GB747045A - Improvements in or relating to circuit arrangements for synchronizing a multi-vibrator - Google Patents
Improvements in or relating to circuit arrangements for synchronizing a multi-vibratorInfo
- Publication number
- GB747045A GB747045A GB4642/54A GB464254A GB747045A GB 747045 A GB747045 A GB 747045A GB 4642/54 A GB4642/54 A GB 4642/54A GB 464254 A GB464254 A GB 464254A GB 747045 A GB747045 A GB 747045A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- multivibrator
- grid
- control
- discriminator
- 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)
- Details Of Television Scanning (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
747,045. Automatic frequency and phase control. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 17, 1954 [Feb. 20, 1953], No. 4642/54. Class 38 (4). [Also in Group XL (e)] Synchronization of a free-running multivibrator is effected by a control voltage from a push-pull discriminator D applied to the control grid of one of the valves through a resistor 13 and the mean grid current ig through this resistor 13 is arranged to be balanced by an equal positive current flowing to the control voltage input point 16 from a point of fixed positive, potential, e.g. H.T., through a resistor 17 of selected value. The pulsatory voltage from the multivibrator generates at 15 a sawtooth voltage whose phase is controlled, relative to incoming sync pulses 2 derived, e.g. in a television receiver, by mixing the sawtooth waves and pulses in the discriminator D and applying the D.C. output of the latter, as above, to the grid of one valve of the multivibrator.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE319802X | 1953-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB747045A true GB747045A (en) | 1956-03-28 |
Family
ID=3867676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4642/54A Expired GB747045A (en) | 1953-02-20 | 1954-02-17 | Improvements in or relating to circuit arrangements for synchronizing a multi-vibrator |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE517829A (en) |
| CH (1) | CH319802A (en) |
| DE (1) | DE947816C (en) |
| FR (1) | FR1093381A (en) |
| GB (1) | GB747045A (en) |
| NL (2) | NL100365C (en) |
-
0
- BE BE517829D patent/BE517829A/xx unknown
- FR FR1093381D patent/FR1093381A/fr not_active Expired
- NL NLAANVRAGE8100867,B patent/NL185173B/en unknown
- NL NL100365D patent/NL100365C/xx active
-
1954
- 1954-02-17 GB GB4642/54A patent/GB747045A/en not_active Expired
- 1954-02-18 CH CH319802D patent/CH319802A/en unknown
- 1954-02-18 DE DEN8487A patent/DE947816C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH319802A (en) | 1957-02-28 |
| DE947816C (en) | 1956-08-23 |
| NL100365C (en) | |
| FR1093381A (en) | 1955-05-03 |
| BE517829A (en) | |
| NL185173B (en) |
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