DE2757643A1 - Channel selecting system with mechanical switches - has decimal and units counting wheel with pulse former and electronic memory - Google Patents

Channel selecting system with mechanical switches - has decimal and units counting wheel with pulse former and electronic memory

Info

Publication number
DE2757643A1
DE2757643A1 DE19772757643 DE2757643A DE2757643A1 DE 2757643 A1 DE2757643 A1 DE 2757643A1 DE 19772757643 DE19772757643 DE 19772757643 DE 2757643 A DE2757643 A DE 2757643A DE 2757643 A1 DE2757643 A1 DE 2757643A1
Authority
DE
Germany
Prior art keywords
channel
electronic memory
pulse
selector switch
selection system
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.)
Granted
Application number
DE19772757643
Other languages
German (de)
Other versions
DE2757643C2 (en
Inventor
Wilhelm Ferner
Alfred Gebhardt
Josef Ziegler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken Electronic GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19772757643 priority Critical patent/DE2757643C2/en
Publication of DE2757643A1 publication Critical patent/DE2757643A1/en
Application granted granted Critical
Publication of DE2757643C2 publication Critical patent/DE2757643C2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0254—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being transfered to a D/A converter
    • H03J5/0263—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being transfered to a D/A converter the digital values being held in an auxiliary non erasable memory
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • H03J5/0281—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer the digital values being held in an auxiliary non erasable memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

The channel counting system incorporates a turn wheel counter (10) with one wheel for the tens and another wheel for the digits. Each wheel is connected with a contact (11) which is closed and opened when each count is made and delivers an input (E) to an impulse forming device (12) comprising a capacitor three resistors and a transistor. Outgoing pulses from the output terminal (A) are injected into an electronic memory (13). The latter is connected by four lines to the channel switching unit 10. The circuit is esp. designed for the switching of news items from one channel to another in television screen monitoring.

Description

KanalwahlsgstemChannel selection guests

Die Erfindung betrifft ein Kanalwahlsystem für Geräte der Nachrichtentechnik, insbesondere Fernsehgeräte zur direkten Anwahl eines einzelnen Kanals aus einem Frequenzband mittels eines mechanisch betätigbaren Kanalwahlschalters und Speicherung desselben in einem dem Kanalwahlsystem zugehörigen elektronischen Speicher, wobei der Eanalwahlschalter mit einem zusätzlichen, mechanisch betätigbaren Kontakt ausgestattet ist, der bei jeder Kanalumschaltung einen Impul + rzeugt, der ermöglicht, daß die Information des eingestellten Kanals in einem dem Kanalwahlsystem zugehörigen elektronischen Speicher abgespeichert wird.The invention relates to a channel selection system for telecommunications equipment, in particular televisions for direct selection of a single channel from a Frequency band by means of a mechanically operated channel selector switch and storage the same in an electronic memory associated with the channel selection system, wherein the channel selector switch is equipped with an additional, mechanically operated contact which generates a pulse every time the channel is switched, which enables the Information about the set channel in an electronic device belonging to the channel selection system Memory is saved.

Bei einem bekannten Kanalwahlsystem dieser Art erfolgt die Kanalwahl durch Betätigen des Kanalwahlschalters und. zusätzliches Betätigen eines Speicherknopfes, damit der gewählte Kanal in den elektronischen Speicher eingegeben wird.In a known channel selection system of this type, the channel selection takes place by pressing the channel selector switch and. additional pressing of a memory button, so that the selected channel is entered into the electronic memory.

