EP0627110B1 - Synchronisation pulse mixer without power supply - Google Patents

Synchronisation pulse mixer without power supply Download PDF

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Publication number
EP0627110B1
EP0627110B1 EP93920641A EP93920641A EP0627110B1 EP 0627110 B1 EP0627110 B1 EP 0627110B1 EP 93920641 A EP93920641 A EP 93920641A EP 93920641 A EP93920641 A EP 93920641A EP 0627110 B1 EP0627110 B1 EP 0627110B1
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EP
European Patent Office
Prior art keywords
pulse mixer
horizontal
synchronisation
signals
mixer
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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.)
Revoked
Application number
EP93920641A
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German (de)
French (fr)
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EP0627110A1 (en
Inventor
Hubert Wey
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WEY ELEKTRONIK AG
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WEY ELEKTRONIK AG
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/28—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using colour tubes
    • G09G1/285—Interfacing with colour displays, e.g. TV receiver

Definitions

  • Display devices form an important part of the periphery of personal computers.
  • the decisive advantage of the display devices is that they enable a real dialogue between the user and the personal computer.
  • the clerk can exchange information directly with the personal computer.
  • An area of application for personal computers with display devices is stock exchange and foreign exchange trading.
  • the clerk who works in exchange and foreign exchange trading needs various information for his work, such as current share prices or exchange rates.
  • This information is fed into the personal computer from a central database.
  • This central database is usually not in the same building as the personal computer, but in the building of a company that provides the banks with the necessary data. In this case, the data are transmitted via telephone lines to the corresponding personal computers.
  • the clerk can now interactively use a keyboard and a screen device to select the data he needs, after which it is displayed on the screen. For example, he can enter the term "US dollar” and the screen will display the current exchange rate of the US dollar.
  • VGA cards video graphics adapter cards
  • synchronous pulse mixers which convert the signals from eight lines in such a way that only three coaxial cables are required for forwarding to an RGB monitor or to a video switch. This is achieved by mixing the horizontal sync pulses, the vertical sync pulses and the green signals on a single coaxial cable.
  • the signals for red and the ground for red are directly on another coaxial cable, the signals for blue and put the mass for blue directly on a third coaxial cable.
  • the disadvantage of the known synchronous pulse mixers is that their electronic circuitry requires a separate current source. This means that the space required for these synchronous pulse mixers is very large. The electronic circuit and the power supply are housed in a relatively large housing. An additional mains socket and a corresponding plug are also required to connect these synchronous pulse mixers to the mains.
  • European patent application 0 322 897 A2 relates to a system in which data and electrical power are transmitted and received.
  • This system consists of interconnected communication devices. Data signals are transmitted between the communication devices. These data signals are formed in the communication devices from data and from synchronization signals. The data signals are then transmitted from one communication device to another. This other communication device receiving the data signal can then obtain electrical power from the synchronization signal.
  • the invention has for its object to provide a synchronous pulse mixer, which is able to convert the signals of the nine outputs of a VGA card in such a way that only three coaxial cables are necessary for their forwarding and the electronic circuit does not require an additional power source .
  • the first coaxial cable 16 is directly connected to the VGA output 1 for the signals of red and the VGA output 6 connected to the ground of red.
  • the VGA output 13 for the horizontal synchronizing pulse, the output 14 for the vertical synchronizing pulse and the output 5 for the corresponding ground are connected to the electronic circuit 20 which mixes the horizontal synchronizing pulse and the vertical synchronizing pulse and the same Passes on as the signal for green, which comes from the corresponding VGA output 2.
  • the combined signal for the vertical synchronization, for the horizontal synchronization and for green is given to the first line of the second coaxial cable 17.
  • the second line of the second coaxial cable 17 is connected directly to the VGA output 7 for the mass of green.
  • the output 3 of the signal for blue and the output 8 for the ground of blue is connected directly to the third coaxial cable 18.
  • part of the energy of the vertical synchronizing pulse and the horizontal synchronizing pulse is branched off, rectified and smoothed.
  • the resulting electrical direct current is supplied to the electronic circuit 20.
  • part of the electrical vertical and horizontal sync pulse is taken directly behind the corresponding VGA output 13, 14 via a line 21, rectified with a diode 22 and smoothed with a capacitor 23.
  • the smoothed direct current from the two synchronizing pulses is fed to the electronic circuit 20 via a common line 24.
  • the electronic circuit 20 for mixing the horizontal and vertical synchronizing pulses is preferably designed as an integrated circuit (IC).
  • the electronics for branching, rectifying and smoothing part of the electrical energy of the horizontal and vertical synchronizing pulses is manufactured in SMD technology.
  • the proposed sync pulse mixer faces the previously known synchronizing pulse mixers have significant advantages. He no longer requires a separate power source for the electronic circuit 20 for mixing the horizontal and vertical synchronizing pulse. As a result, it can be built much smaller than the previously known synchronous pulse mixers. Thanks to this miniaturization, it is no longer necessary to install the sync pulse mixer in the personal computer. It can be connected externally.
  • the proposed synchronous pulse mixer has the advantage that no additional sockets and corresponding plugs have to be provided for its supply.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Bidirectional Digital Transmission (AREA)

