GB458879A - Improvements in or relating to electric circuits comprising thermionic valves with indirectly heated cathodes - Google Patents
Improvements in or relating to electric circuits comprising thermionic valves with indirectly heated cathodesInfo
- Publication number
- GB458879A GB458879A GB3022335A GB3022335A GB458879A GB 458879 A GB458879 A GB 458879A GB 3022335 A GB3022335 A GB 3022335A GB 3022335 A GB3022335 A GB 3022335A GB 458879 A GB458879 A GB 458879A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- indirectly heated
- relating
- electric circuits
- cathode
- 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
- H04N5/08—Separation of synchronising signals from picture signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Microwave Amplifiers (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
458,879. Valve amplifying circuits; television receivers. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and EDWARDS, G. W., and ESPLEY, D. C., c/o General Electric Co., Ltd., Wembley, Middlesex. Nov. 1, 1935, No. 30223. [Classes 40 (iii) and 40 (v)] An indirectly heated diode valve 7, used for separating synchronizing from picture signals and connected between the anode 5 of an amplifier 3 and a point on an H.T. supply potentiometer 18, introduces a stray capacity across the signal load resistance 12 due to the capacity of the heater winding 16 to earth. In order to minimize this effect a resistance 17 is connected between the cathode 6 of diode 7 and the said winding, the resistance being large compared with the resistance 12 but small compared with the insulation resistance between the heater 15 and the cathode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3022335A GB458879A (en) | 1935-11-01 | 1935-11-01 | Improvements in or relating to electric circuits comprising thermionic valves with indirectly heated cathodes |
| DER97741D DE706838C (en) | 1935-11-01 | 1936-11-01 | In the exit of an electron tube, e.g. B. an amplifier, switched amplitude filter arrangement with indirectly heated electron tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3022335A GB458879A (en) | 1935-11-01 | 1935-11-01 | Improvements in or relating to electric circuits comprising thermionic valves with indirectly heated cathodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB458879A true GB458879A (en) | 1936-12-29 |
Family
ID=10304237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3022335A Expired GB458879A (en) | 1935-11-01 | 1935-11-01 | Improvements in or relating to electric circuits comprising thermionic valves with indirectly heated cathodes |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE706838C (en) |
| GB (1) | GB458879A (en) |
-
1935
- 1935-11-01 GB GB3022335A patent/GB458879A/en not_active Expired
-
1936
- 1936-11-01 DE DER97741D patent/DE706838C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE706838C (en) | 1941-06-06 |
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