JPH059046U - Pseudo-balanced signal transmission device - Google Patents
Pseudo-balanced signal transmission deviceInfo
- Publication number
- JPH059046U JPH059046U JP5464891U JP5464891U JPH059046U JP H059046 U JPH059046 U JP H059046U JP 5464891 U JP5464891 U JP 5464891U JP 5464891 U JP5464891 U JP 5464891U JP H059046 U JPH059046 U JP H059046U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission device
- signal transmission
- buffer
- pseudo
- 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.)
- Withdrawn
Links
- 230000008054 signal transmission Effects 0.000 title claims abstract description 25
- 239000000872 buffer Substances 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
(57)【要約】
【目的】 バランス方式とほぼ等しいＣＭＲＲを確保す
ると同時に信号受信器の数が増加した場合であっても接
続線の本数の増加を抑制することのできる疑似バランス
信号伝送装置を提供する。
【構成】 信号を低インピーダンスで出力する少なくと
も１つのバッファ１１０ｎを含む信号送信装置１１０
と、信号送信装置１１０内のバッファ１１０ｎの出力と
グランド線１２０によって伝送される信号を受信する信
号受信器１３ｎと、信号送信装置１１０のグランド線１
２０の接続端子１２１と信号送信装置１１０のアースと
の間に設置されたアースバッファ１１２から構成され
る。
(57) [Abstract] [Purpose] A pseudo-balanced signal transmission device capable of securing a CMRR almost equal to that of a balance system and suppressing an increase in the number of connection lines even when the number of signal receivers increases. provide. A signal transmission device 110 including at least one buffer 110n that outputs a signal with low impedance.
A signal receiver 13n that receives a signal transmitted by the output of the buffer 110n in the signal transmission device 110 and the ground line 120; and the ground line 1 of the signal transmission device 110.
It is composed of an earth buffer 112 installed between the connection terminal 121 of 20 and the earth of the signal transmission device 110.
Description
【０００１】[0001]
本発明は信号送信装置と信号受信器とを分離して設置した場合に送信装置と受 信器とを接続するケーブルからノイズを拾うことがなく、同時に送信装置と受信 器とを接続する接続線の本数の増加を抑制することの可能な疑似バランス信号伝 送装置に関する。 The present invention does not pick up noise from the cable connecting the transmission device and the receiver when the signal transmission device and the signal receiver are installed separately, and at the same time, a connection line connecting the transmission device and the receiver. The present invention relates to a pseudo-balanced signal transmission device capable of suppressing an increase in the number of lines.
【０００２】[0002]
信号送信装置と信号受信器とを分離して設置した場合の信号伝送方法としては バランス伝送とアンバランス伝送とがある。 図３の（イ）はバランス伝送、（ロ）はアンバランス伝送の概略の回路図であ る。 There are balanced transmission and unbalanced transmission as signal transmission methods when the signal transmission device and the signal receiver are installed separately. 3A is a schematic circuit diagram of balanced transmission, and FIG. 3B is a schematic circuit diagram of unbalanced transmission.
【０００３】 即ちバランス伝送においては同一の信号が正相バッファと逆相バッファとによ りバランス信号に変換され信号送信装置から出力される。 従って信号送信装置の信号伝送線とアース間およびグランド線とアース間の出 力インピーダンスは正相バッファおよび逆相バッファの出力インピーダンスで決 定されるためにほぼ等しい値となり同相ノイズ除去比（Common Mode Rejection Ratio 、以下ＣＭＲＲ）は高くなる。That is, in balanced transmission, the same signal is converted into a balanced signal by the positive phase buffer and the negative phase buffer, and is output from the signal transmission device. Therefore, the output impedances between the signal transmission line of the signal transmitter and the ground and between the ground line and the ground are determined by the output impedances of the positive-phase buffer and the negative-phase buffer, and therefore have almost the same value. Rejection Ratio (CMRR) becomes high.
【０００４】 一方アンバランス伝送においては信号が正相バッファでインピーダンス変換さ れ、アースに直接接続されたグランド線との間で信号が伝送される。 従って各信号受信器のグランド線を共通に接続することができ接続線の本数の 増加を抑制できる。On the other hand, in unbalanced transmission, a signal is impedance-converted by a positive phase buffer, and the signal is transmitted to a ground line directly connected to the ground. Therefore, the ground line of each signal receiver can be commonly connected, and the increase in the number of connection lines can be suppressed.
【０００５】[0005]
しかしながらバランス伝送においては信号送信装置と信号受信器との間をそれ ぞれ２本の接続線で接続しなければならず、信号受信器の数が増加すると信号送 信装置と信号受信器との間を接続する接続線の本数が増加することを避けること はできない。 However, in balanced transmission, it is necessary to connect the signal transmitter and the signal receiver with two connecting lines each, and if the number of signal receivers increases, the signal transmitter and the signal receiver will be connected. It is unavoidable that the number of connecting lines connecting between them will increase.
