GB710112A - Improvements in or relating to electrical attenuators - Google Patents
Improvements in or relating to electrical attenuatorsInfo
- Publication number
- GB710112A GB710112A GB1888551A GB1888551A GB710112A GB 710112 A GB710112 A GB 710112A GB 1888551 A GB1888551 A GB 1888551A GB 1888551 A GB1888551 A GB 1888551A GB 710112 A GB710112 A GB 710112A
- Authority
- GB
- United Kingdom
- Prior art keywords
- range
- tube
- over
- attenuator
- capacity
- 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
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
Landscapes
- Filters And Equalizers (AREA)
Abstract
710,112. Impedance networks. GENERAL ELECTRIC CO., Ltd. Aug. 11, 1952 [Aug. 10, 1951], No. 18885/51. Class 40 (8) A variable electric attenuator in which, over a range of frequencies, the attenuation is independent of frequency, comprises an input circuit which is mainly resistive over the range and a circuit connected to output which is mainly resistive over the range, there being variable mutual capacitative coupling between the two circuits. As shown the input circuit comprises resistor 4 of resistance R1, metal member 3 and the capacitance coupling Cl between member 3 and metal tube 1. Sliding inside tube 1 is a further metal tube 8 inside which lies a length of coaxial cable 9, the inner and outer conductors of which constitute the output terminals of the attenuator. The end 12 of the cable 9 has a cartridge type resistor 13 of resistance R2, connected between the inner and outer conductors of resistance equal to the characteristic impedance of cable 9. A further metal member 16 is connected to the inner conductor 14 and the capacity between the members 3 and 16 is varied by sliding tube 8 and the coaxial cable 9 connected to it, relative to the tube 1. The reactance of capacity C1 should be less than R1/7 and that of the capacity between member 16 and tubes 1 and 8 should be greater than 7R2 over the range of frequencies. Specific dimensions are given for an attenuator to be used in the range 50 to 120 megacycles per second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1888551A GB710112A (en) | 1951-08-10 | 1951-08-10 | Improvements in or relating to electrical attenuators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1888551A GB710112A (en) | 1951-08-10 | 1951-08-10 | Improvements in or relating to electrical attenuators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB710112A true GB710112A (en) | 1954-06-09 |
Family
ID=10120098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1888551A Expired GB710112A (en) | 1951-08-10 | 1951-08-10 | Improvements in or relating to electrical attenuators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB710112A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2933684A (en) * | 1956-12-05 | 1960-04-19 | Myron C Selby | Attenuator-thermoelectric highfrequency voltmeter |
-
1951
- 1951-08-10 GB GB1888551A patent/GB710112A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2933684A (en) * | 1956-12-05 | 1960-04-19 | Myron C Selby | Attenuator-thermoelectric highfrequency voltmeter |
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