JPS6216014Y2 - - Google Patents
Info
- Publication number
- JPS6216014Y2 JPS6216014Y2 JP1979151647U JP15164779U JPS6216014Y2 JP S6216014 Y2 JPS6216014 Y2 JP S6216014Y2 JP 1979151647 U JP1979151647 U JP 1979151647U JP 15164779 U JP15164779 U JP 15164779U JP S6216014 Y2 JPS6216014 Y2 JP S6216014Y2
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- point
- grounding
- ground
- signal source
- 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
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
【考案の詳細な説明】 本考案はステレオ増幅器の改良に関する。[Detailed explanation of the idea] The present invention relates to improvements in stereo amplifiers.
従来のステレオ増幅器は第１図に示すように、
左右チヤンネルの信号源ＥL，ＥRをシールド線１
Ｌ，１Ｒを介して増幅器２Ｌ，２Ｒにそれぞれ入
力し、信号源ＥL，ＥRの接地点イを共通に接続す
ると共に、増幅器２Ｌ，２Ｒの接地点ハを共通に
接続してシヤーシに接地した構成を有する。 A conventional stereo amplifier, as shown in Figure 1,
Connect the signal sources E L and E R of the left and right channels to shielded wire 1
It is input to amplifiers 2L and 2R via L and 1R respectively, and the ground points A of signal sources E L and E R are connected in common, and the ground points C of amplifiers 2L and 2R are connected in common and grounded to the chassis. It has the following configuration.
ところが、シールド線１Ｌ，１Ｒはそのシール
ド線部ニ，ロが或るインピーダンスをもつてお
り、また、増幅器２Ｌ，２Ｒの接地点ハの接地電
位や接地インピーダンスのために、例えば、左チ
ヤンネルのシールド線１Ｌを介して伝送された信
号電流は増幅器２Ｌを介して接地点ハに流れ、更
に、シールド線１Ｌのシールド線部ニを経て、信
号源ＥLの接地点イに流れる。それと同時に、こ
の信号電流は上記接地点ハ、右チヤンネルのシー
ルド線１Ｒのシールド線部ロを経て、信号源ＥR
の接地点イに流れる。つまり合イ−ロ−ハ間及び
イ−ニ−ハ間の接地インピーダンスが増幅系の共
通インピーダンスとなり、左右チヤンネル間にク
ロストロークが発生する。従つて、左右チヤンネ
ル間のセパレーシヨンが劣化し、音像定位が悪く
なる欠点がある。 However, the shield wires 1L and 1R have a certain impedance at their shield wire portions 2 and 2, and due to the ground potential and ground impedance of the ground point C of the amplifiers 2L and 2R, for example, the left channel shield The signal current transmitted through the line 1L flows to the ground point C via the amplifier 2L, and further flows to the ground point A of the signal source E L via the shield line portion D of the shield line 1L. At the same time, this signal current passes through the ground point C, the shield wire section B of the shield wire 1R of the right channel, and then passes through the signal source E R
flows to the ground point A. In other words, the ground impedance between E-L-H and between E-N-H becomes the common impedance of the amplification system, and a cross stroke occurs between the left and right channels. Therefore, there is a drawback that the separation between the left and right channels deteriorates, resulting in poor sound image localization.
本考案はこのような従来欠点を改良したもの
で、以下図において説明する。 The present invention improves on these conventional drawbacks, and will be explained below with reference to the drawings.
第２図において、第１図の従来例と同一部分に
ついては同一符号を付して説明すると、増幅器２
Ｌ，２Ｒの接地点ホ，ヘを直列接続した抵抗Ｒ
L，ＲRを介して共通に接続し、この抵抗ＲL，ＲR
の接続点Ｐをシヤーシに接地した構成である。 In FIG. 2, the same parts as those in the conventional example in FIG. 1 are designated by the same reference numerals.
Resistor R with the grounding points E and H of L and 2R connected in series
L and R R are connected in common through the resistors R L and R R
The connection point P is grounded to the chassis.
ここに、抵抗値ＲL，ＲRは、イ−ニ−ホ間の接
地インピーダンスＲ１、イ−ロ−ヘ間の接地イン
ピーダンスをRrとすれば、
RL≫R1
ＲR≫Rr
となるように定められ、通常は10乃至数10Ωの抵
抗値が選定される。 Here, the resistance values RL and RR are determined so that RL≫R1 RR≫Rr, where R1 is the grounding impedance between E-N-H and Rr is the grounding impedance between E-N-H. A resistance value of 10 to several tens of ohms is usually selected.