Abstract

A synchronisation pulse mixer converts the signals from the nine outputs (1, 2, 3, 5, 6, 7, 8, 13, 14) of a VGA card in such a way that only three coaxial cables (16, 17, 18) are required to retransmit them to a video switch or to a RGB monitor. This synchronisation pulse mixer is characterized in particular in that the electric energy required by the electronic circuit (20) which mixes the vertical and horizontal synchronisation pulses is directly tapped from the vertical and horizontal synchronisation pulses. An additional power supply may thus be dispensed with and the size of the synchronisation pulse mixer may be substantially reduced.

Description

Bildschirmgeräte bilden einen wichtigen Bestandteil der Peripherie von Personalcomputern. Der entscheidende Vorteil der Bildschirmgeräte ist darin zu sehen, dass sie einen echten Dialog zwischen dem Benutzer und dem Personalcomputer ermöglichen. In einer Art Frage- und Antwortwechsel (interaktiver Eingabe- und Ausgabebetrieb) kann der Sachbearbeiter mit dem Personalcomputer Informationen direkt austauschen. Ein Anwendungsbereich für Personalcomputer mit Bildschirmgeräten ist der Börsen- und Devisenhandel. Der Sachbearbeiter, welcher im Börsen- und Devisenhandel tätig ist, braucht für seine Arbeit verschiedene Informationen, wie aktuelle Aktienkurse oder Wechselkurse. Diese Informationen werden von einer zentralen Datenbank in den Personalcomputer eingespiesen. Üblicherweise befindet sich diese zentrale Datenbank nicht im gleichen Gebäude wie die Personalcomputer, sondern im Gebäude einer Firma, welche den Banken die nötigen Daten bereitstellt. Die Daten werden in diesem Fall über Telefonleitungen zu den entsprechenden Personalcomputern übermittelt.Display devices form an important part of the periphery of personal computers. The decisive advantage of the display devices is that they enable a real dialogue between the user and the personal computer. In a kind of question and answer change (interactive input and output mode), the clerk can exchange information directly with the personal computer. An area of application for personal computers with display devices is stock exchange and foreign exchange trading. The clerk who works in exchange and foreign exchange trading needs various information for his work, such as current share prices or exchange rates. This information is fed into the personal computer from a central database. This central database is usually not in the same building as the personal computer, but in the building of a company that provides the banks with the necessary data. In this case, the data are transmitted via telephone lines to the corresponding personal computers.

