GB539444A - Improvements in electrical networks - Google Patents
Improvements in electrical networksInfo
- Publication number
- GB539444A GB539444A GB436140A GB436140A GB539444A GB 539444 A GB539444 A GB 539444A GB 436140 A GB436140 A GB 436140A GB 436140 A GB436140 A GB 436140A GB 539444 A GB539444 A GB 539444A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- shunt
- sections
- inductance
- rsh
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0066—Constructional details of transient suppressor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/2039—Galvanic coupling between Input/Output
-
- 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
- H03H7/06—Frequency selective two-port networks including resistors
- H03H7/07—Bridged T-filters
-
- 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
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1716—Comprising foot-point elements
- H03H7/1725—Element to ground being common to different shunt paths, i.e. Y-structure
-
- 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
- H03H7/075—Ladder networks, e.g. electric wave filters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Waveguide Connection Structure (AREA)
- Filters And Equalizers (AREA)
- Amplifiers (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
539,444. Impedance networks. STANDARD TELEPHONES & CABLES, Ltd., and JACOBSEN, B. B. March 8, 1940, No. 4361. [Class 40 (iii)] A band-elimination filter comprises two or more sections of the form shown in Fig. 2,.or its equivalent shown in Fig. 8, the resistance r being inherent in the inductance L and the resistance y being chosen to give infinite attenuation at a certain frequency. Since the value of the inductance L depends to some extent on the current therethrough, the first section is dimensioned to give maximum attenuation at the desired frequency for the maximum input current it is likely to receive, while the second and any succeeding sections are correspondingly adjusted for the lower input thereto. In addition the discrimination effect is improved by a series resistance Rs, Fig. 2, or a shunt resistance RSH, Fig. 8, at the junction of two sections in order to bring about a reflection loss at that point. To prevent the impedance of the filter of Fig. 2 becoming too high at low frequencies, a shunt resistance may be connected to the mid-point of Rs, or a pair of shunt resistances may be bridged across the terminals. Fig. 9 shows a modification employing one section of each of the types used in Figs. 2, 8, with both series and shunt resistances Rs, RSH, such that their product is equal to the square of the terminating resistance.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE476737D BE476737A (en) | 1940-03-08 | ||
FR956090D FR956090A (en) | 1940-03-08 | ||
GB436140A GB539444A (en) | 1940-03-08 | 1940-03-08 | Improvements in electrical networks |
GB918740A GB541380A (en) | 1940-03-08 | 1940-05-24 | Improvements in or relating to electric transmission networks |
ES0177213A ES177213A1 (en) | 1940-03-08 | 1947-03-13 | IMPROVEMENTS IN ELECTRICAL DEVICES |
FR57894D FR57894E (en) | 1940-03-08 | 1947-12-23 | Electrical networks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB436140A GB539444A (en) | 1940-03-08 | 1940-03-08 | Improvements in electrical networks |
Publications (1)
Publication Number | Publication Date |
---|---|
GB539444A true GB539444A (en) | 1941-09-10 |
Family
ID=9775714
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB436140A Expired GB539444A (en) | 1940-03-08 | 1940-03-08 | Improvements in electrical networks |
GB918740A Expired GB541380A (en) | 1940-03-08 | 1940-05-24 | Improvements in or relating to electric transmission networks |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB918740A Expired GB541380A (en) | 1940-03-08 | 1940-05-24 | Improvements in or relating to electric transmission networks |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE476737A (en) |
ES (1) | ES177213A1 (en) |
FR (2) | FR57894E (en) |
GB (2) | GB539444A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959752A (en) * | 1959-03-25 | 1960-11-08 | Hycon Eastern Inc | Selective low distortion crystal filter |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2558748A (en) * | 1945-12-14 | 1951-07-03 | Andrew V Haeff | Radio-frequency filter |
US2676309A (en) * | 1950-04-05 | 1954-04-20 | William J Armstrong | High-frequency power transmission line for cyclotrons and the like |
US2841771A (en) * | 1951-04-18 | 1958-07-01 | Frank S Dunleavey | Four-terminal filter embodying an ionized medium |
US2683862A (en) * | 1951-07-11 | 1954-07-13 | Raytheon Mfg Co | Tunable resonant structure |
BE542180A (en) * | 1953-01-21 | |||
NL202113A (en) * | 1954-03-05 | |||
US2926317A (en) * | 1954-03-11 | 1960-02-23 | Sanders Associates Inc | Transmission line |
-
0
- BE BE476737D patent/BE476737A/xx unknown
- FR FR956090D patent/FR956090A/fr not_active Expired
-
1940
- 1940-03-08 GB GB436140A patent/GB539444A/en not_active Expired
- 1940-05-24 GB GB918740A patent/GB541380A/en not_active Expired
-
1947
- 1947-03-13 ES ES0177213A patent/ES177213A1/en not_active Expired
- 1947-12-23 FR FR57894D patent/FR57894E/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2959752A (en) * | 1959-03-25 | 1960-11-08 | Hycon Eastern Inc | Selective low distortion crystal filter |
Also Published As
Publication number | Publication date |
---|---|
FR57894E (en) | 1953-09-18 |
GB541380A (en) | 1941-11-25 |
BE476737A (en) | |
ES177213A1 (en) | 1947-04-16 |
FR956090A (en) | 1950-01-24 |
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