GB620848A - Improvements in or relating to circuits for amplifying electrical oscillations - Google Patents
Improvements in or relating to circuits for amplifying electrical oscillationsInfo
- Publication number
- GB620848A GB620848A GB19086/46A GB1908646A GB620848A GB 620848 A GB620848 A GB 620848A GB 19086/46 A GB19086/46 A GB 19086/46A GB 1908646 A GB1908646 A GB 1908646A GB 620848 A GB620848 A GB 620848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mutual conductance
- path
- grid
- low
- june
- 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
- 230000010355 oscillation Effects 0.000 title 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0011—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying tube elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/20—Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/003—Tubes with plural electrode systems
Landscapes
- Amplifiers (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
620,848. Wireless receiving-sets. PHILIPS LAMPS, Ltd. June 26, 1946, No. 19086. Convention date, June 27, 1945. Addition to 620,767. [Class 40 (v)] A thermionic valve amplifier, employing two discharge paths in parallel according to the parent Specification, incorporates a screen grid formed in two insulated parts 3, 3<1>, the latter co-operating with a part of the control grid 2 having uneven winding pitch to give a discharge path having low mutual conductance, and the other part 3 co-operating with an evenly wound part of the grid 2 to give a path with high mutual conductance. The screen grid 3 is connected to the screen grid 3<1> in the low mutual conductance path through a high resistance 10, and to the H.T. supply through a resistance 8. The input, together with a control voltage depending on its amplitude, is applied to the control grid 2. For high inputs, the high mutual conductance path is cut off, while for low inputs, the voltage drop, due to the current flowing in resistances 10, 8, is sufficient to cut off the low mutual conductance path.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE620848X | 1945-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB620848A true GB620848A (en) | 1949-03-31 |
Family
ID=3875672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19086/46A Expired GB620848A (en) | 1945-06-27 | 1946-06-26 | Improvements in or relating to circuits for amplifying electrical oscillations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB620848A (en) |
-
1946
- 1946-06-26 GB GB19086/46A patent/GB620848A/en not_active Expired
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