GB495943A - Improvements in circuits for reducing distortion with degenerative reaction - Google Patents
Improvements in circuits for reducing distortion with degenerative reactionInfo
- Publication number
- GB495943A GB495943A GB11551/38A GB1155138A GB495943A GB 495943 A GB495943 A GB 495943A GB 11551/38 A GB11551/38 A GB 11551/38A GB 1155138 A GB1155138 A GB 1155138A GB 495943 A GB495943 A GB 495943A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- feed
- output
- circuit
- valve
- 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
495,943. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd. April 14, 1938, No. 11551. Convention date, May 4, 1937. [Class 40 (v)] To prevent reduction of the sensitivity of an amplifier employing negative feed-back, the feed-back of output signal components is reduced with respect to the feed-back of distortion components by injecting incoming signal voltages into the feed-back circuit. A portion, E2, of the output voltage of the amplifier V2, V3, obtained from a winding B1 is fed via a potentiometer P2, together with a portion of the input voltage E1 derived from a potentiometer P1, to the grid circuit of an auxiliary valve V1. These voltages are in opposite phase and equal so that the output from transformer T2 consists of the distortion components produced in amplifiers V2, V3. The secondary of transformer T2 is connected in the cathode circuit of the first amplifier valve V2 in such a way that the signals injected are of inverse phase with respect to the distortion signals. In a modification, Fig. 2 (not shown), the auxiliary valve has two control grids to which a portion of the input signal and the feed-back from the amplifier output are separately applied. The output circuit of this auxiliary valve is also shown coupled to the input of the second stage of the amplifier. Reference has been directed by the Comptroller to Specification 467,833.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE495943X | 1937-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB495943A true GB495943A (en) | 1938-11-22 |
Family
ID=3870705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11551/38A Expired GB495943A (en) | 1937-05-04 | 1938-04-14 | Improvements in circuits for reducing distortion with degenerative reaction |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE759775C (en) |
| FR (1) | FR837477A (en) |
| GB (1) | GB495943A (en) |
| NL (1) | NL49781C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1009233B (en) * | 1953-06-24 | 1957-05-29 | Grundig Max | Circuit arrangement for the automatic control of the magnetic deflection in cathode ray tubes |
| DE1154833B (en) * | 1959-01-12 | 1963-09-26 | Telefunken Patent | Multi-stage transistor amplifier |
-
0
- NL NL49781D patent/NL49781C/xx active
-
1938
- 1938-04-14 GB GB11551/38A patent/GB495943A/en not_active Expired
- 1938-05-03 FR FR837477D patent/FR837477A/en not_active Expired
- 1938-05-05 DE DEI61257D patent/DE759775C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE759775C (en) | 1953-09-07 |
| NL49781C (en) | |
| FR837477A (en) | 1939-02-10 |
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