GB484423A - Improvements in electric amplifiers employing thermionic or like valves - Google Patents
Improvements in electric amplifiers employing thermionic or like valvesInfo
- Publication number
- GB484423A GB484423A GB80837A GB80837A GB484423A GB 484423 A GB484423 A GB 484423A GB 80837 A GB80837 A GB 80837A GB 80837 A GB80837 A GB 80837A GB 484423 A GB484423 A GB 484423A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impedance
- load
- amplifier
- impedances
- frequency dependent
- 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
484,423. Valve amplifying circuits. GENERAL ELECTRIC CO., Ltd., and FARREN, L. I. Jan. 11, 1937, Nos. 808 and 34118. [Class 40 (v)] In a negative feedback amplifier variations with frequency of the input impedance Xo of the amplifier relatively to the impedance X connected to the input terminals is compensated by the provision of frequency dependent impedances in the feedback path. The invention may be applied to an amplifier in which frequency dependent impedances are provided in the feedback path as described in Specification 484,332 so that the output current or voltage on the load is stabilized and the output impedance is stabilized or matches the load or is less than the impedance of the output valve. The Figure shows an amplifier 5 feeding a load Z and having a feedback path Z1 .. Z7. The frequency dependent impedance according to the invention may be included in one of the potentiometers Z1, Z2 or Z4, Z5 or Z6, Z7. Alternatively or additionally the impedance Z3 in series with the load may be reactive or a reactance may be connected in series with the load. More than seven impedances may be included in the feed back path, and the impedances Z4, Z5 and Z1, Z2 or Z3 may be dispensed with. The Specification gives a mathematical analysis of the conditions to be satisfied for a large number of examples.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB80837A GB484423A (en) | 1937-01-11 | 1937-01-11 | Improvements in electric amplifiers employing thermionic or like valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB80837A GB484423A (en) | 1937-01-11 | 1937-01-11 | Improvements in electric amplifiers employing thermionic or like valves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB484423A true GB484423A (en) | 1938-05-05 |
Family
ID=9710855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB80837A Expired GB484423A (en) | 1937-01-11 | 1937-01-11 | Improvements in electric amplifiers employing thermionic or like valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB484423A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2843671A (en) * | 1954-05-19 | 1958-07-15 | David Bogen & Company Inc | Feed back amplifiers |
US3204229A (en) * | 1960-09-09 | 1965-08-31 | Fischer & Porter Co | Signal transmitter |
FR2484170A1 (en) * | 1980-06-09 | 1981-12-11 | Pass Matvei | Cascadable RF common grid power amplifier - uses compensating voltage feedback with input connection to tap on inductive divider between tetrode and screen grid |
-
1937
- 1937-01-11 GB GB80837A patent/GB484423A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2843671A (en) * | 1954-05-19 | 1958-07-15 | David Bogen & Company Inc | Feed back amplifiers |
US3204229A (en) * | 1960-09-09 | 1965-08-31 | Fischer & Porter Co | Signal transmitter |
FR2484170A1 (en) * | 1980-06-09 | 1981-12-11 | Pass Matvei | Cascadable RF common grid power amplifier - uses compensating voltage feedback with input connection to tap on inductive divider between tetrode and screen grid |
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