GB465108A - Improvements in or relating to television apparatus - Google Patents
Improvements in or relating to television apparatusInfo
- Publication number
- GB465108A GB465108A GB2717635A GB2717635A GB465108A GB 465108 A GB465108 A GB 465108A GB 2717635 A GB2717635 A GB 2717635A GB 2717635 A GB2717635 A GB 2717635A GB 465108 A GB465108 A GB 465108A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- unit
- resistance
- correcting unit
- grid
- 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
- H04N5/20—Circuitry for controlling amplitude response
- H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
- H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
465,108. Valve circuits. FERRANTI, Ltd., and ATKINSON, S. Oct. 2, 1935, No. 27176. [Classes 40 (iii) and 40 (v)] Attenuation of the higher audio- or videofrequencies and variation of phase angle is reduced by a correcting unit comprising an inductively wound resistance. In a series modulator, the photo-cell currents are applied to the grid of valve 2 whose output is coupled to a carrier frequency source 8 and applied to the grid of amplifying valve 4. The correcting unit is represented at 6, 7 and is applied across the choke 5, and anode-cathode space of the valve 4. If C is the stray capacity of the correcting unit, R its resistance, and L its inductance, L/CR<2>=0À333. As applied to a video-frequency amplifier, the unit 6, 7, Fig. 5 is placed in the output load circuit of the valve 15. L/CR<2>=5À76 in this case If the unit is used in the coupling between two valves of a video-frequency amplifier, L/CR<2>=0À414. The unit may be used to replace the resistance of a potentiometer volume control, Figs. 6, 7, 8, 9 (not shown), when L/CR<2>=0.1035. Specification 386,296 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2717635A GB465108A (en) | 1935-10-02 | 1935-10-02 | Improvements in or relating to television apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2717635A GB465108A (en) | 1935-10-02 | 1935-10-02 | Improvements in or relating to television apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB465108A true GB465108A (en) | 1937-05-03 |
Family
ID=10255431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2717635A Expired GB465108A (en) | 1935-10-02 | 1935-10-02 | Improvements in or relating to television apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB465108A (en) |
-
1935
- 1935-10-02 GB GB2717635A patent/GB465108A/en not_active Expired
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