Aufgabe der vorliegenden Erfindung ist es, eine Möglichkeit zu finden, wie mit einem Kanalwahlschalter, unter Einsparung eines zusätzlich erforderlichen Speicherknopfes, wel- ches beim Suchen von empfangswürdigen Kanälen nach jeder Neueinstellung des Kanalwahlschalters betätigt werden muß, die einzelnen Kanäle eingeschaltet und gleichzeitig eingespeichert werden können.The object of the present invention is to find a way to as with a channel selector switch, saving an additionally required one Memory button, wel- ches when searching for channels with good reception must be actuated after each new setting of the channel selector switch, the individual Channels can be switched on and stored at the same time.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Kanalwahlschalter mit einem zusätzlichen, mechanisch betätigbaren Kontakt ausgestattet ist, der bei jeder Kanalumschaltung einen Impuls erzeugt, der ermöglicht, daß die Information des eingestellten Kanals in einem dem Kanalwahlsystem zugehörigen elektronischen Speicher abgespeichert wird.This object is achieved according to the invention in that the channel selector switch is equipped with an additional, mechanically actuated contact, which is used in each channel switching generates a pulse that enables the information of the set channel in an electronic device belonging to the channel selection system Memory is saved.

Damit eine Einspeicherung des vom zusätzlichen Kontakt des Kanalwahlschalters erzeugten Impulses im elektronischen Speicher auch bei sehr schnellem Umschalten des Kanalwahlschalters gewährleistet ist, wird in die Leitung des zusätzlichen Kontektes des Kanalwahlschalters zum elektronischen Speicher ein Impulsformglied eingeschaltet, welches unabhängig von der Länge des vom zusätzlichen Kontakt kommenden Impulses diesen um die Zeiteinheit von 100 bis 300 msek verlängert.This means that the additional contact of the channel selector switch is saved generated pulse in the electronic memory even when switching very quickly of the channel selector switch is guaranteed, is in the line of the additional contact of the channel selector switch to the electronic memory a pulse shaping element is switched on, which is independent of the length of the pulse coming from the additional contact this is extended by the time unit from 100 to 300 msec.

Vorteilhafte Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben: Figur 1 zeigt das erfindungsgemäße Kanalwahlsystem als Blockschaltbild, Figur 2 und Figur 3 zeigt Je ein Ausführungsbeispiel des in die Leitung des zusätzlichen Kontakts des Kanals wahl schalters zum elektronischen Speicher eingeschalteten Impulsformgliedes.Advantageous embodiments of the invention are shown in the drawing and are described in more detail below: Figure 1 shows the inventive Channel selection system as a block diagram, Figure 2 and Figure 3 each shows an embodiment of the in the line of the additional contact of the channel selector switch to the electronic Memory switched on pulse shaping element.

Figur 4 zeigt die Funktionsweise des Impulsformgliedes, wobei die Einschaltspannung UE in Abhängigkeit der Zeit t dargestellt ist.Figure 4 shows the mode of operation of the pulse shaping element, the Switch-on voltage UE is shown as a function of time t.

In Figur 1 ist ein Kanalwahlschalter 10 mit einem Radschalter für die Einer- und einem Radschalter für die Zehnerdezimalstelle der Kanalnummer dargestellt, der gerade auf die Kanalnummer 24 eingestellt ist. Der Kanalwahlschalter 10 ist über vier Verbindungsleitungen mit einem elektronischen Speicher 13 verbunden.In Figure 1 is a channel selection switch 10 with a wheel switch for the units and a wheel switch for the tens of decimal places of the channel number are shown, which is currently set to channel number 24. The channel selector switch 10 is connected to an electronic memory 13 via four connecting lines.

Die beiden zusätzlichen Kontakte 11, welche mit dem Kanalwahlschalter 10 Detätigt werden, sind mit einem Anschluß an den Eingang des Impulsformgliedes 12 und mit dem anderen Anschluß an Masse gelegt. Der Ausgang des Impulsformgliedes 12 ist mit dem Eingang des elektronischen Speichers 13 verbunde, In Figur 2 ist ein Ausführungsbeispiel eines solchen Impulsformgliedes 12 mit dem zusätzlichen Kontakt 11 des Kanalwahlschalters 10 dargestellt.The two additional contacts 11, which are connected to the channel selector switch 10 are detected with a connection to the input of the pulse shaping element 12 and connected to the other connection to ground. The output of the pulse shaping element 12 is connected to the input of the electronic memory 13, in FIG an embodiment of such a pulse shaping member 12 with the additional Contact 11 of the channel selector switch 10 is shown.