Der Sachbearbeiter kann nun interaktiv mit Hilfe einer Tastatur und eines Bildschirmgerätes die von ihm benötigten Daten auswählen, worauf diese auf dem Bildschirm wiedergegeben werden. Er kann zum Beispiel den Begriff "US-Dollar" eingeben, worauf auf dem Bildschirm der aktuelle Wechselkurs des US-Dollars erscheint.The clerk can now interactively use a keyboard and a screen device to select the data he needs, after which it is displayed on the screen. For example, he can enter the term "US dollar" and the screen will display the current exchange rate of the US dollar.

Es ist bei Banken üblich, dass die Personalcomputer nicht direkt am Arbeitsplatz auf dem Schreibtisch stehen, sondern entweder im Keller oder aber im Zwischenboden untergebracht sind. Dadurch wird am Arbeitsplatz weniger Platz versperrt und die Wartung bzw. Datensicherung der Personalcomputer wird erleichtert.It is common for banks that the personal computers are not directly on the desk at the workplace, but are located either in the basement or in the mezzanine. As a result, less space is blocked at the workplace and maintenance or data backup of the personal computer is made easier.

Der Nachteil dieser Anordnung besteht darin, dass die Daten vom Personalcomputer über längere Distanzen mit Kabeln zu den Bildschirmgeräten geleitet werden müssen. Bei Distanzen von über 1,8 Metern muss man für eine qualitativ hochstehende Datenübertragung Koaxialkabel verwenden.The disadvantage of this arrangement is that the data must be routed from the personal computer over long distances to the display devices with cables. At distances of over 1.8 meters, coaxial cables must be used for high-quality data transmission.

Zur Darstellung von Daten auf einen Bildschirmgerät müssen die Signale, welche vom Prozessor des Personalcomputers ausgegeben werden, aufgearbeitet werden. Diese Aufgabe wird von sogenannten Graphikkarten übernommen. Am häufigsten verwendet man heute VGA-Karten (Video-Graphics-Adapter-Karten).To display data on a screen device, the signals which are output by the processor of the personal computer must be processed. This task is performed by so-called graphics cards. VGA cards (video graphics adapter cards) are used most frequently today.

Das Übertragungsprinzip dieser Karten ist analog. Ihre Adapter (Ausgänge) besitzen 15polige Buchsen mit folgender Belegung:

Kontakt 1:
Signal für Rot
Kontakt 6:
Masse für Rot
Kontakt 13:
Signal für Horizontal-Synchronisation
Kontakt 14:
Signal für Vertikal-Synchronisation
Kontakt 5:
Masse (digital)
Kontakt 2:
Signal für Grün
Kontakt 7:
Masse für Grün
Kontakt 3:
Signale für Blau
Kontakt 8:
Masse für Blau
The transfer principle of these cards is analog. Your adapters (outputs) have 15-pin sockets with the following assignment:
Contact 1:
Signal for red
Contact 6:
Mass for red
Contact 13:
Horizontal synchronization signal
Contact 14:
Vertical synchronization signal
Contact 5:
Mass (digital)
Contact 2:
Signal for green
Contact 7:
Mass for green
Contact 3:
Signals for blue
Contact 8:
Mass for blue

Nimmt man die Signale direkt von diesen 15poligen Buchsen ab, benötigt man neun Leitungen. Zur Übermittlung der Videosignale zu einem Videoschalter oder einem RGB-Monitor ist es unumgänglich, die Anzahl der Leitungen zu reduzieren.If you take the signals directly from these 15-pin sockets, you need nine lines. To transmit the video signals to a video switch or an RGB monitor, it is essential to reduce the number of lines.

Gemäss dem heutigen Stand der Technik sind Synchronimpuls-Mischer bekannt, welche die Signale von acht Leitungen derartig umwandeln, dass zur Weiterleitung zu einem RGB-Monitor oder zu einem Videoschalter nur noch drei Koaxialkabel notwendig sind. Dies wird dadurch erreicht, dass die Horizontal-Synchronimpulse, die Vertikal-Synchronimpulse und die Signale für Grün auf ein einziges Koaxialkabel gemischt werden. Die Signale für Rot und die Masse für Rot werden direkt auf ein weiteres Koaxialkabel, die Signale für Blau und die Masse für Blau direkt auf ein drittes Koaxialkabel gegeben.According to the current state of the art, synchronous pulse mixers are known which convert the signals from eight lines in such a way that only three coaxial cables are required for forwarding to an RGB monitor or to a video switch. This is achieved by mixing the horizontal sync pulses, the vertical sync pulses and the green signals on a single coaxial cable. The signals for red and the ground for red are directly on another coaxial cable, the signals for blue and put the mass for blue directly on a third coaxial cable.

Der Nachteil der bekannten Synchronimpuls-Mischer besteht darin, dass ihre elektronische Schaltung eine separate Stromquelle benötigt. Dadurch ist der Platzbedarf dieser Synchronimpuls-Mischer sehr gross. Die elektronische Schaltung und das Netzteil sind in einem relativ grossen Gehäuse untergebracht. Für den Anschluss dieser Synchronimpuls-Mischer am Netz benötigt man ausserdem eine zusätzliche, Netz-Steckdose und einen entsprechenden Stecker.The disadvantage of the known synchronous pulse mixers is that their electronic circuitry requires a separate current source. This means that the space required for these synchronous pulse mixers is very large. The electronic circuit and the power supply are housed in a relatively large housing. An additional mains socket and a corresponding plug are also required to connect these synchronous pulse mixers to the mains.

Die europäische Patentanmeldung 0 322 897 A2 betrifft ein System, bei welchem Daten und elektrische Leistung übertragen und empfangen wird. Dieses System besteht aus miteinander verbundenen Kommunikationsvorrichtungen. Zwischen den Kommunikationsvorrichtungen werden Datensignale übertragen. Diese Datensignale werden in den Kommunikationseinrichtungen aus Daten und aus Synchronisationssignalen gebildet. Die Datensignale werden dann von einer Kommunikationsvorrichtung zur anderen übertragen. Diese andere, das Datensignal empfangende Kommunikationsvorrichtung kann dann aus dem Synchronisationssignal elektrische Leistung gewinnen.European patent application 0 322 897 A2 relates to a system in which data and electrical power are transmitted and received. This system consists of interconnected communication devices. Data signals are transmitted between the communication devices. These data signals are formed in the communication devices from data and from synchronization signals. The data signals are then transmitted from one communication device to another. This other communication device receiving the data signal can then obtain electrical power from the synchronization signal.

Die Erfindung stellt sich die Aufgabe, einen Synchronimpuls-Mischer zu schaffen, welcher in der Lage ist, die Signale der neun Ausgänge einer VGA-Karte derartig umzuwandeln, dass für ihre Weiterleitung nur noch drei Koaxialkabel notwendig sind und dessen elektronische Schaltung keine zusätzliche Stromquelle benötigt.The invention has for its object to provide a synchronous pulse mixer, which is able to convert the signals of the nine outputs of a VGA card in such a way that only three coaxial cables are necessary for their forwarding and the electronic circuit does not require an additional power source .

Die Aufgabe wird erfindungsgemäss mit Hilfe der Ausbildungsmerkmale nach dem kennzeichnenden Teil des Patentanspruches 1 gelöst.The object is achieved according to the invention with the aid of the training features according to the characterizing part of patent claim 1.

