GB516697A - Improvements in or relating to wave amplifying systems - Google Patents
Improvements in or relating to wave amplifying systemsInfo
- Publication number
- GB516697A GB516697A GB19901/38A GB1990138A GB516697A GB 516697 A GB516697 A GB 516697A GB 19901/38 A GB19901/38 A GB 19901/38A GB 1990138 A GB1990138 A GB 1990138A GB 516697 A GB516697 A GB 516697A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- arms
- impedance
- output
- relating
- 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
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
516,697. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd., and ROCHE, A. H. July 5, 1938, No. 19901. [Class 40 (v)] In an amplifier in which the feed-back is small and is varied to control the gain the output impedance is maintained substantially constant by altering the ratio between the current and the voltage feed-back. Two of the arms of the output bridge may consist of variable resistances conjointly operated, Fig. 1 (not shown). An impedance Rf may be connected across a diagonal of the output bridge and varied simultaneously with one of the arms Ra of the bridge. Any or all of the bridge arms may be a coupled impedance to give desired gain-frequency or impedancefrequency characteristics.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB227708X | 1938-07-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB516697A true GB516697A (en) | 1940-01-09 |
Family
ID=10184796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19901/38A Expired GB516697A (en) | 1938-07-05 | 1938-07-05 | Improvements in or relating to wave amplifying systems |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE434920A (en) |
CH (1) | CH227708A (en) |
DE (1) | DE896057C (en) |
FR (1) | FR854917A (en) |
GB (1) | GB516697A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE820451C (en) * | 1950-02-09 | 1951-11-12 | Telefunken Gmbh | Low frequency amplifier with negative voltage feedback |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE857401C (en) * | 1942-05-28 | 1952-11-27 | Siemens Ag | Multi-stage amplifier with gain control by changing the negative feedback |
DE893205C (en) * | 1949-11-11 | 1953-10-15 | Atlas Werke Ag | Circuit for amplifying and measuring the difference between variable, in particular biological, voltages |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB317005A (en) * | 1928-08-08 | 1930-10-22 | Standard Telephones Cables Ltd | Electric signal wave amplifying and translation systems |
GB435646A (en) * | 1933-09-26 | 1935-09-25 | Standard Telephones Cables Ltd | Vacuum tube amplifiers |
-
0
- BE BE434920D patent/BE434920A/xx unknown
-
1938
- 1938-07-05 GB GB19901/38A patent/GB516697A/en not_active Expired
-
1939
- 1939-05-17 FR FR854917D patent/FR854917A/en not_active Expired
- 1939-05-31 CH CH227708D patent/CH227708A/en unknown
- 1939-07-02 DE DEI3208D patent/DE896057C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE820451C (en) * | 1950-02-09 | 1951-11-12 | Telefunken Gmbh | Low frequency amplifier with negative voltage feedback |
Also Published As
Publication number | Publication date |
---|---|
CH227708A (en) | 1943-06-30 |
BE434920A (en) | |
DE896057C (en) | 1953-11-09 |
FR854917A (en) | 1940-04-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB533626A (en) | Electron discharge device amplifying circuits | |
GB581683A (en) | Improvements in or relating to amplifiers of electromagnetic energy | |
GB516697A (en) | Improvements in or relating to wave amplifying systems | |
GB515158A (en) | Improvements in and relating to thermionic valve amplifiers | |
GB559078A (en) | Improvements in or relating to thermionic valve amplifying circuits | |
GB653548A (en) | Improvements in and relating to feedback arrangements in symmetrical cathode follower circuits | |
GB611391A (en) | Thermionic valve amplifier circuit with multiple feedback | |
GB605811A (en) | Improvements in or relating to circuit arrangements for amplifying high-frequency electrical oscillations | |
GB662677A (en) | Phase inverter system | |
GB646581A (en) | Improvements in or relating to direct-current voltage amplifiers | |
GB542000A (en) | Improvements in and relating to electric wave transmission devices | |
GB475400A (en) | Thermionic amplifiers | |
GB617630A (en) | Improvements in or relating to thermionic valve wave translating circuits | |
GB520549A (en) | Improvements in or relating to thermionic amplifiers | |
GB672256A (en) | Improved electronic valve amplifiers | |
GB484102A (en) | Improvements in or relating to wave amplifying systems | |
GB490656A (en) | Improvements in broad band amplifiers | |
GB516628A (en) | Improvements in or relating to wave amplifying systems | |
GB708299A (en) | High-stability d.c. amplifier circuit arrangement | |
GB683319A (en) | Improvements in or relating to thermionic valve amplifiers | |
GB951720A (en) | High input impedance transistor amplifier | |
GB472256A (en) | Improvements in and relating to thermionic amplifiers | |
GB479388A (en) | Improvements relating to circuit arrangements employing thermionic amplifiers for controlling the volume range of signals | |
GB697064A (en) | Balanced low-frequency amplifiers | |
GB506765A (en) | Improvements in or relating to amplifiers for electrical signalling systems |