GB1256674A - - Google Patents
Info
- Publication number
- GB1256674A GB1256674A GB1256674DA GB1256674A GB 1256674 A GB1256674 A GB 1256674A GB 1256674D A GB1256674D A GB 1256674DA GB 1256674 A GB1256674 A GB 1256674A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lines
- signal
- pulse
- absence
- receiving circuit
- 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
- H04L25/0298—Arrangement for terminating transmission lines
-
- 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
- H04L25/0282—Provision for current-mode 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
- H04L25/10—Compensating for variations in line balance
-
- 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
- H04L25/0274—Arrangements for ensuring balanced 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
- H04L25/0292—Arrangements specific to the receiver end
- H04L25/0294—Provision for current-mode coupling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Manipulation Of Pulses (AREA)
- Amplifiers (AREA)
Abstract
1,256,674. Digital transmission systems. YOKOGAWA ELECTRIC WORKS Ltd. 10 July, 1970, No. 33526/70. Heading H4P. A pair of transmission lines are balanced by impedances having the same characteristic impedance connected to opposite ends of the lines. A pulse transmission circuit causes currents of equal amplitudes to flow in the lines, feeding a receiving circuit having a differential amplifier. Line L1, L2 of impedance Zo are terminated in a resistor RZ = Zo and a balanced potential divider R1, R2, where R1/2R2=Zo connected across a supply Vc and a capacitor C. The arrangement ensures that there are no signal reflections at ends of the lines. A pulse generator Fig. 2A comprises a switching transistor Q1 operating oppositely from constant current transistors Q2, Q3, diodes B2, B3 providing temperature compensation. The receiver Fig. 2B (not shown) reverses the polarity of its output at zero signal input, and in the absence of a signal the bias voltage developed across R1 prevents the potentiasdifference between lines L1, L2 dropping to zero in the absence of a signal. Any number of pulse transmitters not operating simultaneously, and any number of receivers may be connected across the lines if the input impedances of the receiving circuit are made sufficiently high.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3352670 | 1970-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1256674A true GB1256674A (en) | 1971-12-15 |
Family
ID=10354105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1256674D Expired GB1256674A (en) | 1970-07-10 | 1970-07-10 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1256674A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2131658A (en) * | 1982-12-10 | 1984-06-20 | Western Electric Co | Communication bus |
-
1970
- 1970-07-10 GB GB1256674D patent/GB1256674A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2131658A (en) * | 1982-12-10 | 1984-06-20 | Western Electric Co | Communication bus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |