GB554329A - Impedance hatching networks for use in electrical transmission systems - Google Patents
Impedance hatching networks for use in electrical transmission systemsInfo
- Publication number
- GB554329A GB554329A GB9967/42A GB996742A GB554329A GB 554329 A GB554329 A GB 554329A GB 9967/42 A GB9967/42 A GB 9967/42A GB 996742 A GB996742 A GB 996742A GB 554329 A GB554329 A GB 554329A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impedance
- frequencies
- network
- matching
- series
- 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
- H03H7/38—Impedance-matching networks
Landscapes
- Filters And Equalizers (AREA)
- Amplifiers (AREA)
Abstract
554,329. Impedance networks. STANDARD TELEPHONES & CABLES, Ltd. July 17, 1942, No. 9967. Convention date, July 25, 1941. [Class 40 (iii)] A matching network for coupling two unequal impedances R 1 , R 2 comprises a series arm consisting of two closely-coupled inductances L 1 , L 2 in series-opposing relationship and a shunt arm consisting of a condenser C and resistance R in parallel. The impedance R 1 may be a transmission line, which the network may be designed to match over a wide band of frequencies, while the impedance R 2 may be an amplifier. Since the coupling is mainly resistive at low frequencies, and mainly inductive at high frequencies, the conditions for matching at those frequencies are R=R 1 R 2 / (R 2 -R 1 ) and L 1 /L 2 =R 1 /R 2 , while the condition for matching at the intermediate frequencies is In addition L 1 may be chosen so that the gain characteristic serves to some extent to neutralize attenuation distortion in the transmission line. The network may be constructed in balanced form as shown in Fig. 3 for use with amplifiers working in push-pull. Condensers C 1 , C 2 prevent the flow of direct current through the network, and the plate current of the amplifiers may be derived from the mid-point of resistances R 3 , R,. A shunt condenser C 3 forms a low-pass filter section with the leakage inductance of L 1 , L 2 , while series inductances L 3 , L, provide another similar section in conjunction with capacity component of the impedance R 2 .
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US403959A US2301023A (en) | 1941-07-25 | 1941-07-25 | Coupling network |
Publications (1)
Publication Number | Publication Date |
---|---|
GB554329A true GB554329A (en) | 1943-06-29 |
Family
ID=23597567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9967/42A Expired GB554329A (en) | 1941-07-25 | 1942-07-17 | Impedance hatching networks for use in electrical transmission systems |
Country Status (2)
Country | Link |
---|---|
US (1) | US2301023A (en) |
GB (1) | GB554329A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2733414A (en) * | 1956-01-31 | Frequency suppression | ||
US2669698A (en) * | 1951-04-26 | 1954-02-16 | Collins Radio Co | Radio frequency matching transformer |
US3106688A (en) * | 1961-02-20 | 1963-10-08 | Minnesota Mining & Mfg | Transformer coupling system effective over a wide frequency range |
US3212029A (en) * | 1961-04-27 | 1965-10-12 | Bell Telephone Labor Inc | Impedance stabilization of nonloaded telephone circuits |
JPH05333082A (en) * | 1992-05-30 | 1993-12-17 | Yokogawa Hewlett Packard Ltd | Balance signal supply circuit |
-
1941
- 1941-07-25 US US403959A patent/US2301023A/en not_active Expired - Lifetime
-
1942
- 1942-07-17 GB GB9967/42A patent/GB554329A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2301023A (en) | 1942-11-03 |
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