DE2854852A1 - Electronic tuner for TV receiver - tunes both filter and oscillator using auxiliary oscillators and analogue memories - Google Patents

Electronic tuner for TV receiver - tunes both filter and oscillator using auxiliary oscillators and analogue memories

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Publication number
DE2854852A1
DE2854852A1 DE19782854852 DE2854852A DE2854852A1 DE 2854852 A1 DE2854852 A1 DE 2854852A1 DE 19782854852 DE19782854852 DE 19782854852 DE 2854852 A DE2854852 A DE 2854852A DE 2854852 A1 DE2854852 A1 DE 2854852A1
Authority
DE
Germany
Prior art keywords
oscillator
frequency
tuner
assigned
filter circuits
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
DE19782854852
Other languages
German (de)
Other versions
DE2854852C2 (en
Inventor
Martin Dipl Ing Englmeier
Juergen Dipl Ing Seebeck
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.)
Microtune GmbH and Co KG
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 DE19782854852 priority Critical patent/DE2854852C2/en
Publication of DE2854852A1 publication Critical patent/DE2854852A1/en
Application granted granted Critical
Publication of DE2854852C2 publication Critical patent/DE2854852C2/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
    • H03J5/0272—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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range
    • H03J3/32—Arrangements for ensuring tracking with variable capacitors

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

The tuner has three auxiliary oscillators and analog memories assigned one to the input circuit and to both bandpass filters. During tuning, the input circuit and the two bandpass filters are first tuned one after another and these three filters made to oscillate briefly using the auxiliary oscillators associated with them. The frequencies are tuned via an appropriate dividing ratio in the phase locked loop. The programmable divider for each channel not only has dividing ratio appropriate for the oscillator frequency but also a dividing ratio belonging to the input frequency between which it can be changed over, depending on the tuning of the input circuits or the oscillator.

Description

Elektronische Abstimmeinheit, ins-Electronic voting unit, in particular

besondere für Fernseh-Empfangsgeräte Die vorliegende Erfindung bezieht sich auf eine elektronische Abstimmeinheit für Geräte der Nachrichtentechnik, insbesondere Fernseh-Empfangsgeräte, unter Anwendung des als Frequenznachregelschr ltung dienenden PLL-Systems (Phase locked-loop), indem von einem mittels einer Abstimmapannung abstimmbaren Tuner die Oszillatorfrequenz einem programmierbarem Teiler zugeführt und die so erhaltene Freqeunz in ei.-nem Vergleicher mit einer Referenzfrequenz verglichen und die daraus erhaltene Regelspannung dem Oszillator des Tuners als Spannung UD zugeführt wird, sowie der Anwendung eines als Umprogrammiereinheit dienenden Bestwertspeichers R,O,M, (Read only memory) dem von einem Kanaleinsteller Signale digital codiert eingegeben werden können, die in der Umprogrammiereinheit in ein diesem Kanal zugeordnetes Teilerverhältnis umcodiert und dem programmierbaren Teiler eingegeben werden können.particular for television receivers The present invention relates to on an electronic voting unit for telecommunications equipment, in particular Television receivers, using the frequency readjustment device PLL system (phase locked-loop) by being tunable by means of a tuning voltage Tuner fed the oscillator frequency to a programmable divider and the so obtained Freqeunz compared in a comparator with a reference frequency and the control voltage obtained therefrom to the tuner's oscillator as voltage UD is supplied, as well as the use of a best value memory serving as a reprogramming unit R, O, M, (Read only memory) where signals are digitally coded by a channel setter can be entered, which is assigned to this channel in the reprogramming unit Divider ratio can be recoded and entered into the programmable divider.