【０００６】 一方アンバランス伝送にあっては、信号送信装置の信号伝送線とアースとの間 のインピーダンスおよびグランド線とアースとの間のインピーダンスは等しくな く、ＣＭＲＲを高く維持できない。 本考案は係る問題点に鑑みなされたものであって、バランス方式とほぼ等しい ＣＭＲＲを確保すると同時に信号受信器の数が増加した場合であっても接続線の 本数の増加を抑制することのできる疑似バランス信号伝送装置を提供することを 目的とする。On the other hand, in the unbalanced transmission, the impedance between the signal transmission line of the signal transmission device and the ground and the impedance between the ground line and the ground are not equal, and the CMRR cannot be kept high. The present invention has been made in view of the above problems, and it is possible to secure a CMRR that is almost equal to that of the balance method and at the same time suppress an increase in the number of connection lines even when the number of signal receivers increases. It is an object of the present invention to provide a pseudo-balanced signal transmission device.
【０００７】[0007]
信号を低インピーダンスで出力する少なくとも１つのバッファ１１０ｎ（１≦ ｎ≦Ｎ）を有する信号送信装置１１０と、信号送信装置１１０内のバッファ１１ ０ｎ（１≦ｎ≦Ｎ）の出力とグランド線１２０によって伝送される信号を受信す る信号受信器１３ｎ（１≦ｎ≦Ｎ）と、信号送信装置１１０に設置されたグラン ド線１２０の接続端子１２１と信号送信装置１１０のアースとの間にアースバッ ファ１１２と、から構成される。 By the signal transmitter 110 having at least one buffer 110n (1 ≦ n ≦ N) that outputs a signal with low impedance, and the output of the buffer 110n (1 ≦ n ≦ N) and the ground line 120 in the signal transmitter 110. An earth buffer is provided between the signal receiver 13n (1 ≦ n ≦ N) that receives the transmitted signal and the connection terminal 121 of the ground line 120 installed in the signal transmitting apparatus 110 and the ground of the signal transmitting apparatus 110. And 112.
【０００８】[0008]
信号送信装置のグランド線とアース間のインピーダンスはアースバッファの出 力インピーダンスとなり、信号伝送線とアース間のインピーダンスと等しくなる ためＣＭＲＲは高くなる。 同時にグランド線は２以上の信号受信器で共通とすることができ、接続線の本 数の増加が抑制される。 The impedance between the ground line of the signal transmitting device and the ground becomes the output impedance of the ground buffer, which is equal to the impedance between the signal transmission line and the ground, resulting in a high CMRR. At the same time, the ground line can be shared by two or more signal receivers, and the increase in the number of connecting lines is suppressed.
【０００９】[0009]
図２は本考案の１実施例の構成図であって、高域および中低域に分離されたオ ーディオ信号を、信号送信装置であるアンプ２１０から信号受信器である高域ス ピーカ２３１、２３３および中低域スピーカ２３２、２３４で構成される左側ス ピーカユニット２３０Ｌおよび右側スピーカユニット２３０Ｒに伝送する場合を 示す。 FIG. 2 is a block diagram of an embodiment of the present invention, in which an audio signal separated into a high frequency band and a low frequency band is supplied from an amplifier 210 which is a signal transmission device to a high frequency speaker 231 which is a signal receiver. The case of transmitting to the left-side speaker unit 230L and the right-side speaker unit 230R configured by the 233 and the mid-low range speakers 232 and 234 is shown.
【００１０】 アンプ２１０は左側高域信号を出力する第１のバッファ２１０１、左側中低域 信号を出力する第２のバッファ２１０２、右側高域信号を出力する第３のバッフ ァ２１０３および右側中低域信号を出力する第４のバッファ２１０４から構成さ れ、さらにアースとグランド端子２２１との間にアースバッファ２１２を含む。 各スピーカユニット２３０Ｌおよび２３０Ｒにふくまれる高域スピーカ２３１ 、２３３と中低域スピーカ２３２、２３４の一方の入力端子は共通に接続され、 アンプ２１０のグランド端子２２１に一括接続される。The amplifier 210 includes a first buffer 2101, which outputs a left high-frequency signal, a second buffer 2102 which outputs a left mid-low frequency signal, a third buffer 2103 which outputs a right high-frequency signal, and a right middle-low frequency. It is composed of a fourth buffer 2104 which outputs a range signal, and further includes an earth buffer 212 between the earth and the ground terminal 221. One of the input terminals of the high frequency speakers 231, 233 and the middle and low frequency speakers 232, 234 included in each of the speaker units 230L and 230R are connected in common, and are collectively connected to the ground terminal 221 of the amplifier 210.
