GB620585A - Improvements in and relating to selection arrangements for electrical pulse systems - Google Patents
Improvements in and relating to selection arrangements for electrical pulse systemsInfo
- Publication number
- GB620585A GB620585A GB7981/46A GB798146A GB620585A GB 620585 A GB620585 A GB 620585A GB 7981/46 A GB7981/46 A GB 7981/46A GB 798146 A GB798146 A GB 798146A GB 620585 A GB620585 A GB 620585A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- synchronizing
- resistance
- grid
- circuit
- 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
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
- H04N5/213—Circuitry for suppressing or minimising impulsive noise
Abstract
620,585. Radio-receiving circuits; pulse amplifying circuits. PHILCO PRODUCTS, Inc. March 14, 1946, No. 7981. Convention date, March 14, 1945. [Classes 40 (v) and 40 (vi)] [Also in Group XL (b)] In a television receiver the separated synchronizing pulses are applied to a circuit resonant at the pulse frequency, by means of which the synchronizing pulse separator valve is gated in synchronism in order to prevent interference by transient electrical disturbances. Negatively modulated signals are applied to the grid 13 of the separator valve 10, which is self-biassed by means of a resistance 18 and condenser 17. Synchronizing pulses are taken off from the anode circuit, comprising the resistance 19 and an L.C. circuit 20, 22 resonant at the synchronizing frequency. The inductance 20 is centre-tapped, the sinusoidal wave appearing at the terminal 24 being applied over a condenser 25 and resistance 26 to an inner grid 16 of the valve 10 so as to render it non-conductive for the duration of the interval between successive synchronizing impulses. In an alternative arrangement (Fig. 3, not shown), the gating wave is applied instead to the grid of a separate valve connected in series with the cathode lead of the valve 10.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US620585XA | 1945-03-14 | 1945-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB620585A true GB620585A (en) | 1949-03-28 |
Family
ID=22039945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7981/46A Expired GB620585A (en) | 1945-03-14 | 1946-03-14 | Improvements in and relating to selection arrangements for electrical pulse systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB620585A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2708240A (en) * | 1952-04-26 | 1955-05-10 | Du Mont Allen B Lab Inc | Sweep circuit |
| US2735933A (en) * | 1956-02-21 | Pulse repeater | ||
| US2803701A (en) * | 1952-04-26 | 1957-08-20 | Philco Corp | Amplitude selection circuit with noise cut-off |
-
1946
- 1946-03-14 GB GB7981/46A patent/GB620585A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2735933A (en) * | 1956-02-21 | Pulse repeater | ||
| US2708240A (en) * | 1952-04-26 | 1955-05-10 | Du Mont Allen B Lab Inc | Sweep circuit |
| US2803701A (en) * | 1952-04-26 | 1957-08-20 | Philco Corp | Amplitude selection circuit with noise cut-off |
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