GB480209A - Automatic biassing circuit for thermionic amplifying tubes - Google Patents
Automatic biassing circuit for thermionic amplifying tubesInfo
- Publication number
- GB480209A GB480209A GB35402/36A GB3540236A GB480209A GB 480209 A GB480209 A GB 480209A GB 35402/36 A GB35402/36 A GB 35402/36A GB 3540236 A GB3540236 A GB 3540236A GB 480209 A GB480209 A GB 480209A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- rectifier
- anode
- negative bias
- voltage
- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
480,209. Valve amplifying circuits. MAGYAR WOLFRAMLAMPA GYAR KREMENEZKY JANOS R.T. Dec. 24,1936, No. 35402. Convention date, Dec. 24, 1935. [Class 40 (v)] An amplifying circuit of the kind in which the output valve is biassed practically to cut-off in the absence of signals, the fixed negative bias being opposed by a positive bias derived from rectification of signal voltage so that the anode current increases with signal intensity, is characterized by Coupling the output valve control grid to the anode side of the anode circuit of the preceding stage over a condenser. The invention has for its object to prevent distortion due to heavy negative bias on large signals. In the Figure, the constrol grid of an output pentode 1 is normally biassed to cut-off with no signal by the source C through the rectifier 9. With a large signal the voltage across the rectifier due to the signal is opposed to that applied from C so that the negative bias is reduced. The rectifier should be such that it passes a minimum current of 0À2 microamperes in either direction with an applied voltage of 1 volt; also the slope of the characteristic within the working range should be less than the conductance of the anode circuit of the preceding stage. The rectifier may be associated with series and/or parallel resistances to satisfy the above requirements, Figs. 2-5 (not shown). Specifications 388,292 and 439,205 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU480209X | 1935-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB480209A true GB480209A (en) | 1938-02-18 |
Family
ID=10979302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35402/36A Expired GB480209A (en) | 1935-12-24 | 1936-12-24 | Automatic biassing circuit for thermionic amplifying tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB480209A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2117591A (en) * | 1982-03-18 | 1983-10-12 | Western Electric Co | Improvements in or relating to amplifiers |
-
1936
- 1936-12-24 GB GB35402/36A patent/GB480209A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2117591A (en) * | 1982-03-18 | 1983-10-12 | Western Electric Co | Improvements in or relating to amplifiers |
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