DE2125448B2 - Circuit arrangement for changing the frequency of a controllable oscillator - Google Patents
Circuit arrangement for changing the frequency of a controllable oscillatorInfo
- Publication number
- DE2125448B2 DE2125448B2 DE2125448A DE2125448A DE2125448B2 DE 2125448 B2 DE2125448 B2 DE 2125448B2 DE 2125448 A DE2125448 A DE 2125448A DE 2125448 A DE2125448 A DE 2125448A DE 2125448 B2 DE2125448 B2 DE 2125448B2
- Authority
- DE
- Germany
- Prior art keywords
- oscillator
- stage
- circuit arrangement
- field effect
- frequency
- 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
Links
- 230000005669 field effect Effects 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 4
- 101150087426 Gnal gene Proteins 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 239000010453 quartz Substances 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
- H03B5/366—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device and comprising means for varying the frequency by a variable voltage or current
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/44—Colour synchronisation
- H04N9/45—Generation or recovery of colour sub-carriers
Landscapes
- Processing Of Color Television Signals (AREA)
- Networks Using Active Elements (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
zugspotential 13, z.B. an Masse, gelegt ist. Die Drain-Elektrode des Feldeffekt-Transistors4 ist direkt mit einem galvanisch von einer Betriebsspannungsquelle getrennten Nachsteuereingang 7 des steuerbaren Oszillators 1 verbunden. Im Source-Elektrodenzweig dagegen ist eia Gleichspannungsteiler angeordnet, toaos drei Widerständen 8,\ 10 besteht und dazu dient, eine Arbeitskennlinie des Feldeffekt-Transistors 4 einzustellen. Der deichspannungsteiler 8, 9, 10 verbindet die Source-Elektrode nut dem Bezugspotential 13 des Nachstimmeingangs 7. Weiterhin ist der Gleichspannungsteilcr 8, 9, 10 durch einen Kondensator 11 überbrückt. Während des Betriebes wird der Vergleichsschaltung2 am Eingang 12 das Bezugssignal, z.B. der Burst, und über die Leitung 3 das Osziilatorsignal des steuerbaren Oszillators I zugeführt. Weichen die beiden Signale voneinander ab, entsteht am Aus-2ang 5 der Vergleichseinrichtung 2 Jne Steuerspaniiung. Diese Steuerspannung steuert die Gate-EIektrode des ^^^^ Widerstand des f-eldUteki ii™ so daß der tensile potential 13, for example to ground, is applied. The drain electrode of the field effect transistor 4 is connected directly to a readjustment input 7 of the controllable oscillator 1 that is galvanically separated from an operating voltage source. In the source electrode branch, however, a DC voltage divider is arranged, toaos three resistors 8, \ 10 and is used to set an operating characteristic of the field effect transistor 4. The dike voltage divider 8, 9, 10 connects the source electrode to the reference potential 13 of the retuning input 7. Furthermore, the DC voltage divider 8, 9, 10 is bridged by a capacitor 11. During operation, the comparison circuit 2 is supplied with the reference signal, for example the burst, at the input 12 and the oscillator signal of the controllable oscillator I is supplied via the line 3. If the two signals from one another, arises at the training 2 HS 5 of the comparator 2 Jne Steuerspaniiung. This control voltage controls the gate electrode of the ^^^^ resistor of the f-eldUteki ii ™ so that the
sprechend der Steuerspannimg « > B Speaking of the control voltage «> B
steuerbare Oszillator 1 entsprechend dem Bezuo.controllable oscillator 1 according to the reference o .
