GB436734A - Improvements in and relating to electrical amplifiers, such as may be used for example in television - Google Patents
Improvements in and relating to electrical amplifiers, such as may be used for example in televisionInfo
- Publication number
- GB436734A GB436734A GB11602/34A GB1160234A GB436734A GB 436734 A GB436734 A GB 436734A GB 11602/34 A GB11602/34 A GB 11602/34A GB 1160234 A GB1160234 A GB 1160234A GB 436734 A GB436734 A GB 436734A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequencies
- valves
- resistance
- shunted
- cell
- 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
- IDLFZVILOHSSID-OVLDLUHVSA-N corticotropin Chemical compound C([C@@H](C(=O)N[C@@H](CO)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1NC=NC=1)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](C(C)C)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CC=1C=CC(O)=CC=1)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CC(N)=O)C(=O)NCC(=O)N[C@@H](C)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(=O)N[C@@H](C)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](C)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(O)=O)NC(=O)[C@@H](N)CO)C1=CC=C(O)C=C1 IDLFZVILOHSSID-OVLDLUHVSA-N 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
436,734. Valve amplifying - circuits. BLUMLEIN, A. D., 7, Courtfield Gardens, Ealing, and BROWNE, C. O., 29, Monks Drive, West Acton, both in London. April 17, 1934, No. 11602. [Class 40 (v)] An amplifier for handling a wide band of frequencies extending substantially to zero frequency, such as arise in a light-sensitive cell in a television system, the cell circuit is arranged to discriminate against high frequencies, and the amplifier circuit to discriminate against low frequencies, the several stages of the amplifier favouring different bands of the higher frequencies. In this way, battery noises and like low-frequency components are not unduly amplified. As shown, the resistance 3 connected in series with the cell 1 is of a high value, e.g. 5 megohms, so that the higher frequencies are shunted by the inherent capacities across the resistance and are not so effective on the grid of the valve 6 as are the lower frequencies. The valves 6, 11, 13, 14 are directly coupled to each other by potentiometers 7, 9, 12, the portions 7 being in the plate circuits of the valves. and the portions 12 in the grid circuits. The intervening portions 9 are shunted by condensers 10 of successively smaller values along the chain with the effect that successive stages favour successively higher bands of frequencies. Very low frequencies are not amplified in the valves 6, 11, 13, but only by the final stage or stages 14. The last intervalve coupling may include inductance coils 15, 16 which tend to intensify the discrimination in favour of the highest frequencies. Coils 8 may also be provided in the earlier stages in series with the condenser-shunted resistance 9. Parallel-resonant circuits tuned to a frequency higher than the frequency to be amplified may be connected across the anodecathode paths of the valves. The valves may have guard rings to prevent leakage between plate and grid ; and similar rings may be provided in the cell 1. In a modification, the high resistance 3 is shunted by a small capacity (À05 microfarad), and a low resistance (5000 ohms.) is connected in series with the combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11602/34A GB436734A (en) | 1934-04-17 | 1934-04-17 | Improvements in and relating to electrical amplifiers, such as may be used for example in television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11602/34A GB436734A (en) | 1934-04-17 | 1934-04-17 | Improvements in and relating to electrical amplifiers, such as may be used for example in television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB436734A true GB436734A (en) | 1935-10-17 |
Family
ID=9989260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11602/34A Expired GB436734A (en) | 1934-04-17 | 1934-04-17 | Improvements in and relating to electrical amplifiers, such as may be used for example in television |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB436734A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2420731A (en) * | 1942-11-18 | 1947-05-20 | Rca Corp | Facsimile apparatus |
| DE756014C (en) * | 1936-02-21 | 1951-12-20 | Emi Ltd | Filter arranged between two amplifier tubes |
-
1934
- 1934-04-17 GB GB11602/34A patent/GB436734A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE756014C (en) * | 1936-02-21 | 1951-12-20 | Emi Ltd | Filter arranged between two amplifier tubes |
| US2420731A (en) * | 1942-11-18 | 1947-05-20 | Rca Corp | Facsimile apparatus |
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