Bei einer bekannten elektronischen Abstimmeinheit für Fernseh-Empfangsgeräte dieser Art erfolgt die Abstimmung des Oszillators unter Anwendung des als Frequenznachregelschaltung dienenden PLL-Systems, Die übrigen Kreise werden mit der gleichen UD Diodenspannung nachgezogen. Diese Art der elektronischen Abstimmung hat den Nachteil, daß im Tuner alle Kreise durch Hochfrequenzabgleich über das gesamte Band in Gleichlauf gebracht werden müssen Hierzu sind umfangreiche Maßnahmen durch einen großen Meß- und AbaeichauSwand an nedem produzierten Bauelemententeil erforderlich, Der Erfindung liegt die Aufgabe zugrunde eine elektronische Abstimmeinheit für Geräte der Nachrichtentechnik, insbesondere Fernseh-Empfangsgeräte, unter Anwendung des als Frequenznachregelschaltung dienenden PLL-Systems zu finden, welche nicht nur den Oszillator des Tuners, sondern auch die Filterkreise abgestimmt Diese Aufgabe wird durch die im Patentanspruch 1 angegebene Erfindung gelöst.In a known electronic voting unit for television receivers In this way, the oscillator is tuned using the frequency adjustment circuit serving PLL system, the other circuits are with the same UD diode voltage followed. This type of electronic tuning has the disadvantage that in the tuner all circles synchronized over the entire band by high frequency adjustment This requires extensive measures through a large measuring and AbaeichauSwand required on each component part produced. The object of the invention is based on an electronic voting unit for telecommunications equipment, in particular Television receivers, using the one used as a frequency adjustment circuit PLL system to find which not only the oscillator of the tuner but also the filter circuits matched Invention solved.

Eine vorteilhafte Weiterbildung bzw. Ausgestaltung des Erfindungagedankens ergibt sich aus dem Unteranspruch 2.An advantageous further development or embodiment of the idea of the invention results from subclaim 2.

Mit der elektronischen Abstimmeinheit nach der Erfindung werden beliebig viele Kreise des Tuners in jedem Kanai exakt abgestimmt. Umfangreiche Maßnahmen durch großen Meß- und Abgleichaufwand entfallen.With the electronic voting unit according to the invention are arbitrary many circles of the tuner precisely matched in each channel. Comprehensive measures due to the large measurement and adjustment effort.

Die Zeichnungen zeigen Blockschaltbilder der Erfindung.The drawings show block diagrams of the invention.

Figur 1 zeigt das Blockschaltbild. einer elektronischen Abstimmeinheit, unter Anwendung des als Frequenznachregel- schaltung dienenden PLL-Systems, bei welchem lediglich der Oszillator des Tuners abgestimmt wird Figur 2 und 3 zeigen je ein Ausfahrungsbeispiel der erfindungsgemäßen elektronischen Abstimmeinheiten als Blockschaltbilder.Figure 1 shows the block diagram. an electronic voting unit, using the frequency readjustment circuit serving PLL system, in which only the oscillator of the tuner is tuned, Figures 2 and 3 show one embodiment of each of the electronic voting units according to the invention as block diagrams.

Gemäß dem Blockschaltbild nach Figur 1 gelangt das Hochfrequenzeingangssignal über den Vorkreis der Vorstufe und das Bandfilter an den Mischer des Tuners, welcher mit dem Oszillator das Eingangssignal auf die gXnschte Zwischenfrequenz umsetzt. Ein Teil der Oszillatorleistung geht in den dargestellten programmierbaren Teiler. Die Ausgangsfrequenz des programmierbaren Teilers wird mit der Frequenz eines Quarzoszillators verglichen Der Vergleicher erzeugt eine Abstimmspannung die sowohl dem Qszillatdr des Tuners. als auch dem Vorkreis und dem Bandfilter zugeführt wird.According to the block diagram according to FIG. 1, the high-frequency input signal arrives Via the pre-circuit of the pre-stage and the band filter to the mixer of the tuner, which converts the input signal to the desired intermediate frequency with the oscillator. Part of the oscillator power goes into the programmable divider shown. The output frequency of the programmable divider is the frequency of a crystal oscillator compared The comparator generates a tuning voltage which is used by both the oscillator of the tuner. as well as the pre-circuit and the band filter.

