GB944161A - Improvements in or relating to oscillator synchronizing circuit arrangements - Google Patents
Improvements in or relating to oscillator synchronizing circuit arrangementsInfo
- Publication number
- GB944161A GB944161A GB1197759A GB1197759A GB944161A GB 944161 A GB944161 A GB 944161A GB 1197759 A GB1197759 A GB 1197759A GB 1197759 A GB1197759 A GB 1197759A GB 944161 A GB944161 A GB 944161A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sawtooth
- gate circuit
- oscillator
- output
- flyback
- 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.)
- Expired
Links
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)
- Circuit Arrangements For Discharge Lamps (AREA)
- Synchronizing For Television (AREA)
Abstract
944,161. Automatic phase control systems. RANK-BUSH MUBPHY Ltd. April 11, 1960 [April 9, 1959], No. 11977/59. Heading H3A. An oscillator is synchronised by sync pulses applied to open a diode gate circuit and sample the instantaneous (positive or negative) value of a balanced sawtooth wave derived from the oscillator, the integrated output of the gate circuit phase locking the oscillator so that the sync pulses and midpoint of the long flank of the sawtooth waves coincide. Further, the gate circuit has resistive or time constant means 40 connected across its diagonal, or in one or both of the sync inputs to the gate circuit to limit, during out of synchronism, the change in voltage across output capacitor 26 occurring at sawtooth flyback instants so that instead of the output across capacitor 26 being a sawtooth balanced about zero voltage with sharp flyback, the output flyback is partially suppressed and a .D.C. component arises of polaity indicating the relative sense of the frequency slip (difference frequency) between the sawtooth and sync inputs and speedily restoring frequency equality. The charge limiting resistors may be replaced by constant current devices, e.g. pentode valves, or non-linear resistors. The system may be applied to synchronizing television receiver scanning.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1197759A GB944161A (en) | 1959-04-09 | 1959-04-09 | Improvements in or relating to oscillator synchronizing circuit arrangements |
DER27703A DE1176184B (en) | 1959-04-09 | 1960-04-06 | Circuit arrangement for synchronizing an oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1197759A GB944161A (en) | 1959-04-09 | 1959-04-09 | Improvements in or relating to oscillator synchronizing circuit arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB944161A true GB944161A (en) | 1963-12-11 |
Family
ID=9996152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1197759A Expired GB944161A (en) | 1959-04-09 | 1959-04-09 | Improvements in or relating to oscillator synchronizing circuit arrangements |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1176184B (en) |
GB (1) | GB944161A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0242907A1 (en) * | 1986-04-15 | 1987-10-28 | Koninklijke Philips Electronics N.V. | Coincidence circuit in a line synchronizing circuit arrangement |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408591A (en) * | 1966-02-18 | 1968-10-29 | Varian Associates | Time scale changer for atomic stabilized frequency sources |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL182822B (en) * | 1952-11-15 | Roskam Willem Gerrit | PREPARATIVE ELECTROPHONE DEVICE. |
-
1959
- 1959-04-09 GB GB1197759A patent/GB944161A/en not_active Expired
-
1960
- 1960-04-06 DE DER27703A patent/DE1176184B/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0242907A1 (en) * | 1986-04-15 | 1987-10-28 | Koninklijke Philips Electronics N.V. | Coincidence circuit in a line synchronizing circuit arrangement |
Also Published As
Publication number | Publication date |
---|---|
DE1176184B (en) | 1964-08-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3259851A (en) | Digital system for stabilizing the operation of a variable frequency oscillator | |
GB637243A (en) | Frequency and phase control system | |
GB1299420A (en) | Impulse width discriminator | |
GB889781A (en) | Improvements in or relating to synchronising circuit arrangements | |
GB788114A (en) | Improvements relating to frequency and phase control systems | |
GB996624A (en) | Phase and frequency comparison circuit comprising two rectifying sections | |
GB944161A (en) | Improvements in or relating to oscillator synchronizing circuit arrangements | |
US2617040A (en) | Electrical oscillator circuit arrangement | |
GB1111355A (en) | Stabilised variable oscillator | |
US3311841A (en) | Frequency control system with phase conscious control interrupter | |
GB1049916A (en) | Method for synchronizing electrical circuits | |
GB740856A (en) | Improvements in or relating to circuits for synchronizing sawtooth oscillators | |
GB1271307A (en) | Phase discriminator for synchronizing a local oscillator | |
GB1004673A (en) | Improvements in or relating to oscillator frequency stabilizing | |
GB1361783A (en) | Frequency synchronisers | |
US3806827A (en) | Frequency locked oscillator system in which input and oscillator frequencies are compared on half-cycle basis | |
GB1369517A (en) | Television line time base arrangements | |
GB1047773A (en) | Improvement in systems for measuring a distance | |
GB1242457A (en) | A method and circuit for the control of oscillators | |
US2983873A (en) | Pulse time discriminator circuit which eliminates transients induced by gating pulses | |
US3370234A (en) | Apparatus for producing a replica of repetitive waveforms having undesired voltages superimposed thereon | |
GB1254973A (en) | Television synchronizing system | |
GB798773A (en) | Improvements in or relating to synchronising circuits for television receivers | |
GB874208A (en) | Improvements in or relating to circuit arrangements for comparing pulses | |
GB915293A (en) | Improvements in or relating to push-pull phase detectors |