GB457532A - Thermionic valve circuits for differentiating between signals of different amplitude - Google Patents
Thermionic valve circuits for differentiating between signals of different amplitudeInfo
- Publication number
- GB457532A GB457532A GB1660335A GB1660335A GB457532A GB 457532 A GB457532 A GB 457532A GB 1660335 A GB1660335 A GB 1660335A GB 1660335 A GB1660335 A GB 1660335A GB 457532 A GB457532 A GB 457532A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- grid
- valve
- resistance
- signals
- 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
Abstract
457,532. Valve circuits. MURPHY RADIO, Ltd., 62, Brook Street, Hanover Square, London, and DAVIES, K. S., and FREUNDLICH, H. F. W. J., c/o Murphy Radio, Ltd., Broadwater Road, Welwyn Garden Citv. June 7, 1935, No. 16603. [Classes 40 (iii) and 40 (v)] Signals of different amplitude are differentiated by a screen-grid valve 1 operating on the negative-resistance part of its anode volts-anode current characteristic. Television and synchronizing signals are applied to the controlling-grid, and grid bias, anode, and screen-grid voltage are applied from a potentiometer 3.. 6 such that the valve operates on the negative-resistance part of the characteristic for values of applied grid voltage between the maximum picture signal and the minimum synchronizing-signal. A resistance 2 in the anode circuit is approximately equal, numerically, to the apparent negative resistance of the valve, and the anode supplies a scanning circuit through a lead 14. The valve is shunted by a diode 7 or other unilateral conductor in series with a biassing potential (across the resistance 4), which is equal to the potential of the anode at the lower bend of its grid volts-anode current characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1660335A GB457532A (en) | 1935-06-07 | 1935-06-07 | Thermionic valve circuits for differentiating between signals of different amplitude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1660335A GB457532A (en) | 1935-06-07 | 1935-06-07 | Thermionic valve circuits for differentiating between signals of different amplitude |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB457532A true GB457532A (en) | 1936-11-30 |
Family
ID=10080298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1660335A Expired GB457532A (en) | 1935-06-07 | 1935-06-07 | Thermionic valve circuits for differentiating between signals of different amplitude |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB457532A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2566763A (en) * | 1946-09-28 | 1951-09-04 | Motorola Inc | Synchronizing signal separator and keyed automatic gain control |
-
1935
- 1935-06-07 GB GB1660335A patent/GB457532A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2566763A (en) * | 1946-09-28 | 1951-09-04 | Motorola Inc | Synchronizing signal separator and keyed automatic gain control |
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