GB505492A - Electric wave amplifying systems - Google Patents
Electric wave amplifying systemsInfo
- Publication number
- GB505492A GB505492A GB30378/37A GB3037837A GB505492A GB 505492 A GB505492 A GB 505492A GB 30378/37 A GB30378/37 A GB 30378/37A GB 3037837 A GB3037837 A GB 3037837A GB 505492 A GB505492 A GB 505492A
- Authority
- GB
- United Kingdom
- Prior art keywords
- feedback
- paths
- path
- feedback paths
- transformer
- 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
- 230000005540 biological transmission Effects 0.000 abstract 3
- 238000004804 winding Methods 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 230000010363 phase shift Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/06—Control of transmission; Equalising by the transmitted signal
- H04B3/08—Control of transmission; Equalising by the transmitted signal in negative-feedback path of line amplifier
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
505,492. Valve amplfying circuits. STANDARD TELEPHONES & CABLES, Ltd. Nov. 5, 1937, No. 30378. Convention date, Dec. 5, 1936. [Class 40 (v)] A wave translating system comprises amplifying and feedback paths, and a balancing impedance and a transformer associating the amplifying and feedback paths with the balancing impedance and the transmission path. The circuit includes two series connected windings of a hydrid coil one of the coils being connected between the amplifying path and the feedback path and the other between the feedback path and the balancing impedance. A third winding on the transformer is in the transmission path. The Figure shows an amplifier with hybrid transformers 45, 47 used in the input and output and two feedback paths 42, 43, the latter including a transformer so that either line L<1> or, line L, or both, may be unbalanced to ground. The feedback paths 42, 43 may be conjugate to one another and to the amplifier and to the input and output circuits. The feedbacks in the two paths may be adjusted one relatively to the other so that the singing tendency produced by one loop is prevented by feedback in the -other loop as described in. U.S.A. Specification 1,994,457. The input and output impedances may be balanced by networks 55, 60 as described in Specification 506,791. The couplings in the amplifier and in the feedback paths may have different cut-off frequencies so that stability may be obtained with increased feedback. A plurality of transformers may be included in the feedback loop one of which may contribute the major portion of the phase shift and gain change. The feedback paths may include a band elimination filter 50 and a transmission control network 51.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US114393A US2210001A (en) | 1936-12-05 | 1936-12-05 | Electric wave amplifying system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB505492A true GB505492A (en) | 1939-05-05 |
Family
ID=22354918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB30378/37A Expired GB505492A (en) | 1936-12-05 | 1937-11-05 | Electric wave amplifying systems |
Country Status (2)
Country | Link |
---|---|
US (1) | US2210001A (en) |
GB (1) | GB505492A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2508416A (en) * | 1946-06-26 | 1950-05-23 | Rca Corp | Stabilized high-frequency amplifier |
US2922846A (en) * | 1957-04-18 | 1960-01-26 | Internat Telephone & Telegraph | Audio amplifier system |
-
1936
- 1936-12-05 US US114393A patent/US2210001A/en not_active Expired - Lifetime
-
1937
- 1937-11-05 GB GB30378/37A patent/GB505492A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2210001A (en) | 1940-08-06 |
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