GB542847A - Improvements in or relating to arrangements adapted to minimise the effects of the impedance of the earth wire or earth bus-bar in high-frequency electric circuits - Google Patents
Improvements in or relating to arrangements adapted to minimise the effects of the impedance of the earth wire or earth bus-bar in high-frequency electric circuitsInfo
- Publication number
- GB542847A GB542847A GB14650/40A GB1465040A GB542847A GB 542847 A GB542847 A GB 542847A GB 14650/40 A GB14650/40 A GB 14650/40A GB 1465040 A GB1465040 A GB 1465040A GB 542847 A GB542847 A GB 542847A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impedance
- bar
- bus
- earth
- currents
- 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
- H03H7/01—Frequency selective two-port networks
- H03H7/0123—Frequency selective two-port networks comprising distributed impedance elements together with lumped impedance elements
Abstract
542,847. Transmission circuits. SIEMENS BROS. & CO., Ltd., and MOLE, J. H. Sept. 27, 1940, Nos. 14650/40 and 6/41. [Class 40 (iv)] [Also in Group XL] When apparatus involving an earthed busbar, such as a valve amplifier or an iterative impedance-network, is employed with a circuit which is earthed at another point, currents may circulate through the bus-bar and the earth-connections with undesirable results. To prevent this, the input or output circuit is provided in each wire with a choke coil, the two coils being tightly coupled so that they offer no substantial impedance to the loop currents. The choke coils may be in the form of a coil of co-axial cable and either or both may be tuned as by a condenser 11 connected to the outer conductor. In the arrangement shown in Fig. 1, the apparatus concerned is a submerged repeater including a filter 7. The impedance of the bus-bar should be as small as possible and the elements of the circuit should have as small a mutual inductance as possible with the bus-bar and any other path for the unwanted currents. In an impedance network, each element may be screened and the connecting wires may be led through pipes branched from a main pipe which constitutes the busbar. The branch pipes may be omitted if the terminals of the elements are arranged near to the main pipe or if co-axial cable is used for making the connections.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14650/40A GB542847A (en) | 1940-09-27 | 1940-09-27 | Improvements in or relating to arrangements adapted to minimise the effects of the impedance of the earth wire or earth bus-bar in high-frequency electric circuits |
| US409262A US2419907A (en) | 1940-09-27 | 1941-09-02 | Means for reducing impedance effects in grounded communication circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14650/40A GB542847A (en) | 1940-09-27 | 1940-09-27 | Improvements in or relating to arrangements adapted to minimise the effects of the impedance of the earth wire or earth bus-bar in high-frequency electric circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB542847A true GB542847A (en) | 1942-01-29 |
Family
ID=10045067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14650/40A Expired GB542847A (en) | 1940-09-27 | 1940-09-27 | Improvements in or relating to arrangements adapted to minimise the effects of the impedance of the earth wire or earth bus-bar in high-frequency electric circuits |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2419907A (en) |
| GB (1) | GB542847A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE544938A (en) * | 1955-02-04 | |||
| US3051918A (en) * | 1955-11-18 | 1962-08-28 | Edgerton Germeshausen & Grier | Transmission-line transformer |
| US3092793A (en) * | 1959-09-28 | 1963-06-04 | Bendix Corp | Phase shift apparatus adjustable by movement of dielectric slug |
| NL297109A (en) * | 1961-11-01 | |||
| US3913038A (en) * | 1974-08-21 | 1975-10-14 | Rca Corp | Electromagnetic radiation filter for coaxially fed hot chassis television receiver |
| US4145674A (en) * | 1975-04-30 | 1979-03-20 | King William M | Electromagnetic interference suppression system for electrical equipment |
| US4682125A (en) * | 1986-02-10 | 1987-07-21 | The Regents Of The University Of California | RF coil coupling for MRI with tuned RF rejection circuit using coax shield choke |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2097491A (en) * | 1931-04-01 | 1937-11-02 | Western Electric Co | Transmission line for electrical signaling systems |
| DE592184C (en) * | 1932-05-31 | 1934-02-02 | Lorenz Akt Ges C | Power line for antennas |
| US1994905A (en) * | 1932-09-07 | 1935-03-19 | Bowles Edward Lindley | Shielded electric system |
| US1985042A (en) * | 1933-07-28 | 1934-12-18 | Bell Telephone Labor Inc | Wave transmission network |
| DE603627C (en) * | 1933-08-18 | 1934-10-04 | Lorenz Akt Ges C | Power line for antennas |
| GB485618A (en) * | 1936-11-18 | 1938-05-18 | Edward Cecil Cork | Improvements in or relating to electric wave filters |
| US2204721A (en) * | 1936-12-02 | 1940-06-18 | Emi Ltd | Impedance network for coupling electric cable circuits |
| US2158875A (en) * | 1937-05-28 | 1939-05-16 | Gen Electric | Antenna system |
| US2280950A (en) * | 1941-05-13 | 1942-04-28 | Westinghouse Electric & Mfg Co | Pilot wire system with means for neutralizing induced voltages |
-
1940
- 1940-09-27 GB GB14650/40A patent/GB542847A/en not_active Expired
-
1941
- 1941-09-02 US US409262A patent/US2419907A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2419907A (en) | 1947-04-29 |
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