined the grounding point of each circuit component to be theoretically located at a position where there is the least mutual interference. For this purpose, various methods have been used to achieve the above effect, such as occupying a large space or using a fairly thick copper rod as the ground wire inside the device to reduce the resistance value. This requires space and is expensive.
本考案においては、左右両チャンネル用の２系統の増幅
器１，２に対し共通の１個の直流供給電源３を設け、こ
の電源３からそれぞれの増幅器への供給ラインに対し直
列にチョークコイル４，５゜を挿入し、並列にコンデン
サ６．７を設けて、それぞれ逆り型のろ波器を形成させ
る。In the present invention, a common DC power supply 3 is provided for the two amplifiers 1 and 2 for both left and right channels, and a choke coil 4 is connected in series to the supply line from this power supply 3 to each amplifier. 5° and connect capacitors 6 and 7 in parallel to form inverted filters.
このようにすることにより電源３が共通であっても、各
チャンネルからの出力が、他チャンネルあるいは自己チ
ャンネルの入力へフィードバックすることがろ波器によ
り阻止されて、歪率及びセパレーションの悪化を防ぐこ
とが出来る。By doing this, even if the power supply 3 is common, the output from each channel is prevented from being fed back to the input of other channels or its own channel by the filter, thereby preventing deterioration of distortion rate and separation. I can do it.
チョークコイル４，５．コンデンサ６．７の各数値は、
改善しようとする周波数帯域によって選択することがで
きる。Choke coil 4, 5. Each value of capacitor 6.7 is
It can be selected depending on the frequency band to be improved.
以上のように、本考案によれば、左右両チャンネルの増
幅回路に対する１個の直流電源との接続部に、それぞれ
チョークコイルとコンデンサとより成る逆り型のろ波器
を挿入したので、各チャンネルの出力が他チャンネルあ
るいは自己チャンネルにフィードバックして歪率を増加
させたり、セパレーションを低下させたりするのを防止
することができ、高忠実度低周波増幅器に用いてその実
用的効果は犬なるものがある。As described above, according to the present invention, inverted filters each consisting of a choke coil and a capacitor are inserted into the connections between the left and right channel amplifier circuits and one DC power supply. It can prevent the output of a channel from feeding back to other channels or its own channel, increasing the distortion rate or decreasing the separation, and its practical effect is great when used in high-fidelity low-frequency amplifiers. There is something.
第１図は従来例の回路図、第２図は本考案の実施例で、
図面中１，２は増幅器、３は電源、４゜５はチョークコ
イル、６，７はコンデンサである。Figure 1 is a circuit diagram of a conventional example, Figure 2 is an embodiment of the present invention,
In the drawing, 1 and 2 are amplifiers, 3 is a power supply, 4.5 is a choke coil, and 6 and 7 are capacitors.
Claims (1)
個の直流電源との接続部に左右両チャンネルについてそ
れぞれ独立にチョークコイルとコンデンサとより成る逆
り型の濾波器を挿入したことを特徴とするステレオ用低
周波増幅器。1 that supplies power to each amplifier circuit for both left and right channels
A stereo low frequency amplifier characterized in that an inverted filter consisting of a choke coil and a capacitor is inserted independently for both left and right channels at the connection part with a direct current power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977166490U JPS5821214Y2 (en) | 1977-12-13 | 1977-12-13 | Stereo low frequency amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977166490U JPS5821214Y2 (en) | 1977-12-13 | 1977-12-13 | Stereo low frequency amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5492147U JPS5492147U (en) | 1979-06-29 |
| JPS5821214Y2 true JPS5821214Y2 (en) | 1983-05-06 |
Family
ID=29165837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1977166490U Expired JPS5821214Y2 (en) | 1977-12-13 | 1977-12-13 | Stereo low frequency amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5821214Y2 (en) |
-
1977
- 1977-12-13 JP JP1977166490U patent/JPS5821214Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5492147U (en) | 1979-06-29 |
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