Gemäß dem Blockschaltbild nach Figur 2 durchläuft das-Hochfrequenz-Eingangssignal den selben Weg wie in Figur 1. Abweichend von Figur 1 werden während der Abstimmphase von einer Ablaufsteuerung nacheinander zunächst die Hilfsoszillatoren 1 bis 3 kurzzeitig eingeschaltet. Der Ausgang der Ablaufsteuerung schaltet den Festwertpeicher R.O.M. um, so daß ein der Kreisfrequenz zugehöriges Teilerverhältnis ein gestellt wird, gleichzeitig wird das Ausgangssignal der Hilfsoszillatoren 1, 2, 3 über den elektronischen Schalter I an den Eingang des programmierbaren Teilers gelegt Die Abstimmspannung aus dem Vergleicher schaltet der elektronische Schalter II an die Eingänge der Analogapeicher 1 bis 3 Die Ubernabmesteuerungsleitungen steuern synchron zu den jeweils angestoßenen Hilfsoszillatoren 1, 2 und 3 und übernehmen die Abstimmapannung in die Analogspeicher 1, 2 und 3 . Der gespeicherte Spannungswert steht am Ausgang des jeweiligen Analogspeichers und gelangt von da an die Abstimmdioden des Vorkreises und des Bandfilters, Danach schaltet die Ablaufsteuerung über die Ausgangsleitung einen Teil der Oszillatorenergie des Tuners über den elektronischen Schalter I an den programmierbaren Teiler, den Festwertspeicher R.O.M, auf ein zur Tuneroszillatorfrequenz passendes Teilerverhältnis und die Abstimmspannung über den elektronischen Schalter II an die Abstimmdiode des Oszillators des Tuners Die elektronische Abstimmeinheit gemäß Figur 3 entspricht von der Funktion her größtenteils der von Figur 2. Abweichend wird hier bei Abstimmung der Kreise über den Ausgang der Ablaufsteuerung ein Mischer (5) und ein zugehöriger Oszillator (4) mit 36,15 PEz zur Umsetzung der Kreisfreqeunz auf die Oszillatorfrequenz eingeschaltet,According to the block diagram of FIG. 2, the high-frequency input signal passes through the same way as in Figure 1. Deviating from Figure 1, during the tuning phase First the auxiliary oscillators 1 to 3 briefly one after the other from a sequence control switched on. The output of the sequence control switches the read-only memory R.O.M. so that a division ratio associated with the angular frequency is set, at the same time, the output signal of the auxiliary oscillators 1, 2, 3 via the electronic Switch I applied to the input of the programmable divider The tuning voltage The electronic switch II switches from the comparator to the inputs of the analog tape recorders 1 to 3 The overdrive control lines control synchronously to the each triggered auxiliary oscillators 1, 2 and 3 and take over the tuning voltage into analog memories 1, 2 and 3. The stored voltage value is available at the output of the respective analog memory and from there it reaches the tuning diodes of the pre-circuit and the band filter, then the sequence control switches over the output line part of the oscillator energy of the tuner via the electronic switch I. the programmable divider, the read-only memory R.O.M, to one to the tuner oscillator frequency suitable divider ratio and the tuning voltage via the electronic switch II to the tuning diode of the oscillator of the tuner The electronic tuning unit according to FIG. 3 largely corresponds to that of FIG. 2 in terms of function becomes a mixer when the circles are coordinated via the output of the sequence control (5) and an associated oscillator (4) with 36.15 PEz to implement the circular frequency switched to the oscillator frequency,

Claims (2)

