JPH0133065B2 - - Google Patents
Info
- Publication number
- JPH0133065B2 JPH0133065B2 JP57168975A JP16897582A JPH0133065B2 JP H0133065 B2 JPH0133065 B2 JP H0133065B2 JP 57168975 A JP57168975 A JP 57168975A JP 16897582 A JP16897582 A JP 16897582A JP H0133065 B2 JPH0133065 B2 JP H0133065B2
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- transmitting
- circuit
- voltage
- winding
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/028—Arrangements specific to the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/0292—Arrangements specific to the receiver end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/493—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by transition coding, i.e. the time-position or direction of a transition being encoded before transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/0272—Arrangements for coupling to multiple lines, e.g. for differential transmission
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dc Digital Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
【発明の詳細な説明】
(A) 発明の技術分野
本発明は、データ伝送システム、特にデータ処
理システムにおけるチヤネルとデバイスとの間の
伝送に当つて、送信側トランスの１次側巻線に、
伝送信号の微分波形に該当する電圧を印加せしめ
るよう構成したデータ伝送システムに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (A) Technical Field of the Invention The present invention relates to a data transmission system, particularly a data processing system, in which a primary winding of a transmitting transformer is
The present invention relates to a data transmission system configured to apply a voltage corresponding to a differential waveform of a transmission signal.
(B) 技術の背景と問題点
従来から、データ処理システムにおけるデバイ
スの接続に当つて、伝送ケーブルが非所望に延長
される形となるという問題が存在した。しかし、
最近特に、従来では例えば100KHzの繰返し周波
数をもつ信号を600ｍ程度の距離伝送することが
限度にあつたのに対して、例えば1MHzの繰返し
周波数をもつ信号を1600ｍの距離まで伝送すると
いう如き必要性にせまられることが増加した。(B) Background and Problems of the Technology Conventionally, there has been a problem in connecting devices in data processing systems in that transmission cables are undesirably extended. but,
Recently, there has been an increasing need to transmit a signal with a repetition frequency of 1MHz over a distance of 1600m, whereas in the past, it was limited to transmitting a signal with a repetition frequency of 100KHz over a distance of about 600m. The frequency of being approached by others has increased.
(C) 発明の目的と構成
本発明は、上記の問題を解決することを目的と
しており、送信側トランスの１次側巻線にコンデ
ンサを含む回路素子を外付けし、受信側において
所望の波形となるよう送信側において波形を歪ま
せたものを伝送するよう構成し、上記の点を解決
したデータ伝送システムを提供することを目的と
している。そして、そのため、本発明のデータ伝
送システムは、データ処理システムにおけるチヤ
ネルとのデバイスとの間の伝送に当つて、送信側
にもうけられた送信側トランスをそなえると共に
受信側にもうけられた受信側トランスをそなえ、
当該両トランス間を伝送ケーブルによつて連繋し
てなり、かつ少なくとも上記送信側トランスがそ
の１次側巻線からみた回路が実質上インダクタン
スをもつ回路に等価される構成をもつデータ伝送
システムにおいて、上記送信側トランスの１次側
巻線に外付けされたコンデンサを含む回路素子を
直列にもうけ、上記送信側トランスの入力回路を
オン・オフさせた矩形波電圧を印加したことに対
応して、当該送信側トランスの２次側巻線に実質
上上記矩形波電圧に相当する電圧を発生せしめる
ようにしたことを特徴としている。以下図面を参
照しつつ説明する。(C) Object and Structure of the Invention The present invention aims to solve the above-mentioned problems, and by externally attaching a circuit element including a capacitor to the primary winding of the transmitting transformer, a desired waveform can be generated on the receiving side. The purpose of the present invention is to provide a data transmission system that solves the above problems by transmitting a waveform with a distorted waveform on the transmitting side. Therefore, the data transmission system of the present invention includes a transmitting side transformer provided on the transmitting side and a receiving side transformer provided on the receiving side for transmission between a channel and a device in a data processing system. Equipped with
In a data transmission system, the two transformers are connected by a transmission cable, and at least the transmitting transformer has a configuration in which a circuit viewed from its primary winding is substantially equivalent to a circuit having inductance, A circuit element including an external capacitor is connected in series to the primary winding of the transmitting transformer, and in response to applying a rectangular wave voltage that turns on and off the input circuit of the transmitting transformer, The present invention is characterized in that a voltage substantially corresponding to the rectangular wave voltage is generated in the secondary winding of the transmitting transformer. This will be explained below with reference to the drawings.
