GB696848A - Improvements in and relating to electron discharge valve amplifiers - Google Patents
Improvements in and relating to electron discharge valve amplifiersInfo
- Publication number
- GB696848A GB696848A GB847151A GB847151A GB696848A GB 696848 A GB696848 A GB 696848A GB 847151 A GB847151 A GB 847151A GB 847151 A GB847151 A GB 847151A GB 696848 A GB696848 A GB 696848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- output
- anode
- negative feed
- cathode
- 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
- 230000007423 decrease Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/04—Manually-operated control in untuned amplifiers
- H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
- H03G3/08—Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback
Landscapes
- Adjustable Resistors (AREA)
Abstract
696,848. Valve amplifying circuits. BRITISH BROADCASTING CORPORATION. March 31, 1952 [April 11, 1951], No. 8471/51. Classes 40 (v) and 40 (vi). Gain control in an amplifier is effected by applying a negative feed-back voltage derived from a high impedance in the anode-cathode path of the final valve to the adjustable tap on a high impedance potentiometer connected between one output terminal of the amplifier and a small resistance in the grid-cathode circuit of an earlier valve. As shown, the potentiometer is connected between the cathode resistor R3 and the output terminal T, the negative feed-back and output voltages being obtained from a resistor R4 in the anode circuit. Upward movement of the slider decreases the proportion of the voltage fed to the output, increases the negative feed-back and reduces the effective value of the anode load of the final valve. Additional stages may be interposed between the two valves. Zero output when the slider is in the uppermost position may be ensured by combining the control with an on-off switch which becomes effective in the uppermost position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB847151A GB696848A (en) | 1951-04-11 | 1951-04-11 | Improvements in and relating to electron discharge valve amplifiers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB847151A GB696848A (en) | 1951-04-11 | 1951-04-11 | Improvements in and relating to electron discharge valve amplifiers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB696848A true GB696848A (en) | 1953-09-09 |
Family
ID=9853099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB847151A Expired GB696848A (en) | 1951-04-11 | 1951-04-11 | Improvements in and relating to electron discharge valve amplifiers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB696848A (en) |
-
1951
- 1951-04-11 GB GB847151A patent/GB696848A/en not_active Expired
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