Beim Umschalten des Kanalwahlschalters 10 wird einer der beiden zusätzlichen Kontakte ii kurzzeitig geschlossen. Dadurch wird über dem Eingang E des Impulsformgliedes 12 der Kondensator C1 über den Widerstand R3 entladen. Der Transistor T1 wird leitend und am Ausgang A des Impulsformgliedes 12 wird ein Impuls abgegeben und in den elektronischen Speicher 13 eingespeichert. Die Zeitkonstante der Widerstände R1, R2 des Kondensators C1 ergibt die Impulsdauer. Nachdem der Kondensator C1 wieder aufgeladen ist wird der Transistor T1 gesperrt und am Ausgang A steht kein Impuls mehr an. Am Anschluß B des Impulsformgliedes 12 ist zur Betreibung desselben eine Batteriespannung von z. B. +5 Volt angelegt.When switching over the channel selector switch 10, one of the two additional Contacts ii closed briefly. This is above the input E of the pulse shaping element 12 the capacitor C1 discharged through the resistor R3. The transistor T1 becomes conductive and at the output A of the pulse shaping element 12, a pulse is emitted and in the electronic Memory 13 stored. The time constant of the resistors R1, R2 of the capacitor C1 gives the pulse duration. After the capacitor C1 is recharged the transistor T1 is blocked and there is no more pulse at output A. At the connection B of the pulse shaping element 12 is to operate the same a battery voltage of z. B. +5 volts applied.

In Figur 3 ist ein weiteres Ausführungsbeispiel eines Impulsformgliedes 12 dargestellt.In Figure 3 is a further embodiment of a pulse shaping element 12 shown.

Zunächst ist der Transistor T1 über den Widerstand R1 gesperrt. Durch Betätigung des Kanalwahlschalters 10 schließt (automatisch) einer der beiden zusätzlichen Kontakte 11 und über den Eingang E wird der Kondensator C1 über den Wider stand R3 geladen. Dadurch wird der Transistor T1 leitend und am Ausgang A wird ein Impuls abgegeben und in den elektronischen Speicher 13 eingegeben. Nach Offnung der Kontakte 11 wird der Kondensator C1 zunächst über die Widerstände R3, R2 und über die Emitter-Basis-Strecke wieder entladen.First, the transistor T1 is blocked via the resistor R1. By Actuation of the channel selector switch 10 closes (automatically) one of the two additional ones Contacts 11 and the input E, the capacitor C1 is stood on the counter R3 loaded. This makes transistor T1 conductive and a pulse is generated at output A. issued and entered into the electronic memory 13. After opening the contacts 11, the capacitor C1 is first via the resistors R3, R2 and via the emitter-base path discharged again.

Nach Erreichen der Schwellspannug der Emitter-Basis-Dioåe an der Basis des Transistors T1 fließt nach allmählichem Übergang der restliche Entladestrom des Kondensators ci über die Widerstände R3, R2 und R1. Der Transistor T1 wird wieder gesperrt und damit steht am Ausgang A kein Impuls mehr an Der Widerstand R3 ist ein Schutzwiderstand beim Aufladevorgang des Kondensators C1 und bestimmt die Aufladezeitkonstante: - lt LLaden - 3 0 Die Entledezeitkonstante in dem Zeitbereich, in welchem der Transistor leitend ist wird bestimmt durch die Serienschaltung der Widerstände R3 und R2: Entladen = (lot3 + R2) 1 In Figur 4 sind die Lade- und Entladevorgänge beim Schließen und Öffnen des zusätzlichen Kontaktes 11 durch Abbildung der Sinschaltspannung UE in Abhängigkeit der Zeit t dargestelltAfter reaching the threshold voltage of the emitter-base-Dioåe at the base of the transistor T1, the remaining discharge current flows after a gradual transition of the capacitor ci via the resistors R3, R2 and R1. The transistor T1 becomes again blocked and there is no longer any pulse at output A. The resistor R3 is a protective resistor during the charging process of the capacitor C1 and determines the charging time constant: - lt LLaden - 3 0 The unloading time constant in the time range in which the transistor Is conductive is determined by the series connection of resistors R3 and R2: Discharge = (lot3 + R2) 1 In Figure 4, the loading and unloading processes are when closing and Opening the additional contact 11 by mapping the sin switch voltage UE in Dependence of time t shown