signal nachgesteuert wird. pHdeffekt-Transi-signal is readjusted. pHdefect transit
An der Drain-Elektrode Js Fcldettekt Iransi stors4 liegt das Osz.llators.gnal ^taand« Do den-Kennlinie des Transistors 4 8l«chgOTCütel w rü und je nach Größe des Wid«*™b«ertes des,FM The oscillators.gnal ^ taand «Do den characteristic of the transistor 4 8l« chgOTCütelw rü and, depending on the size of the value of the FM
effekt-Transistors 4 einen mittlere" Ja^ Jes nungswert bildet. Der zeiuicn> Drain-Source-Widerstandes ist abhängig von de,Effect transistor 4 forms a mean "Yes ^ Jes voltage value. The zeiuicn> drain-source resistance depends on the
Gate-Source-Spannung, deren Große durch,°;^J erspannung bestimmt wird Entsprechend der ^ unK-tion des Feldeffekt-Trans.stors4 .n_der beschriebe nen Schaltung kann von einem PJ™^h„£e™r n Betrieb des Feldeffekt-Trans.stors 4 gesprochen werGate-source voltage, the magnitude of which is determined by the voltage. According to the function of the field effect trans.stors4 .n_the circuit described, a PJ ™ ^ h "£ e ™ r n operation of the field effect -Trans.stors 4 who spoke
den. , , - t h in porrn the. ,, - t h in porrn
Eine erfindungsgemaße Schaltung ist auch in FormA circuit according to the invention is also in shape
einer integrierten Schaltung anwenaoai.an integrated circuit anwenaoai.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (5)
Widerstand derart geschaltet ist, daß die Gate- In einer derartigen Reaktanzstufe wird heute1. Circuit arrangement for changing which is fed to a reactance stage. The control span frequency of a controllable oscillator, in particular influences the reactance stage in such a way that the other for a frequency- and phase-controlled capacitance of the oscillator circuit of the oscillator is characterized, and in that the oscillator signal is characterized by a field effect transistor (4) is readjusted as controllable speaking to the reference signal.
Resistance is connected in such a way that the gate is in such a reactance stage today
Farbfernsehempfänger wird als Farblräger-Regene- Zwischen einem steuerbaren Oszillator 1 und einerFrequency and phase identical oscillator signal of the circuit arrangement according to the invention can also be generated without power, the aforementioned type. Generation 60 Using an example, an inventive or recovery of the reference signal in a circuit arrangement is explained in more detail.
Color television receiver is called color carrier Regene- between a controllable oscillator 1 and a
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2125448A DE2125448B2 (en) | 1971-05-22 | 1971-05-22 | Circuit arrangement for changing the frequency of a controllable oscillator |
ZA723452A ZA723452B (en) | 1971-05-22 | 1972-05-19 | A circuit arrangement for the variation of the frequency of a controllable oscillator |
AT440172A AT313386B (en) | 1971-05-22 | 1972-05-19 | Circuit arrangement for changing the frequency of a controllable oscillator |
IT50387/72A IT957979B (en) | 1971-05-22 | 1972-05-20 | CIRCUIT ARRANGEMENT FOR THE VARIATION OF THE FREQUENCY OF A CONTROLLABLE OSCILLATOR |
GB2404272A GB1395251A (en) | 1971-05-22 | 1972-05-22 | Controlled oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2125448A DE2125448B2 (en) | 1971-05-22 | 1971-05-22 | Circuit arrangement for changing the frequency of a controllable oscillator |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2125448A1 DE2125448A1 (en) | 1972-11-30 |
DE2125448B2 true DE2125448B2 (en) | 1974-02-21 |
DE2125448C3 DE2125448C3 (en) | 1974-09-19 |
Family
ID=5808629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2125448A Granted DE2125448B2 (en) | 1971-05-22 | 1971-05-22 | Circuit arrangement for changing the frequency of a controllable oscillator |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT313386B (en) |
DE (1) | DE2125448B2 (en) |
GB (1) | GB1395251A (en) |
IT (1) | IT957979B (en) |
ZA (1) | ZA723452B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1984000089A1 (en) * | 1982-06-14 | 1984-01-05 | Western Electric Co | Timing recovery circuit |
-
1971
- 1971-05-22 DE DE2125448A patent/DE2125448B2/en active Granted
-
1972
- 1972-05-19 AT AT440172A patent/AT313386B/en active
- 1972-05-19 ZA ZA723452A patent/ZA723452B/en unknown
- 1972-05-20 IT IT50387/72A patent/IT957979B/en active
- 1972-05-22 GB GB2404272A patent/GB1395251A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2125448A1 (en) | 1972-11-30 |
IT957979B (en) | 1973-10-20 |
DE2125448C3 (en) | 1974-09-19 |
ZA723452B (en) | 1973-03-28 |
GB1395251A (en) | 1975-05-21 |
AT313386B (en) | 1974-02-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E771 | Valid patent as to the heymanns-index 1977, willingness to grant licences | ||
EHJ | Ceased/non-payment of the annual fee |