(D) 発明の実施例
第１図および第２図Ａ，Ｂは従来の問題点を説
明する説明図、第３図は本発明の要部構成を表わ
す一実施例、第４図Ａ，Ｂ，Ｃは第３図図示の構
成の動作を説明する説明図を示す。(D) Embodiment of the invention Fig. 1 and Fig. 2 A and B are explanatory diagrams explaining the conventional problems, Fig. 3 is an embodiment showing the main structure of the present invention, and Fig. 4 A and B , C are explanatory diagrams for explaining the operation of the configuration shown in FIG.
第１図において、１は送信側となるユニツト、
２は受信側となるユニツト、３は伝送ケーブル、
４は送信側トランス、５は受信側トランス、６は
ドライバ回路、７はドライバ・スイツチ、８はレ
シーバ回路を表わしている。 In FIG. 1, 1 is a unit on the sending side;
2 is the receiving unit, 3 is the transmission cable,
4 represents a transmitting side transformer, 5 a receiving side transformer, 6 a driver circuit, 7 a driver switch, and 8 a receiver circuit.
ドライバ回路６からの指示によつてドライバ・
スイツチ７がオン・オフされることによつて、図
示点ａの電位は第２図Ａ図示の如く変化せしめら
れる。これによつて、送信側トランスの１次側巻
線には、図示電位Viが印加され、受信側トラン
スの２次回路に第２図Ｂ図示の波形をもつ電圧
V0が現われる形となる。即ち、送信側トランス
や伝送ケーブルや受信側トランスの伝送周波数特
性にもとづいて、第２図Ａに示す如きいわば矩形
波がなまつたものとなり、このために伝送ケーブ
ル３の長さや伝送信号の繰返し周波数の増大に制
限が必要となつてくる。 The driver circuit 6 receives instructions from the driver circuit 6.
By turning the switch 7 on and off, the potential at point a is changed as shown in FIG. 2A. As a result, the indicated potential Vi is applied to the primary winding of the transmitting transformer, and the voltage having the waveform shown in FIG. 2B is applied to the secondary circuit of the receiving transformer.
This is the form in which V 0 appears. That is, based on the transmission frequency characteristics of the transmitting transformer, the transmission cable, and the receiving transformer, the rectangular wave as shown in FIG. It becomes necessary to limit the increase in frequency.
第３図は本発明の要部構成を表わす一実施例を
示し、図中の符号１ないし８は第１図に対応し、
９はコンデンサ、１０，１１は夫々抵抗を表わし
ている。 FIG. 3 shows an embodiment showing the configuration of the main parts of the present invention, and numerals 1 to 8 in the figure correspond to those in FIG. 1,
9 represents a capacitor, and 10 and 11 each represent a resistor.
第３図図示の場合、送信側トランス４の１次側
巻線に外付けされる形で、コンデンサ９と抵抗１
０とが１次側巻線に対して直列に接続され、かつ
インピーダンス・マツチング機能を兼ねる抵抗１
１が１次側巻線を含む回路に並列に接続される。 In the case shown in FIG. 3, a capacitor 9 and a resistor 1 are connected externally to the primary winding of the transmitting transformer 4.
0 is connected in series with the primary winding, and also serves as an impedance matching function.
1 is connected in parallel to the circuit containing the primary winding.
