JPS5978757U - Bidirectional transmission circuit - Google Patents
Bidirectional transmission circuitInfo
- Publication number
- JPS5978757U JPS5978757U JP17573682U JP17573682U JPS5978757U JP S5978757 U JPS5978757 U JP S5978757U JP 17573682 U JP17573682 U JP 17573682U JP 17573682 U JP17573682 U JP 17573682U JP S5978757 U JPS5978757 U JP S5978757U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission line
- applying
- voltage
- potential level
- 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.)
- Pending
Links
Landscapes
- Bidirectional Digital Transmission (AREA)
- Dc Digital Transmission (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案双方向伝送回路の回路図、第２図及び第
３図は夫々共通信号線、下り信号線の電位状態を示す図
である。
７・・・第１の信号印加手段、１０・・・第２の信号印
加手段、１１・・・電圧印加手段、１３・・・上り信号
検出手段、１８・・・第１の信号検出手段、〜２２・・
・第２の信号検出手段、２６・・・上り信号印加手段。FIG. 1 is a circuit diagram of the bidirectional transmission circuit of the present invention, and FIGS. 2 and 3 are diagrams showing potential states of a common signal line and a downstream signal line, respectively. 7... First signal applying means, 10... Second signal applying means, 11... Voltage applying means, 13... Upstream signal detecting means, 18... First signal detecting means, ~22...
- Second signal detection means, 26... upstream signal application means.
Claims (1)
ク信号、端末側からセンター側へ伝送される上り信号を
一対の伝送線を介して伝送する双方向伝送回路に於いて
、 センター側には、同期信号を一電位レベルの信号として
前記伝送線へ印加する第１の信号印加手段と、クロック
信号を他電位レベルの信号として前記伝送線へ印加する
第２の信号印加手段と、前記クロック信号により他電位
レベルの信号が伝送線に印加されていないとき前記伝送
線へ逆電位極性の電圧を印加する電圧印加手段と、が設
けられており、 端末側には、伝送線に印加された一電位レベル信号を検
出する第１の信号検出手段と、伝送線に印加された他電
位レベル信号を検出する第２の信号検出手段と、伝送線
に逆電位極性の電圧が印加されたときこの逆電位極性の
電圧を基準レベルとして伝送線に信号を送出する上り信
号印加手段と、が設けられており、 上記伝送線を介して得られる逆電位極性の信号を検出す
る上り信号検出手段をセンター側に設けた事を特徴とす
る双方向伝送回路。[Claim for Utility Model Registration] A bidirectional transmission circuit that transmits synchronization signals and clock signals transmitted from the center side to the terminal side, and uplink signals transmitted from the terminal side to the center side via a pair of transmission lines. and on the center side, a first signal applying means for applying a synchronization signal as a signal of one potential level to the transmission line, and a second signal applying means for applying a clock signal as a signal of another potential level to the transmission line. and voltage applying means for applying a voltage of opposite potential polarity to the transmission line when a signal of another potential level is not applied to the transmission line according to the clock signal, and the terminal side is provided with A first signal detection means detects one potential level signal applied to the transmission line, a second signal detection means detects another potential level signal applied to the transmission line, and a voltage of opposite potential polarity is applied to the transmission line. Upstream signal applying means is provided for sending a signal to the transmission line using the voltage of the opposite potential polarity as a reference level when applied, and an upstream signal applying means for detecting the signal of the opposite potential polarity obtained via the transmission line. A bidirectional transmission circuit characterized in that a signal detection means is provided on the center side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17573682U JPS5978757U (en) | 1982-11-19 | 1982-11-19 | Bidirectional transmission circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17573682U JPS5978757U (en) | 1982-11-19 | 1982-11-19 | Bidirectional transmission circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5978757U true JPS5978757U (en) | 1984-05-28 |
Family
ID=30382244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17573682U Pending JPS5978757U (en) | 1982-11-19 | 1982-11-19 | Bidirectional transmission circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978757U (en) |
-
1982
- 1982-11-19 JP JP17573682U patent/JPS5978757U/en active Pending
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