【００１１】 各スピーカ２３１、２３２、２３３および２３４の共通接続されない入力端子 はそれぞれアンプ２１０内のバッファ２１０１、２１０２、２１０３および２１ ０４に接続される。 各バッファ２１０１、２１０２、２１０３および２１０４とアースバッファ２ １２の出力インピーダンスは等しいから各バッファと各スピーカとの間はバラン ス伝送により信号が伝送されているものとみなすことができ、ＣＭＲＲを高く維 持することができる。Non-commonly connected input terminals of the speakers 231, 232, 233 and 234 are connected to buffers 2101, 2102, 2103 and 2104 in the amplifier 210, respectively. Since the output impedances of the buffers 2101, 2102, 2103 and 2104 and the earth buffer 212 are equal, it can be considered that signals are transmitted by balance transmission between each buffer and each speaker, and the CMRR is kept high. Can have.
【００１２】 一方アンプ２１０とスピーカとの間の接続線はバッファとスピーカとの間の信 号伝送線が４本、グランド線が１本の合計５本である。 従来のバランス伝送にあっては各バッファおよびスピーカ間毎に２本、即ち４ 組のバッファ、スピーカに対しては合計８本の伝送線が必要であったのと比較す ると３本の接続線を減少することが可能となる。On the other hand, the connection lines between the amplifier 210 and the speaker are five in total, that is, four signal transmission lines between the buffer and the speaker and one ground line. In the conventional balanced transmission, two lines were required between each buffer and speaker, that is, four sets of buffers and a total of eight transmission lines were required for the speakers, compared to three connections. It is possible to reduce the line.
【００１３】[0013]
以上説明したように本考案によれば、バランス伝送とほぼ等しいＣＭＲＲを維 持し、かつ信号送信装置と信号受信器との間の接続線の本数の増加を抑制するこ とができる。 As described above, according to the present invention, it is possible to maintain CMRR which is almost equal to that of balanced transmission and to suppress an increase in the number of connecting lines between the signal transmission device and the signal receiver.
【図面の簡単な説明】[Brief description of drawings]
【図１】図１は、本考案に係る疑似バランス信号伝送装
置の基本構成図である。FIG. 1 is a basic configuration diagram of a pseudo-balanced signal transmission device according to the present invention.
【図２】図２は、本考案に係る疑似バランス信号伝送装
置の実施例の構成図である。FIG. 2 is a configuration diagram of an embodiment of a pseudo-balanced signal transmission device according to the present invention.
【図３】図３は、従来使用されている信号送信装置と信
号受信器との間の信号伝送方法の説明図である。FIG. 3 is an explanatory diagram of a signal transmission method between a signal transmitter and a signal receiver which are conventionally used.
１１０…オーディオ信号送信装置 １１０１、１１０２・・・１１０Ｎ…バッファ １１２…アースバッファ １２０…グランド線 １２１…グランド端子 １３１、１３２・・・１３Ｎ…オーディオ信号受信器 110 ... Audio signal transmitter 1101, 1102 ... 110N ... Buffer 112 ... Ground buffer 120 ... Ground line 121 ... Ground terminal 131, 132 ... 13N ... Audio signal receiver
Claims (1)
くとも１つのバッファ（１１０ｎ、１≦ｎ≦Ｎ）を有す
る信号送信装置（１１０）と、 該信号送信装置（１１０）内のバッファ（１１０ｎ、１
≦ｎ≦Ｎ）の出力とグランド線（１２０）によって伝送
される信号を受信する信号受信器（１３ｎ、１≦ｎ≦
Ｎ）と、から構成される信号伝送装置において、 該信号送信装置（１１０）に設置された該グランド線
（１２０）の接続端子（１２１）と該信号送信装置（１
１０）のアースとの間にアースバッファ（１１２）を設
置することを特徴とする疑似バランス信号伝送装置。Claims for utility model registration 1. A signal transmitter (110) having at least one buffer (110n, 1 ≦ n ≦ N) for outputting a signal with low impedance, and the signal transmitter (110). Internal buffer (110n, 1
A signal receiver (13n, 1 ≦ n ≦) that receives the signal transmitted by the output of ≦ n ≦ N and the ground line (120).
N), a connection terminal (121) of the ground line (120) installed in the signal transmission device (110) and the signal transmission device (1).
A pseudo-balanced signal transmission device characterized in that an earth buffer (112) is installed between the earth and the earth of (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5464891U JPH059046U (en) | 1991-07-15 | 1991-07-15 | Pseudo-balanced signal transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5464891U JPH059046U (en) | 1991-07-15 | 1991-07-15 | Pseudo-balanced signal transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH059046U true JPH059046U (en) | 1993-02-05 |
Family
ID=12976605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5464891U Withdrawn JPH059046U (en) | 1991-07-15 | 1991-07-15 | Pseudo-balanced signal transmission device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH059046U (en) |
-
1991
- 1991-07-15 JP JP5464891U patent/JPH059046U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19951102 |