Die Erfindung besteht im wesentlichen darin, dass beim vorgeschlagenen Synchronimpuls-Mischer die elektrische Energie, welche von der elektronischen Schaltung benötigt wird, direkt vom Vertikal- und Horizontal-Synchronimpuls abgezweigt wird. Dadurch kann auf eine zusätzliche Stromquelle verzichtet und der Synchronimpuls-Mischer wesentlich kleiner gestaltet werden. Es zeigt:

Fig. 1
Blockschema des Synchronimpuls-Mischers ohne separate Stromversorgung
The invention essentially consists in the fact that in the proposed synchronizing pulse mixer the electrical energy which is required by the electronic circuit is branched off directly from the vertical and horizontal synchronizing pulse. This means that an additional power source can be dispensed with and the synchronizing pulse mixer can be made significantly smaller. It shows:
Fig. 1
Block diagram of the synchronous pulse mixer without separate power supply

Beim vorgeschlagenen Synchronimpuls-Mischer ist das erste Koaxialkabel 16 direkt mit dem VGA-Ausgang 1 für die Signale von Rot und dem VGA-Ausgang 6 für die Masse von Rot verbunden. Der VGA-Ausgang 13 für den Horizontal-Synchronimpuls, der Ausgang 14 für den Vertikal-Synchronimpuls und der Ausgang 5 für die entsprechende Masse sind an der elektronischen Schaltung 20 angeschlossen, welche den Horizontal-Synchronimpuls und den Vertikal-Synchronimpuls mischt und auf die gleiche Leitung wie das Signal für Grün, welches vom entsprechenden VGA-Ausgang 2 kommt, weitergibt. Auf die erste Leitung des zweiten Koaxialkabels 17 wird das kombinierte Signal für die Vertikal-Synchronisation, für die Horizontal-Synchronisation und für Grün gegeben. Die zweite Leitung des zweiten Koaxialkabels 17 ist direkt mit dem VGA-Ausgang 7 für die Masse von Grün verbunden. Der Ausgang 3 des Signals für Blau und der Ausgang 8 für die Masse von Blau ist direkt mit dem dritten Koaxialkabel 18 verbunden.In the proposed synchronous pulse mixer, the first coaxial cable 16 is directly connected to the VGA output 1 for the signals of red and the VGA output 6 connected to the ground of red. The VGA output 13 for the horizontal synchronizing pulse, the output 14 for the vertical synchronizing pulse and the output 5 for the corresponding ground are connected to the electronic circuit 20 which mixes the horizontal synchronizing pulse and the vertical synchronizing pulse and the same Passes on as the signal for green, which comes from the corresponding VGA output 2. The combined signal for the vertical synchronization, for the horizontal synchronization and for green is given to the first line of the second coaxial cable 17. The second line of the second coaxial cable 17 is connected directly to the VGA output 7 for the mass of green. The output 3 of the signal for blue and the output 8 for the ground of blue is connected directly to the third coaxial cable 18.

Zur Speisung der elektronischen Schaltung 20 wird ein Teil der Energie des Vertikal-Synchronimpulses und des Horizontal-Synchronimpulses abgezweigt, gleichgerichtet und geglättet. Der resultierende, elektrische Gleichstrom wird der elektronischen Schaltung 20 zugeführt.To supply the electronic circuit 20, part of the energy of the vertical synchronizing pulse and the horizontal synchronizing pulse is branched off, rectified and smoothed. The resulting electrical direct current is supplied to the electronic circuit 20.

Bei einer bevorzugten Ausbildungsart wird ein Teil des elektrischen Vertikal- und Horizontalsynchronimpulses direkt hinter dem entsprechenden VGA-Ausgang 13, 14 über je eine Leitung 21 abgenommen, mit je einer Diode 22 gleichgerichtet und mit einem Kondensator 23 geglättet. Der geglättete Gleichstrom aus beiden Synchronimpulsen wird über eine gemeinsame Leitung 24 der elektronischen Schaltung 20 zugeführt.In a preferred embodiment, part of the electrical vertical and horizontal sync pulse is taken directly behind the corresponding VGA output 13, 14 via a line 21, rectified with a diode 22 and smoothed with a capacitor 23. The smoothed direct current from the two synchronizing pulses is fed to the electronic circuit 20 via a common line 24.

Die elektronische Schaltung 20 zum Mischen der Horizontal und Vertikal-Synchronimpulse ist vorzugsweise als integrierte Schaltung (IC) ausgebildet.The electronic circuit 20 for mixing the horizontal and vertical synchronizing pulses is preferably designed as an integrated circuit (IC).

