GB622491A - Improvements in electronic amplifiers - Google Patents
Improvements in electronic amplifiersInfo
- Publication number
- GB622491A GB622491A GB2879946A GB2879946A GB622491A GB 622491 A GB622491 A GB 622491A GB 2879946 A GB2879946 A GB 2879946A GB 2879946 A GB2879946 A GB 2879946A GB 622491 A GB622491 A GB 622491A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- potential
- output
- resistor
- over
- 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
- 239000003990 capacitor Substances 0.000 abstract 4
- 230000004048 modification Effects 0.000 abstract 3
- 238000012986 modification Methods 0.000 abstract 3
- 230000000903 blocking effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/38—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
- H03F3/40—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
622,491. Valve amplifying circuits. BRITISH THOMSON-HOUSTON CO., Ltd., and MACKENZIE, T. H. Sept. 26, 1946, No. 28799. [Class 40 (vi)] In a D.C. amplifier of the type wherein the input is used to modulate the input to an A.C. amplifier, the output being de-modulated, a fraction of the D.C. output is fed back in a negative sense into the D.C. input. A D.C. potential applied to resistor 2, Fig. 1, is supplied together with a feedback potential over resistor 9, to the upper contact of a switch 5 reversing at a rate of 50 times per second. The alternating component is fed to the grid of valve 4 over a blocking capacitor, an amplified and reversed output appearing at the anode. This potential is fed over capacitor 15 to a switch 14 operated synchronously with switch 5. The capacitor 11 assumes a steady potential, an amplified and inverted potential appearing across the output load 12. A fraction of the output potential is tapped off over the network 7, 8 and is applied over resistor 9 to reduce the effective input to the valve 4. In a modification, Fig. 3, the output load is in the cathode lead of valve 10 and is applied to the lower contact of switch 5. The effective capacity of capacitor 11 may be increased by connecting it between grid and anode, Fig. 4 (not shown), or between grid and earth, Fig. 5 (not shown), as appropriate. In a further modification, Fig. 6 (not shown), the switch 5, Fig. 1, is arranged to short the junction of resistors 2 and 9 to earth. In a further modification, Fig. 7 (not shown), the switch 14 is replaced by a non-linear resistor, a source of high frequency being switched to supply energy to the resistor in synchronism with the operation of switch 5. Specification 472,951 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2879946A GB622491A (en) | 1946-09-26 | 1946-09-26 | Improvements in electronic amplifiers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2879946A GB622491A (en) | 1946-09-26 | 1946-09-26 | Improvements in electronic amplifiers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB622491A true GB622491A (en) | 1949-05-03 |
Family
ID=10281363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2879946A Expired GB622491A (en) | 1946-09-26 | 1946-09-26 | Improvements in electronic amplifiers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB622491A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2906830A (en) * | 1955-01-17 | 1959-09-29 | Link Aviation Inc | Direct current amplifier |
-
1946
- 1946-09-26 GB GB2879946A patent/GB622491A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2906830A (en) * | 1955-01-17 | 1959-09-29 | Link Aviation Inc | Direct current amplifier |
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