このように構成することによつて、ドライバ回
路６からの指示によつてドライバ・スイツチ７が
オン・オフされるとき、図示点ａの電位は第４図
Ａ図示の如く変化されるが、１次側巻線に印加さ
れる電圧は第４図Ｂ図示の如き波形をもつものと
なる。即ち、ドライバ・スイツチ７がオンされた
直後にはコンデンサ９に大きい充電電流が流れこ
み、コンデンサ９の充電が進むにつれて充電電流
が減少してゆく。そして、ドライバ・スイツチ７
がオフされたとき、コンデンサ９の電荷は抵抗
R2を経由しても放電する形となる。一方抵抗R1
には当該抵抗と上記１次側巻線のもつインダクタ
ンスとが直列に接続された場合に該当する所の増
大してゆく形の電流が流れる。したがつて、点ｂ
の電位は第４図Ｂ図示の如く変化する。即ち、図
示の電圧Viは、第４図Ａ図示の波形を微分した
形に該当するものとなる。そして、第４図Ｂ図示
の電圧によつて、受信側トランスの２次回路に
は、第４図Ｃ図示の如く比較的矩形波に近い電圧
が現われるようになる。即ち、第３図図示の構成
において外付け回路素子９，１０，１１が存在し
ない場合に第２図Ｂ図示の如きなまつた電圧しか
現われないのに対して、十分に矩形波に近い電圧
が現われるようになる。この結果、伝送ケーブル
３の許容できる長さを大にし、また伝送信号の繰
返し周波数を高めることが可能となる。 With this configuration, when the driver switch 7 is turned on or off according to an instruction from the driver circuit 6, the potential at the point a shown in the figure changes as shown in FIG. The voltage applied to the next winding has a waveform as shown in FIG. 4B. That is, immediately after the driver switch 7 is turned on, a large charging current flows into the capacitor 9, and as the capacitor 9 is charged, the charging current decreases. And driver switch 7
When the capacitor 9 is turned off, the charge on the capacitor 9 becomes the resistance
The discharge also occurs via R2 . On the other hand resistance R 1
When the resistor and the inductance of the primary winding are connected in series, an increasing current flows through the resistor and the inductance of the primary winding. Therefore, point b
The potential changes as shown in FIG. 4B. That is, the illustrated voltage Vi corresponds to a form obtained by differentiating the waveform illustrated in FIG. 4A. Due to the voltage shown in FIG. 4B, a voltage relatively close to a rectangular wave appears in the secondary circuit of the receiving transformer as shown in FIG. 4C. That is, in the configuration shown in FIG. 3, when the external circuit elements 9, 10, and 11 are not present, only a voltage as shown in FIG. 2B appears, whereas a voltage sufficiently close to a rectangular wave appears. It begins to appear. As a result, it becomes possible to increase the permissible length of the transmission cable 3 and increase the repetition frequency of the transmission signal.
(E) 発明の効果
以上説明した如く、本発明によれば、既存のト
ランスに、コンデンサを含む回路素子を外付けす
るだけで、伝窃できる線路長を大としたり、伝送
信号の繰返し周波数を高めることが可能となる。(E) Effects of the Invention As explained above, according to the present invention, by simply attaching a circuit element including a capacitor to an existing transformer, it is possible to increase the length of the line that can be used for propagation and to increase the repetition frequency of the transmission signal. It is possible to increase it.
第１図および第２図Ａ，Ｂは従来の問題点を説
明する説明図、第３図は本発明の要部構成を表わ
す一実施例、第４図Ａ，Ｂ，Ｃは第３図図示の構
成の動作を説明する説明図を示す。
図中、１は送信側となるユニツト、２は受信側
となるユニツト、３は伝送ケーブル、４は送信側
トランス、５は受信側トランス、６はドライバ回
路、７はドライバ・スイツチ、８はレシーバ回
路、９はコンデンサ、１０，１１は夫々抵抗を表
わす。
1 and 2 A and B are explanatory diagrams for explaining conventional problems, FIG. 3 is an embodiment showing the main structure of the present invention, and FIGS. 4 A, B, and C are illustrations of the third diagram. An explanatory diagram illustrating the operation of the configuration is shown. In the figure, 1 is a unit on the transmitting side, 2 is a unit on the receiving side, 3 is a transmission cable, 4 is a transmitting side transformer, 5 is a receiving side transformer, 6 is a driver circuit, 7 is a driver switch, and 8 is a receiver. In the circuit, 9 represents a capacitor, and 10 and 11 each represent a resistor.
