DE1190499B - Circuit for re-tuning the sinusoidal oscillating circuit of a line oscillator of television receivers - Google Patents
Circuit for re-tuning the sinusoidal oscillating circuit of a line oscillator of television receiversInfo
- Publication number
- DE1190499B DE1190499B DEST20487A DEST020487A DE1190499B DE 1190499 B DE1190499 B DE 1190499B DE ST20487 A DEST20487 A DE ST20487A DE ST020487 A DEST020487 A DE ST020487A DE 1190499 B DE1190499 B DE 1190499B
- Authority
- DE
- Germany
- Prior art keywords
- circuit
- retuning
- television receivers
- sinusoidal
- oscillator
- 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
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
- H04N5/126—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal indirectly commands a frequency generator
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
Schaltung zur Nachstimmung des Sinusschwingkreises eines Zeilenoszillators von Fernsehempfängern Die Erfindung betrifft eine Schaltung zur Nachstimmung des Sinusschwingkreises eines Zeilenoszillators von Fernsehempfängern, bei der der Sinusschwingkreis durch eine Transistorblindstufe mittels einer Nachstimmregelspannung nachgestimmt wird.Circuit for retuning the sinusoidal oscillating circuit of a line oscillator of television receivers The invention relates to a circuit for retuning the Sine oscillating circuit of a line oscillator in television receivers, in which the sine oscillating circuit retuned by a transistor dummy stage by means of a retuning control voltage will.
In Fernsehempfängern mit Röhrenbestückung verwendet man heute weitgehend zur vollautomatischen Horizontal-Synchronisierung eine sogenannte Phasen-und Frequenz-Vergleichsschaltung. Eine derartige Schaltung erzeugt im synchronisierten Zustand eine Regelspannung, die von der Phasenabweichung zwischen der Oszillatorspannung und der Synchronisierspannung abhängig ist. Im nichtsynchronisierten Zustand erzeugt sie außerdem eine Regelspannung, die von der Frequenzdifferenz der beiden Signale abhängig ist. Diese Phasen- und Frequenz-Vergleichsschaltungen sind im allgemeinen relativ hochohmig, ihr Ausgangswiderstand beträgt beispielsweise etwa 1,5 bis 2,0 MQ.In television receivers equipped with tubes, they are used extensively today a so-called phase and frequency comparison circuit for fully automatic horizontal synchronization. Such a circuit generates a control voltage in the synchronized state, that of the phase deviation between the oscillator voltage and the synchronizing voltage is dependent. In the unsynchronized state, it also generates a control voltage, which depends on the frequency difference between the two signals. This phase and Frequency comparison circuits are generally relatively high resistance, their output resistance is, for example, about 1.5 to 2.0 MQ.
Um in transistorisierten bzw. in teilweise transistorisierten Geräten eine solche Schaltung anwenden zu können, wurden bisher zwei hintereinandergeschaltete Impedanzwandler angewendet, um mit dieser hochohmigen Regelspannung eine Blindstufe ansteuern zu können.To in transistorized or in partially transistorized devices To be able to use such a circuit, two were previously connected in series Impedance converter used to create a dummy stage with this high-resistance control voltage to be able to drive.
Um den erheblichen Aufwand dieser bekannten Schaltung zu vermeiden, wird bei einer Schaltung zur Nachstimmung des Sinusschwingkreises eines Zeilenoszillators von Fernsehempfängern durch eine Transistorblindstufe mittels einer Nachstimmregelspannung erfindungsgemäß vorgeschlagen, in das Netzwerk zur Phasendrehung des Ansteuerstromes der Transistorblindstufe eine Kapazitätsdiode zu legen, der die Nachstimmregelspannung zugeführt wird.In order to avoid the considerable expense of this known circuit, is used in a circuit for retuning the sinusoidal oscillator circuit of a line oscillator of television receivers by means of a transistor dummy stage by means of a retuning control voltage proposed according to the invention, in the network for phase rotation of the control current to put a capacitance diode of the transistor dummy stage, which controls the retuning voltage is fed.