Patentansprüche k Elektronische Abstimmeinheit für Geräte der Nachrichtentechnik, insbesondere Fernseh-Empfangsgeräte, unter Anwendung des als Frequenznachregelschaltung dienenden PLL-Systems (Phase locked-loop), indem von einem mittels einer Abstimmspannung abstimmbaren Tuner die Oszillatorfrequenz einem programmierbarem Teiler zugeführt und die so erhaltene Frequenz in einem Vergleicher mit einer Referenzfrequenz verglichen und die daraus erhaltene Regelspannung dem Oszillator des Tuners als Spannung UD zugeführt wird, sowie der Anwendung eines als Umprogrammiereinheit dienenden Festwertspeichers R,O,M, (Read only memory) dem von einem Eanaleinsteller Signale digital codiert eingegeben werden können, die in der Umprogrammiereinheit in ein diesem kanal zueeordnetes Teilerverhältnis umcodiert und dem programmierbaren Teiler eingegeben werden können ? dadurch Sekennzeichnet daß dem Vorkreis und den beiden Bandfilterkreisen jeweils ein Hilfsoszillator und ein Analogspeicher zugeordnet ist, wobei während des Abstimmvorgangs zunächst nacheinander der Vorkreis und die beiden Bandfilterkreise abgestimmt werden und diese drei Filterkreise durch die drei ihnen zugeordneten Hilfsoszillatoren kurzzeitig zum Schwingen gebracht werden und die jeweilige Frequenz über ein entsprechendes Teilerverhältnis im PLL-Systen abgestimmt werden, wobei dem programmierbaren Teiler für beiden Kanal nicht nur ein zur Oszillatorfrequenz passendes, sondern auch ein zur Eingangsfrequenz gehöriges Teilerverhältnis zugeordnet ist, welches umgeschaltet werden kann, åe nach Abstimmung der Eingangskreise oder des Oszillators des Tuners Claims k Electronic voting unit for telecommunications equipment, in particular television receivers, using the as a frequency adjustment circuit Serving PLL system (phase locked-loop) by using a tuning voltage tunable tuner fed the oscillator frequency to a programmable divider and the frequency thus obtained is compared with a reference frequency in a comparator and the control voltage obtained therefrom to the tuner's oscillator as voltage UD is supplied, as well as the use of a read-only memory serving as a reprogramming unit R, O, M, (Read only memory) to which signals are digitally encoded by an channel adjuster can be entered that are assigned to this channel in the reprogramming unit Divider ratio can be recoded and entered into the programmable divider ? characterized in that the pre-circuit and the two band filter circuits, respectively an auxiliary oscillator and an analog memory are assigned, whereby During the tuning process, first the pre-circuit and the two band filter circuits one after the other are matched and these three filter circuits by the three assigned to them Auxiliary oscillators are made to vibrate briefly and the respective frequency be matched via a corresponding divider ratio in the PLL system, with the programmable divider for both channels not just one for the oscillator frequency appropriate divider ratio, but also a divider ratio associated with the input frequency which can be switched, åe after coordination of the input circuits or of the tuner's oscillator 2. Elektronische Abstimmeinheit nach Anspruch 1, dadurch gekennzeichnet, daß dem Vorkreis und den beiden Bandfilterkreisen jeweils ein Hilfsoszillator und ein Analogspeicher zugeordnet ist, wobei während des Abstimmvorgangs zunächst nacheinander der Vorkreis und die beiden Bandfilterkreise abgestimmt werden und diese drei Filterkreise durch die drei ihnen'zugeordneten Hilfsoszillatoren kurzzeitig zum Schwingen gebracht werden und die jeweilige Frequenz mit einer von einem Oszillator (4) erzeugten Frequenz von 36,15 NHz in dem zwischen dem elektronischen Schalter I und dem programmierbaren Teiler eingeschalteten Mischer (5) gemischt und im PLL-System abgestimmt werden und sich die einstellenden Diodenspannungen UD1-3 in den drei ihnen zugeordneten Analogapeicher "festgehalten" werden und der Oszillator des Tuners im PLL-System abgestimmt und lphasenstarr festgehalten" wird.2. Electronic voting unit according to claim 1, characterized characterized in that the pre-circuit and the two band filter circuits each have an auxiliary oscillator and an analog memory is assigned, initially during the tuning process one after the other the pre-circuit and the two band filter circuits are matched and briefly these three filter circuits by the three auxiliary oscillators assigned to them be made to vibrate and the respective frequency with one of an oscillator (4) generated frequency of 36.15 NHz in the one between the electronic switch I and the programmable divider switched on mixer (5) mixed and in the PLL system be matched and the setting diode voltages UD1-3 in the three the analog tape recorders assigned to them are "held" and the tuner's oscillator matched in the PLL system and locked in phase ".
DE19782854852 1978-12-19 1978-12-19 Electronic voting unit, in particular for television receivers Expired DE2854852C2 (en)

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DE19782854852 DE2854852C2 (en) 1978-12-19 1978-12-19 Electronic voting unit, in particular for television receivers

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Application Number Priority Date Filing Date Title
DE19782854852 DE2854852C2 (en) 1978-12-19 1978-12-19 Electronic voting unit, in particular for television receivers

