GB375273A - Improvements in or relating to thermionic valve circuit arrangements - Google Patents
Improvements in or relating to thermionic valve circuit arrangementsInfo
- Publication number
- GB375273A GB375273A GB38243/30A GB3824330A GB375273A GB 375273 A GB375273 A GB 375273A GB 38243/30 A GB38243/30 A GB 38243/30A GB 3824330 A GB3824330 A GB 3824330A GB 375273 A GB375273 A GB 375273A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- dec
- operates
- constant output
- valves
- 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
- 230000003321 amplification Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 239000011800 void material Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
375,273. Valve-amplifying circuits. KRAMOLIN, L. L. DE, 35, Landshuterstrasse, Berlin. Dec. 18, 1930, No. 38243. Convention date, Dec. 18, 1929. Void [Published under Sect. 91 of the Acts]. [Class 40 (v).] An automatic gain control system comprises two valves having different operating character. istics so that for weak signals one valve has little effect, whereas for strong signals it opposes the amplifying action of the other valve to give practically constant output. Fig. 1 shows a pair of push-pull valves 2, 3, one of which operates on the straight part of its characteristic while the other has a curved characteristic and operates at a point to the left of the lower bend. A fairly constant output is thus applied to the rectifying valve 5. In Fig. 4 a negatively biased rectifier 8 is con. nected in parallel with the amplifier 7. For weak signals valve 8 is almost inactive, while with large inputs it draws a large anode current, thus increasing the voltage drop across resistance W and thereby decreasing the amplification of valve 7 by reducing the applied anode voltage. A manual volume control may also be provided in the stage following the automatic control stage.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE375273X | 1929-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB375273A true GB375273A (en) | 1932-06-23 |
Family
ID=6344067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB38243/30A Expired GB375273A (en) | 1929-12-18 | 1930-12-18 | Improvements in or relating to thermionic valve circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB375273A (en) |
-
1930
- 1930-12-18 GB GB38243/30A patent/GB375273A/en not_active Expired
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