Eine solche Kapazitätsdiode ist beispielsweise eine Siliziumdiode, die im Sperrbereich betrieben wird. Eine Kapazitätsdiode allein ist jedoch nicht in der Lage, den relativ niederohmigen Schwingkreis eines Zeilenoszillators nachzustimmen. Es wird deshalb vorgesehen, eine solche Siliziumdiode mit einer Blindstufe derart zu verbinden, daß die Nachstimmdiode innerhalb eines Netzwerkes zur Phasendrehung des Basisstromes des Blindstufentransistors Verwendung findet. Auf diese Weise kann die Nachstimmwirkung der Kapazitätsdiode erheblich, z. B. achtzigfach, vergrößert werden.Such a capacitance diode is, for example, a silicon diode, which is operated in the restricted area. A varactor diode alone is not, however able to retune the relatively low-resistance resonant circuit of a line oscillator. It is therefore provided that such a silicon diode with a dummy stage to connect that the retuning diode within a network for phase rotation of the base current of the dummy stage transistor is used. That way you can the re-tuning effect of the varactor considerably, z. B. eighty times enlarged will.
Im folgenden sei die Erfindung an Hand der in den Zeichnungen wiedergegebenen Schaltungsbeispiele näher erläutert.In the following the invention is reproduced with reference to the drawings Circuit examples explained in more detail.
F i g. 1 zeigt eine erfindungsgemäße Schaltung. Darin ist 1 der Sinusoszillator, 2 der Sinusschwingkreis, 3 der Blindstufentransistor, mit 4 ist die Kapazitätsdiode bezeichnet. Dieser Diode wird über den Widerstand 5 die Regelspannung zugeführt. Das andere Ende der Kapazitätsdiode ist über den Widerstand 6 mit Masse verbunden. über den Koppelkondensator 7 wird der Kapazitätsdiode die Sinusspannung des Schwingkreises 2 zugeführt. Das andere Ende der Kapazitätsdiode ist über den Koppelkondensator 8 mit der Basis des Blindstufentransistors verbunden. Die Kapazitätsdiode bewirkt in Verbindung mit dem Basis-Eingangswiderstand des Blindstufentransistors eine Phasendrehung der Kreis-Sinusspannung um etwa 90°. Der Ableitwiderstand 9 liegt dabei parallel zum Basis-Eingangswiderstand, so daß seine Größe für die Basis-Sinusspannung ebenfalls mitbestimmend ist. Die Basis des Blindstufentransistors liegt an einer einstellbaren Vorspannung. Selbstverständlich kann man auch hier, wie man es oft bei Transistorstufen anwendet, zum Ausgleich von Transistortoleranzen eine relativ große Vorspannung vorsehen und mit einem RC-Glied im Emitterstromkreis eine Arbeitspunktstabilisierung bewirken.F i g. 1 shows a circuit according to the invention. 1 is the sinusoidal oscillator, 2 is the sinusoidal oscillating circuit, 3 is the dummy stage transistor, and 4 is the capacitance diode. The control voltage is fed to this diode via the resistor 5. The other end of the capacitance diode is connected to ground via the resistor 6. The sinusoidal voltage of the resonant circuit 2 is fed to the capacitance diode via the coupling capacitor 7. The other end of the capacitance diode is connected to the base of the dummy stage transistor via the coupling capacitor 8. In conjunction with the base input resistance of the dummy stage transistor, the capacitance diode causes the circular sinusoidal voltage to be phase rotated by around 90 °. The bleeder resistor 9 is parallel to the base input resistance, so that its size is also a determining factor for the base sinusoidal voltage. The base of the dummy stage transistor is connected to an adjustable bias voltage. Of course, as is often the case with transistor stages, a relatively large bias voltage can be provided to compensate for transistor tolerances and an RC element in the emitter circuit can be used to stabilize the operating point.
Die F i g. 2 gibt ein etwas abgeändertes Ausführungsbeispiel der Schaltung der F i g. 1 wieder. Für die gleichen Teile sind die gleichen Bezugszeichen wie in F i g. 1 verwendet. Zur Nachstimmung von Schwingkreisen mit besonders niedriger Impedanz, z. B. bei zusätzlich als Sinusoszillator selbstschwingenden Zeilenendstufen, ist in der Schaltung der F i g. 2 zur weiteren Verstärkung des Blindstromes eine zusätzliche Verstärkerstufe 10 vorgesehen.The F i g. FIG. 2 gives a somewhat modified embodiment of the circuit of FIG. 1 again. The same reference numerals as in FIG. 1 are used for the same parts. 1 used. To re-tune resonant circuits with particularly low impedance, e.g. B. with additional self-oscillating line output stages as a sinusoidal oscillator, is in the circuit of the F i g. 2 an additional amplifier stage 10 is provided for further amplification of the reactive current.