Claims (3)

Patentansprüche (?j Kanalwahlsystem für Geräte der Nachrichtentechnik, insbesondere Fernsehgeräte zur direkten Anwahl eines einzelnen Kanals aus einem Frequenzband mittels eines mechanisch bebetätigbaren Kanalwahlschalters und Speicherung desselben in einem dem Kanalwahlsystem zugehörigen elektronischen Speicher, dadurch gekennzeichnet, daß der Kanalwahlschalter(10) mit einem zusätzlichen, mechanisch betätigbaren Kontakt (11) ausgestattet ist, der bei jeder ganalumschaltung einen Impuls erzeugt, der ermöglicht, daß die Information des gerade eingestellten Kanals in einem dem Kanalwahlsystem zugehörigen elektronischen Speicher (13) abgespeichert wird.Claims (? J channel selection system for telecommunications equipment, in particular televisions for direct selection of a single channel from a Frequency band by means of a mechanically operated channel selector switch and storage the same in an electronic memory belonging to the channel selection system, thereby characterized in that the channel selector switch (10) with an additional, mechanical actuatable contact (11) is equipped with each channel switching one Generates a pulse which enables the information of the currently tuned channel stored in an electronic memory (13) associated with the channel selection system will. 2. Kanalwahlsystem nach Anspruch 1, dadurch gekennzeichnet, daß in die Leitung des zusätzlichen Kontaktes (11) des Kanalwahlscbalters (10) zum elektronischen Speicher (13) ein Impulsformglied (12) eingeschaltet ist.2. Channel selection system according to claim 1, characterized in that in the line of the additional contact (11) of the channel selector switch (10) to the electronic Memory (13) a pulse shaping element (12) is switched on. 3. Kanalwahlsystem nach Anspruch 1 und 2, dadurch gekenr.-zeichnet, daß das Impulsformglied (12) den vom zusätzlichen Kontakt (11) kommenden Impuls um die Zeiteinheit von 100 bis 300 msek verlängert.3. channel selection system according to claim 1 and 2, characterized gekenr.-characterized, that the pulse shaping element (12) receives the pulse coming from the additional contact (11) extended by the time unit from 100 to 300 msec.
DE19772757643 1977-12-23 1977-12-23 Channel selection system Expired DE2757643C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772757643 DE2757643C2 (en) 1977-12-23 1977-12-23 Channel selection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772757643 DE2757643C2 (en) 1977-12-23 1977-12-23 Channel selection system

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Publication Number Publication Date
DE2757643A1 true DE2757643A1 (en) 1979-06-28
DE2757643C2 DE2757643C2 (en) 1981-09-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420424A1 (en) * 1994-06-10 1995-12-14 Bayerische Motoren Werke Ag Controlling transmitter memory of radio receiver for automatic tuning

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS ERMITTELT *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420424A1 (en) * 1994-06-10 1995-12-14 Bayerische Motoren Werke Ag Controlling transmitter memory of radio receiver for automatic tuning
DE4420424B4 (en) * 1994-06-10 2006-03-30 Bayerische Motoren Werke Ag Control method for a station memory of a radio receiver

Also Published As

Publication number Publication date
DE2757643C2 (en) 1981-09-17

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8327 Change in the person/name/address of the patent owner

Owner name: TELEFUNKEN ELECTRONIC GMBH, 7100 HEILBRONN, DE

8339 Ceased/non-payment of the annual fee