GB726700A - Improvements in or relating to negative impedance networks for transmission lines - Google Patents
Improvements in or relating to negative impedance networks for transmission linesInfo
- Publication number
- GB726700A GB726700A GB7058/53A GB705853A GB726700A GB 726700 A GB726700 A GB 726700A GB 7058/53 A GB7058/53 A GB 7058/53A GB 705853 A GB705853 A GB 705853A GB 726700 A GB726700 A GB 726700A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impedance
- transmission line
- negative
- impedances
- transistor
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/16—Control of transmission; Equalising characterised by the negative-impedance network used
- H04B3/18—Control of transmission; Equalising characterised by the negative-impedance network used wherein the network comprises semiconductor devices
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Amplifiers (AREA)
- Networks Using Active Elements (AREA)
Abstract
726,700. Negative resistance loading. MOULON, J. M. March 13, 1953 [June 6, 1952], No. 7058/53. Class 40 (4). [Also in Group XL (c)] A negative impedance device (i.e. a twoterminal network presenting an impedance having a negative real component) used for the loading of transmission line comprises a transistor amplifier having at least one impedance connected between one network terminal and the base electrode, the other network terminal being connected either directly or through a further impedance to a second electrode of the transistor. Fig. 8 shows the general circuit diagram, the terminals 6 and 7 being connected in series in the transmission line to be loaded and one at least of the impedances 3, 4, 5 having a reactive component of such a value that the reactive component of the loaded transmission line is eliminated. Practical embodiments of this circuit are shown in Figs. 11 and 12, the condensers 8 and 9 having large values and serving to block direct currents which are supplied to the transistor through the transmission line and resistors 10, 11 having large values so as not to materially affect the values of the impedances Z1, Z2, as determined by the components 3 and 5. In the arrangement of Fig. 12, the capacitative impedance 3 and the blocking condenser 9 are combined as one single 1000 pF condenser. In an alternative arrangement, Fig. 10 (not shown), negative impedances are inserted at each loading point into each conductor of a two-wire line. Fig. 13 (not shown) illustrates an arrangement employing a local power supply and coupled to the line through a transformer. Specifications 432,759 and 563,417 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1057731T | 1952-06-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB726700A true GB726700A (en) | 1955-03-23 |
Family
ID=9598152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7058/53A Expired GB726700A (en) | 1952-06-06 | 1953-03-13 | Improvements in or relating to negative impedance networks for transmission lines |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE518899A (en) |
CH (1) | CH325681A (en) |
FR (1) | FR1057731A (en) |
GB (1) | GB726700A (en) |
NL (1) | NL172515B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000025857A1 (en) * | 1998-11-02 | 2000-05-11 | Stojan Velkoski | Bio neutralizer-transformer |
-
0
- BE BE518899D patent/BE518899A/xx unknown
- NL NLAANVRAGE7103947,A patent/NL172515B/en unknown
-
1952
- 1952-06-06 FR FR1057731D patent/FR1057731A/en not_active Expired
-
1953
- 1953-01-16 CH CH325681D patent/CH325681A/en unknown
- 1953-03-13 GB GB7058/53A patent/GB726700A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1057731A (en) | 1954-03-10 |
BE518899A (en) | |
NL172515B (en) | |
CH325681A (en) | 1957-11-15 |
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