GB625722A - Improvements in or relating to coupling networks - Google Patents
Improvements in or relating to coupling networksInfo
- Publication number
- GB625722A GB625722A GB20990/47A GB2099047A GB625722A GB 625722 A GB625722 A GB 625722A GB 20990/47 A GB20990/47 A GB 20990/47A GB 2099047 A GB2099047 A GB 2099047A GB 625722 A GB625722 A GB 625722A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impedance
- equalizer
- network
- line
- networks
- 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
- 230000008878 coupling Effects 0.000 title 1
- 238000010168 coupling process Methods 0.000 title 1
- 238000005859 coupling reaction Methods 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/40—Artificial lines; Networks simulating a line of certain length
-
- 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
-
- 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
- H03H7/38—Impedance-matching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/14—Control of transmission; Equalising characterised by the equalising network used
- H04B3/143—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
625,722. Impedance networks. WESTERN ELECTRIC CO., Inc. Aug. 1, 1947, No. 20990. Convention date, March 18, 1942. [Class 40 (viii)] A network for connecting a purely reactive equalizer having an impedance function Z to a line of characteristic resistance Ro has open circuit driving point impedances at its line and load terminals of Ro+ 2Ro<SP>2>/Z and 2Ro + Ro<SP>2>/Z respectively and an open circuit transfer impedance of #2(R<o>+Ro<SP>2>/Z). Such a network has an impedance when looking into it from either direction when the far end is closed with the appropriate line resistance Ro or equalizer impedance Z, and introduces the minimum possible attenuation (3 decibels) consistent with a flat input impedance characteristic for the combined network and equalizer. Fig. 1 shows a line 11 coupled to an equalizer 12 by one form of network according to the invention Ro<SP>2>/Z representing a network inverse with respect to that of the equalizer. Further networks are given of which Figs. 5, 7, and 9, are typical. Specification 542,175 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US435171A US2337965A (en) | 1942-03-18 | 1942-03-18 | Coupling network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB625722A true GB625722A (en) | 1949-07-01 |
Family
ID=23727299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20990/47A Expired GB625722A (en) | 1942-03-18 | 1947-08-01 | Improvements in or relating to coupling networks |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2337965A (en) |
| BE (1) | BE473976A (en) |
| FR (1) | FR948179A (en) |
| GB (1) | GB625722A (en) |
| NL (1) | NL77132C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2474238A (en) * | 1945-06-27 | 1949-06-28 | Myron Y Eck | Single null loop antenna |
| US2669698A (en) * | 1951-04-26 | 1954-02-16 | Collins Radio Co | Radio frequency matching transformer |
| US3155927A (en) * | 1960-09-12 | 1964-11-03 | Gen Electric | Bridged-t termination network |
| US6140849A (en) * | 1998-08-07 | 2000-10-31 | Trask; Christopher | Active double-balanced mixer with embedded linearization amplifiers |
| US6393267B1 (en) | 1999-07-07 | 2002-05-21 | Christopher Trask | Lossless feedback double-balance active mixers |
| US6400936B1 (en) | 1999-11-15 | 2002-06-04 | Christopher Trask | Low-noise lossless feedback double-balanced active mixers |
| US6242964B1 (en) | 1999-11-15 | 2001-06-05 | Christopher Trask | Low-distortion lossless feedback double-balanced active mixers using linearity augmentation |
| DE10248471A1 (en) * | 2002-10-17 | 2004-05-06 | Infineon Technologies Ag | Transformer circuit for communication system such as xDSL has two transformers connected together to create circuit with band-pass characteristic |
-
0
- BE BE473976D patent/BE473976A/xx unknown
-
1942
- 1942-03-18 US US435171A patent/US2337965A/en not_active Expired - Lifetime
-
1947
- 1947-06-18 FR FR948179D patent/FR948179A/en not_active Expired
- 1947-08-01 GB GB20990/47A patent/GB625722A/en not_active Expired
- 1947-08-15 NL NL134148A patent/NL77132C/xx active
Also Published As
| Publication number | Publication date |
|---|---|
| NL77132C (en) | 1955-02-15 |
| FR948179A (en) | 1949-07-25 |
| US2337965A (en) | 1943-12-28 |
| BE473976A (en) |
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