Claims (2)
Priority Applications (26)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1050427D GB1050427A (en) | 1963-04-09 | ||
| DEST20488A DE1177199B (en) | 1963-04-09 | 1963-04-09 | Self-oscillating horizontal deflection circuit, especially for television receivers |
| DEST20487A DE1190499B (en) | 1963-04-09 | 1963-04-09 | Circuit for re-tuning the sinusoidal oscillating circuit of a line oscillator of television receivers |
| DEST20731A DE1184794B (en) | 1963-04-09 | 1963-06-14 | Self-oscillating horizontal deflection circuit, especially for television receivers |
| DEST21167A DE1247382B (en) | 1963-04-09 | 1963-10-09 | Self-oscillating horizontal deflection circuit, especially for television receivers |
| DEP1270A DE1270082B (en) | 1963-04-09 | 1964-02-18 | Self-oscillating horizontal deflection circuit, especially for television receivers |
| US355761A US3358183A (en) | 1963-04-09 | 1964-03-30 | Auto-oscillating horizontal deflection circuitry particularly for television sets |
| US355698A US3370123A (en) | 1963-04-09 | 1964-03-30 | Afc circuit arrangement for fine-tuning the sine-oscillating circuit of a horizon tal oscillator in television sets |
| GB13824/64A GB1046857A (en) | 1963-04-09 | 1964-04-03 | Variable reactance transistor circuits for use in television receivers |
| NL6403622A NL6403622A (en) | 1963-04-09 | 1964-04-03 | |
| AT306864A AT243340B (en) | 1963-04-09 | 1964-04-08 | Circuit for re-tuning the sinusoidal oscillating circuit of a line oscillator in television receivers |
| BE646304D BE646304A (en) | 1963-04-09 | 1964-04-09 | |
| DK175264A DK110133C (en) | 1963-04-09 | 1964-04-09 | Circuit arrangement for fine tuning of the sine oscillation circuit of a line oscillator in television sets. |
| DK175364AA DK114783B (en) | 1963-04-09 | 1964-04-09 | Self-oscillating circuit for horizontal deflection, especially for televisions. |
| FR970316A FR1392149A (en) | 1963-04-09 | 1964-04-09 | Circuit arrangements for television receivers |
| BE646305D BE646305A (en) | 1963-04-09 | 1964-04-09 | |
| NL6403790A NL6403790A (en) | 1963-04-09 | 1964-04-09 | |
| DEST22344A DE1275104B (en) | 1963-04-09 | 1964-07-02 | Self-oscillating horizontal deflection circuit, especially for television receivers |
| NL6501861A NL6501861A (en) | 1963-04-09 | 1965-02-15 | |
| BE659825D BE659825A (en) | 1963-04-09 | 1965-02-17 | |
| FR5856A FR87324E (en) | 1963-04-09 | 1965-02-17 | Circuit arrangements for television receivers |
| GB26999/65A GB1091928A (en) | 1963-04-09 | 1965-06-25 | Electrical deflection circuits for cathode ray tubes |
| SE8750/65A SE300838B (en) | 1963-04-09 | 1965-07-02 | |
| FR23286A FR88362E (en) | 1963-04-09 | 1965-07-02 | Circuit arrangements for television receivers |
| BE666279D BE666279A (en) | 1963-04-09 | 1965-07-02 | |
| NL6508588A NL6508588A (en) | 1963-04-09 | 1965-07-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST20487A DE1190499B (en) | 1963-04-09 | 1963-04-09 | Circuit for re-tuning the sinusoidal oscillating circuit of a line oscillator of television receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1190499B true DE1190499B (en) | 1965-04-08 |
Family
ID=7458595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEST20487A Pending DE1190499B (en) | 1963-04-09 | 1963-04-09 | Circuit for re-tuning the sinusoidal oscillating circuit of a line oscillator of television receivers |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT243340B (en) |
| DE (1) | DE1190499B (en) |
| DK (1) | DK110133C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2208267A1 (en) * | 1972-02-22 | 1973-08-30 | Licentia Gmbh | SYNCHRONIZATION CIRCUIT FOR LINE DEFLECTION IN A TELEVISION RECEIVER |
-
1963
- 1963-04-09 DE DEST20487A patent/DE1190499B/en active Pending
-
1964
- 1964-04-08 AT AT306864A patent/AT243340B/en active
- 1964-04-09 DK DK175264A patent/DK110133C/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2208267A1 (en) * | 1972-02-22 | 1973-08-30 | Licentia Gmbh | SYNCHRONIZATION CIRCUIT FOR LINE DEFLECTION IN A TELEVISION RECEIVER |
Also Published As
| Publication number | Publication date |
|---|---|
| DK110133C (en) | 1969-06-16 |
| AT243340B (en) | 1965-11-10 |
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