Die Elektronik zur Abzweigung, Gleichrichtung und Glättung eines Teiles der elektrischen Energie der Horizontal- und Vertikal-Synchronimpulse ist in SMD-Technik gefertigt.The electronics for branching, rectifying and smoothing part of the electrical energy of the horizontal and vertical synchronizing pulses is manufactured in SMD technology.

Der vorgeschlagene Synchronimpuls-Mischer weist gegenüber den bisher bekannten Synchronimpuls-Mischern wesentliche Vorteile auf.Er benötigt für die elektronische Schaltung 20 zum Mischen des Horizontal- und Vertikal-Synchronimpulses keine separate Stromquelle mehr. Dadurch kann er im Vergleich zu den bisher bekannten Synchronimpuls-Mischern wesentlich kleiner gebaut werden. Dank dieser Miniaturisierung ist es nicht mehr notwendig, den Synchronimpuls-Mischer in den Personalcomputer einzubauen. Er kann extern angeschlossen werden.The proposed sync pulse mixer faces the previously known synchronizing pulse mixers have significant advantages. He no longer requires a separate power source for the electronic circuit 20 for mixing the horizontal and vertical synchronizing pulse. As a result, it can be built much smaller than the previously known synchronous pulse mixers. Thanks to this miniaturization, it is no longer necessary to install the sync pulse mixer in the personal computer. It can be connected externally.

Im weiteren hat der vorgeschlagene Synchronimpuls-Mischer den Vorteil, dass für seine Speisung keine zusätzlichen Steckdosen und entsprechende Stecker bereitgestellt werden müssen.Furthermore, the proposed synchronous pulse mixer has the advantage that no additional sockets and corresponding plugs have to be provided for its supply.

Dank der oben erwähnten Vorteile wird der vorgeschlagene Synchronimpuls-Mischer auf grosses Interesse stossen.Thanks to the advantages mentioned above, the proposed synchronous pulse mixer will be of great interest.

Claims (2)

  1. Output circuit for a video adapter of a personal computer, in which sync pulses (13, 14) enter the output circuit, with a sync pulse mixer (20) which mixes an incoming colour signal (2) and the sync pulses from the output circuit on one and the same line, wherein
    the sync pulse mixer (20) can be operated with electrical energy which is tapped from the sync pulses in the output circuit.
  2. Output circuit as claimed in Claim 1, wherein the energy from the horizontal (13) and the vertical sync pulses (14) is used.
EP93920641A 1992-12-17 1993-10-05 Synchronisation pulse mixer without power supply Revoked EP0627110B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH385192A CH685898A5 (en) 1992-12-17 1992-12-17 Output circuit for a video adapter of a personal computer with a sync pulse mixer without power
CH3851/92 1992-12-17
PCT/CH1993/000237 WO1994012970A1 (en) 1992-12-17 1993-10-05 Synchronisation pulse mixer without power supply

Publications (2)

Publication Number Publication Date
EP0627110A1 EP0627110A1 (en) 1994-12-07
EP0627110B1 true EP0627110B1 (en) 1995-12-20

Family

ID=4264844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93920641A Revoked EP0627110B1 (en) 1992-12-17 1993-10-05 Synchronisation pulse mixer without power supply

Country Status (4)

Country Link
EP (1) EP0627110B1 (en)
CH (1) CH685898A5 (en)
DE (1) DE59301217D1 (en)
WO (1) WO1994012970A1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322897B1 (en) * 1987-12-29 1997-10-08 Hitachi Chemical Co., Ltd. Simultaneous data and electric power transmitting/receiving system

Also Published As

Publication number Publication date
CH685898A5 (en) 1995-10-31
DE59301217D1 (en) 1996-02-01
EP0627110A1 (en) 1994-12-07
WO1994012970A1 (en) 1994-06-09

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