Claims (1)
バイスとの間の伝送に当つて、送信側にもうけら
れた送信側トランスをそなえると共に受信側にも
うけられた受信側トランスをそなえ、当該両トラ
ンス間を伝送ケーブルによつて連繋してなり、か
つ少なくとも上記送信側トランスがその１次側巻
線からみた回路が実質上インダクタンスをもつ回
路に等価される構成をもつデータ伝送システムに
おいて、上記送信側トランスの１次側巻線に外付
けされたコンデンサを含む回路素子を直列にもう
け、上記送信側トランスの入力回路をオン・オフ
させた矩形波電圧を印加したことに対応して、当
該送信側トランスの２次側巻線に実質上上記矩形
波電圧に相当する電圧を発生せしめるようにした
ことを特徴とするデータ伝送システム。1 For transmission between a channel and a device in a data processing system, a transmitting side transformer is provided on the transmitting side, a receiving side transformer is provided on the receiving side, and a transmission cable is used between the two transformers. Therefore, in a data transmission system having a configuration in which at least the circuit of the transmitting side transformer viewed from its primary winding is substantially equivalent to a circuit having an inductance, the primary side of the transmitting side transformer is A circuit element including a capacitor externally attached to the winding is connected in series, and in response to the application of a rectangular wave voltage that turns on and off the input circuit of the transmitting transformer, the secondary side of the transmitting transformer is A data transmission system characterized in that the winding generates a voltage substantially corresponding to the rectangular wave voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16897582A JPS5958943A (en) | 1982-09-28 | 1982-09-28 | Data transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16897582A JPS5958943A (en) | 1982-09-28 | 1982-09-28 | Data transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5958943A JPS5958943A (en) | 1984-04-04 |
| JPH0133065B2 true JPH0133065B2 (en) | 1989-07-11 |
Family
ID=15878030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16897582A Granted JPS5958943A (en) | 1982-09-28 | 1982-09-28 | Data transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5958943A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61287383A (en) * | 1985-06-13 | 1986-12-17 | Olympus Optical Co Ltd | Image pickup device |
| US4901342A (en) * | 1986-08-22 | 1990-02-13 | Jones Reese M | Local area network connecting computer products via long telephone lines |
| JPH0779286B2 (en) * | 1988-10-19 | 1995-08-23 | 日本電気株式会社 | Transmission circuit |
| JP2591339B2 (en) * | 1990-11-22 | 1997-03-19 | 株式会社日立製作所 | Transmission waveform correction circuit |
| US7538582B2 (en) * | 2005-10-28 | 2009-05-26 | Advantest Corporation | Driver circuit, test apparatus and adjusting method |
| US9148313B2 (en) | 2007-01-09 | 2015-09-29 | Rambus, Inc. | Equalizing transmitter and method of operation |
| JP7759653B2 (en) * | 2018-11-07 | 2025-10-24 | ヴィスアイシー テクノロジーズ リミテッド | Differential voltage and current detector |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969639A (en) * | 1974-12-13 | 1976-07-13 | Sperry Rand Corporation | Transmission line driver circuit |
| JPS51135408A (en) * | 1975-05-20 | 1976-11-24 | Toshiba Corp | Wave form transmission formula |
| JPS5320813U (en) * | 1976-08-02 | 1978-02-22 |
-
1982
- 1982-09-28 JP JP16897582A patent/JPS5958943A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5958943A (en) | 1984-04-04 |
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