GB562655A - Improvements in or relating to negative feedback amplifiers - Google Patents
Improvements in or relating to negative feedback amplifiersInfo
- Publication number
- GB562655A GB562655A GB235/43A GB23543A GB562655A GB 562655 A GB562655 A GB 562655A GB 235/43 A GB235/43 A GB 235/43A GB 23543 A GB23543 A GB 23543A GB 562655 A GB562655 A GB 562655A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- stage
- resistances
- avoid
- grid
- 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
562,655. Valve amplifying circuits. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and CANNON, J. R. Jan. 6, 1943, No. 235. [Class 40 (v)] In a multi-stage push-pull amplifier using negative feed-back, the interstage coupling chokes and the output transformer are provided with gapped cores to avoid harmonic distortion and a common grid bias resistance is used in the cathode circuits of one stage to avoid spurious oscillation. The valves used are of the beam power tetrode type and are rendered satisfactorily interchangeable by the provision of an adjustment of the grid bias potential of one value of a pair in which separate resistances are used in the cathode leads. The Figures show a multichannel carrier telephone amplifier with feed-back from a tertiary winding on the output transformer to a centre tapped resistance YE in the input and grid stopper resistances YB, YC, YK, YL. Resistance YA is provided to avoid spurious oscillation at low settings of the gain control potentiometer PA while resistance YQ serves for matching and condenser QH improves the stability and flattens the response curve. A common bias resistance YF is used for the first stage and separate resistances with an adjustable portion YO on the output stage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB235/43A GB562655A (en) | 1943-01-06 | 1943-01-06 | Improvements in or relating to negative feedback amplifiers |
| US510545A US2380923A (en) | 1943-01-06 | 1943-11-16 | Negative feedback amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB235/43A GB562655A (en) | 1943-01-06 | 1943-01-06 | Improvements in or relating to negative feedback amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB562655A true GB562655A (en) | 1944-07-11 |
Family
ID=9700796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB235/43A Expired GB562655A (en) | 1943-01-06 | 1943-01-06 | Improvements in or relating to negative feedback amplifiers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2380923A (en) |
| GB (1) | GB562655A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2595444A (en) * | 1946-06-26 | 1952-05-06 | Harry W Becker | Amplifier |
| US2710312A (en) * | 1952-05-20 | 1955-06-07 | Acro Products Company | Ultra linear amplifiers |
-
1943
- 1943-01-06 GB GB235/43A patent/GB562655A/en not_active Expired
- 1943-11-16 US US510545A patent/US2380923A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2380923A (en) | 1945-08-07 |
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