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DE2854852A1 true DE2854852A1 (en) 1980-07-10
DE2854852C2 DE2854852C2 (en) 1985-02-07

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034064A2 (en) * 1980-02-11 1981-08-19 Decca Limited Adjustable and selective electrical filters and methods of tuning them
DE3125725A1 (en) * 1980-06-30 1982-03-04 RCA Corp., 10020 New York, N.Y. "MULTIPLEX ARRANGEMENT FOR A MULTIPLE VOLTAGE CONTROLLED FILTER"
DE3236162A1 (en) * 1982-09-30 1984-04-05 Rainer Dipl.-Ing. 6500 Mainz Bermbach Self-tuning narrow-band receiver
DE3242965C1 (en) * 1982-11-20 1984-05-30 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Tuning unit for telecommunications equipment
DE3303711A1 (en) * 1983-02-04 1984-08-16 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen VOTING UNIT FOR TELECOMMUNICATIONS DEVICES
DE3306401C1 (en) * 1983-02-24 1984-08-23 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Circuit arrangement for the adjustment of a frequency-selective electronic measurement object
DE3308690A1 (en) * 1983-03-11 1984-09-13 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen METHOD FOR TUNING THE VIBRATION CIRCLES OF A MESSAGE RECEIVER
DE3347132C1 (en) * 1983-12-27 1985-07-04 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Automatic adjustment system for a tuner of a television receiver
EP0147518A2 (en) * 1983-09-07 1985-07-10 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. Aligning method for a multistage selective amplifier and circuit arrangement for carrying it out
DE3406150A1 (en) * 1984-02-21 1985-08-22 Telefunken electronic GmbH, 7100 Heilbronn CONTROL CIRCUIT TO TUNE A HIGH FREQUENCY INPUT CIRCUIT
DE3505183A1 (en) * 1985-02-15 1986-11-27 Loewe Opta Gmbh, 8640 Kronach Frequency converter for community antenna systems and cable distribution networks with an input converter and an output converter
NL8700467A (en) * 1986-02-25 1987-09-16 Plessey Overseas IMPROVEMENTS IN OR CONCERNING TUNING AND VOLTAGE GENERATORS THEREFOR.
EP0473120A2 (en) * 1990-08-30 1992-03-04 Matsushita Electric Industrial Co., Ltd. Double super-heterodyne tuner
DE4332798A1 (en) * 1993-09-27 1995-03-30 Telefunken Microelectron Circuit arrangement for a tunable resonant circuit

Families Citing this family (4)

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DE3609349C3 (en) * 1985-03-22 1994-09-15 Victor Company Of Japan Superhet TV tuner
DE19540139C2 (en) * 1995-10-27 1999-06-02 Endress Hauser Gmbh Co Procedure for setting the center frequency of a bandpass filter
DE102006035102B4 (en) * 2006-07-28 2016-04-07 Sivantos Gmbh Hearing aid with a transceiver system
US8358795B2 (en) 2006-07-28 2013-01-22 Siemens Audiologische Technik Gmbh Receiver system and method for transmitting information for an otological device

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DE2814577A1 (en) * 1978-04-05 1979-10-11 Nordmende Radio receiver with microcomputer - generating control signals for input and main tuning circuits and controlling changeover
DE2834231A1 (en) * 1978-08-04 1980-02-28 Blaupunkt Werke Gmbh Synchronisation of oscillator with input circuit of superhet receiver - sorting control voltages for input circuit corresp. to those of oscillator

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US3736512A (en) * 1972-02-24 1973-05-29 Us Navy Non-interfering on-line communication receiver test system
DE2814577A1 (en) * 1978-04-05 1979-10-11 Nordmende Radio receiver with microcomputer - generating control signals for input and main tuning circuits and controlling changeover
DE2834231A1 (en) * 1978-08-04 1980-02-28 Blaupunkt Werke Gmbh Synchronisation of oscillator with input circuit of superhet receiver - sorting control voltages for input circuit corresp. to those of oscillator