以上の構成は、増幅器２Ｌ，２Ｒの接地点ホ，
ヘをイ−ニ−ホ間の接地インピーダンスＲ１、イ
−ロ−ヘ間の接地インピーダンスRrより充分大
きな抵抗値を有する抵抗ＲL，ＲRを介してシヤー
シに接地したので、つまり、増幅器２Ｌ，２Ｒの
接地点ホ，ヘの接地電位を抵抗ＲL，ＲRによつて
分離したので、例えば、左チヤンネルのシールド
線１Ｌを伝送された信号電流は増幅器２Ｌを介し
て接地点ホに流れるが、抵抗ＲLがイ−ニ−ホ間
の接地インピーダンスＲ１に比べて充分に大きい
ため、この信号電流は、右チヤンネル側には流れ
ず、ホ−ニを経て、信号源ＥLの接地点イに流れ
る。また、右チヤンネルのシールド線１Ｒを伝送
された信号電流についても同様である。このよう
に、左右チヤンネルのシールド線１Ｌ，１Ｒを伝
送された信号電流は相互に他方チヤンネル側に流
れないので、左右チヤンネルの相互干渉がなくな
り、クロストークが低減され、左右チヤンネルの
セパレーシヨン特性が著しく向上し、音像定位が
正確なものとなり、立体感あふれるステレオ再生
音が得られる優れた利点を有する。 In the above configuration, the grounding point Ho of the amplifiers 2L and 2R,
Since the amplifier 2L is grounded to the chassis via the resistors R L and R R , which have resistance values sufficiently larger than the ground impedance R1 between E-N-H and the ground impedance Rr between E-L and H, Since the ground potentials of the grounding points E and H of the 2R are separated by the resistors R L and R R , for example, the signal current transmitted through the shielded wire 1L of the left channel flows to the grounding point E via the amplifier 2L. , the resistance R L is sufficiently larger than the grounding impedance R1 between E-N-H, so this signal current does not flow to the right channel side, but passes through H-N to the ground point of the signal source E L. flows to The same applies to the signal current transmitted through the shielded wire 1R of the right channel. In this way, the signal currents transmitted through the shielded wires 1L and 1R of the left and right channels do not flow toward the other channel, so mutual interference between the left and right channels is eliminated, crosstalk is reduced, and the separation characteristics of the left and right channels are improved. It has the excellent advantage of significantly improving sound image localization, and providing stereo reproduction sound with a full three-dimensional effect.
以上のように、本考案は、増幅器２Ｌ，２Ｒの
接地点ホ，ヘを抵抗ＲL，ＲRを介してそれぞれシ
ヤーシに接地した構成であるので、左右チヤンネ
ル間の相互干渉がなくなり、セパレーシヨン特性
が著しく向上する優れた利点を有する。 As described above, the present invention has a configuration in which the grounding points E and H of the amplifiers 2L and 2R are respectively grounded to the chassis via the resistors R L and R R , so mutual interference between the left and right channels is eliminated and the separation is It has the excellent advantage of significantly improved properties.
第１図は従来のステレオ増幅器の構成を示す
図、第２図は本考案のステレオ増幅器の構成を示
す図である。
２Ｌ，２Ｒは増幅器、ホ，ヘは接地点、ＲL，
ＲRは抵抗、Ｐは接続点である。
FIG. 1 is a diagram showing the configuration of a conventional stereo amplifier, and FIG. 2 is a diagram showing the configuration of the stereo amplifier of the present invention. 2L and 2R are amplifiers, E and F are ground points, R L ,
R R is a resistance, and P is a connection point.
Claims (1)
幅器２Ｌとからなり、上記信号源ＥLの接地点イ
と上記増幅器２Ｌの接地点ホとを接続し、当該接
地点ホを基準電位として左チヤンネルの信号を増
幅するようにした左チヤンネル増幅系と、右チヤ
ンネルの信号源ＥRと右チヤンネルの増幅器２Ｒ
とからなり、上記信号源ＥRの接地点イと上記増
幅器２Ｒの接地点ヘとを接続し、当該接地点ヘを
基準電位として右チヤンネルの信号を増幅するよ
うにした右チヤンネル増幅系とを具備するステレ
オ増幅器において、上記左チヤンネルの増幅器２
Ｌの接地点ホと右チヤンネルの増幅器２Ｒの接地
点ヘとを直列接続した抵抗ＲL，ＲRを介して共通
に接続し、当該直列接続した抵抗ＲL，ＲR同志の
接続点Ｐをシヤーシに接地し、かつ、上記抵抗Ｒ
L，ＲRの抵抗値を上記接地点イ−接地点ホ間の接
地インピーダンス、接地点イ−接地点ヘ間の接地
インピーダンスより大きくしたことを特徴とする
ステレオ増幅器。 Consisting of a left channel signal source E L and a left channel amplifier 2L, the ground point A of the signal source E L and the ground point E of the amplifier 2L are connected, and the left channel signal source E L is connected to the ground point E of the amplifier 2L. A left channel amplification system designed to amplify the signal, a right channel signal source E R , and a right channel amplifier 2R.
and a right channel amplification system which connects the ground point A of the signal source E R to the ground point of the amplifier 2R, and amplifies the right channel signal by using the ground point as a reference potential. In the stereo amplifier provided, the left channel amplifier 2
The grounding point E of L and the grounding point of the right channel amplifier 2R are commonly connected through series-connected resistors R L and R R , and the connection point P of the series-connected resistors R L and R R is connected in common. grounded to the chassis, and the above resistor R
A stereo amplifier characterized in that the resistance values of L and R R are made larger than the grounding impedance between the grounding point E and the grounding point E and the grounding impedance between the grounding point E and the grounding point H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979151647U JPS6216014Y2 (en) | 1979-10-31 | 1979-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979151647U JPS6216014Y2 (en) | 1979-10-31 | 1979-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5668319U JPS5668319U (en) | 1981-06-06 |
| JPS6216014Y2 true JPS6216014Y2 (en) | 1987-04-23 |
Family
ID=29382605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979151647U Expired JPS6216014Y2 (en) | 1979-10-31 | 1979-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6216014Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS432501Y1 (en) * | 1966-05-25 | 1968-02-01 |
-
1979
- 1979-10-31 JP JP1979151647U patent/JPS6216014Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS432501Y1 (en) * | 1966-05-25 | 1968-02-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5668319U (en) | 1981-06-06 |
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