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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034064A2 (en) * 1980-02-11 1981-08-19 Decca Limited Adjustable and selective electrical filters and methods of tuning them
EP0034064A3 (en) * 1980-02-11 1981-12-30 Decca Limited Adjustable and selective electrical filters and methods of tuning them
DE3125725A1 (en) * 1980-06-30 1982-03-04 RCA Corp., 10020 New York, N.Y. "MULTIPLEX ARRANGEMENT FOR A MULTIPLE VOLTAGE CONTROLLED FILTER"
DE3236162A1 (en) * 1982-09-30 1984-04-05 Rainer Dipl.-Ing. 6500 Mainz Bermbach Self-tuning narrow-band receiver
DE3242965C1 (en) * 1982-11-20 1984-05-30 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Tuning unit for telecommunications equipment
DE3303711A1 (en) * 1983-02-04 1984-08-16 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen VOTING UNIT FOR TELECOMMUNICATIONS DEVICES
WO1984003184A1 (en) * 1983-02-04 1984-08-16 Thomson Brandt Gmbh Tuning unit for communication system
EP0116350A1 (en) * 1983-02-04 1984-08-22 Deutsche Thomson-Brandt GmbH Tunig unit for communication apparatus
DE3306401C1 (en) * 1983-02-24 1984-08-23 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Circuit arrangement for the adjustment of a frequency-selective electronic measurement object
EP0117499A2 (en) * 1983-02-24 1984-09-05 Deutsche Thomson-Brandt GmbH Circuit arrangement for measuring and detecting a maximum voltage output
EP0117499A3 (en) * 1983-02-24 1986-01-02 Deutsche Thomson-Brandt Gmbh Circuit arrangement for measuring and detecting a maximum voltage output
DE3308690A1 (en) * 1983-03-11 1984-09-13 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen METHOD FOR TUNING THE VIBRATION CIRCLES OF A MESSAGE RECEIVER
EP0119561A2 (en) * 1983-03-11 1984-09-26 Deutsche Thomson-Brandt GmbH Method of tuning the resonant circuits of a radio receiver
EP0119561A3 (en) * 1983-03-11 1985-12-04 Deutsche Thomson-Brandt Gmbh Method of tuning the resonant circuits of a radio receiver
EP0147518A2 (en) * 1983-09-07 1985-07-10 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. Aligning method for a multistage selective amplifier and circuit arrangement for carrying it out
EP0147518A3 (en) * 1983-09-07 1986-12-30 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig Holland. Stiftung & Co. Kg. Aligning method for a multistage selective amplfifier and circuit arrangement for carrying it out
DE3347132C1 (en) * 1983-12-27 1985-07-04 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Automatic adjustment system for a tuner of a television receiver
EP0148389A2 (en) * 1983-12-27 1985-07-17 Deutsche Thomson-Brandt GmbH Tuning system for a television receiver
EP0148389A3 (en) * 1983-12-27 1987-04-01 Deutsche Thomson-Brandt Gmbh Tuning system for a telecommunication apparatus
US4956711A (en) * 1983-12-27 1990-09-11 Deutsche Thompson-Brandt Gmbh Automatic balancing system for communications receiver apparatus
DE3406150A1 (en) * 1984-02-21 1985-08-22 Telefunken electronic GmbH, 7100 Heilbronn CONTROL CIRCUIT TO TUNE A HIGH FREQUENCY INPUT CIRCUIT
US4760535A (en) * 1984-02-21 1988-07-26 Telefunken Electronic Gmbh Control circuit for tuning a high-frequency input circuit
DE3505183A1 (en) * 1985-02-15 1986-11-27 Loewe Opta Gmbh, 8640 Kronach Frequency converter for community antenna systems and cable distribution networks with an input converter and an output converter
NL8700467A (en) * 1986-02-25 1987-09-16 Plessey Overseas IMPROVEMENTS IN OR CONCERNING TUNING AND VOLTAGE GENERATORS THEREFOR.
EP0473120A2 (en) * 1990-08-30 1992-03-04 Matsushita Electric Industrial Co., Ltd. Double super-heterodyne tuner
EP0473120A3 (en) * 1990-08-30 1992-11-04 Matsushita Electric Industrial Co., Ltd. Double super-heterodyne tuner
DE4332798A1 (en) * 1993-09-27 1995-03-30 Telefunken Microelectron Circuit arrangement for a tunable resonant circuit

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