GB520882A - Improvements in and relating to amplifier circuits - Google Patents
Improvements in and relating to amplifier circuitsInfo
- Publication number
- GB520882A GB520882A GB28452/38A GB2845238A GB520882A GB 520882 A GB520882 A GB 520882A GB 28452/38 A GB28452/38 A GB 28452/38A GB 2845238 A GB2845238 A GB 2845238A GB 520882 A GB520882 A GB 520882A
- Authority
- GB
- United Kingdom
- Prior art keywords
- multiplier
- current
- electrodes
- resistance
- grid
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
- H01J43/025—Circuits therefor
Landscapes
- Amplifiers (AREA)
Abstract
520,882. Thermionic valve circuits; electron multipliers. VEREINIGTE GLUHLAMPEN UND ELEKTRIZITATS AKT.-GES. Sept. 30, 1938, No. 28452. Convention date, Sept. 30, 1937. [Classes 39 (i) and 40 (v)] In an amplifier circuit containing one or more electron-multiplier tubes (i) the no-load voltage on the multiplier electrodes exceeds 50 volts referred to the primary cathode in the first multiplier tube and with respect to the previous multiplier electrode for succeeding tubes, the no-load voltage being less than the working voltage, and (ii) the direct current from the multiplier electrode or electrodes is fed to the anode or anodes of an amplifier valve or valves in the circuit. A mains rectifier also supplies to these valves in parallel with the above supply; a saving in current is thereby effected. The multiplier tubes 1, 1<SP>1</SP>, 1<SP>11</SP>, Fig. 2, are arranged in cascade, the anode 5 of 1 being connected to the grid 31 of 11 ; the anode 5<SP>11</SP> of the last multiplier tube 1<SP>11</SP> is connected to the grid of the valve 20 whose anode is connected to the output-circuit terminal 0 and over resistance 31 and decoupling coils 19, 19<SP>1</SP>; 19<SP>11</SP> to the multiplier electrodes 6, 6<SP>1</SP>, 6<SP>11</SP>. The potential of the electrodes is derived from the auxiliary source V, the resistance 29 and the valve 20 forming a divider for the potential applied to the multiplier electrodes. In a modification (Fig. 3, not shown) a separate potential source is used for the multiplier electrodes and a stabilizing loading resistance 32 may be used in shunt to the valve 20 ; a loud speaker coil may be used as the resistance 32 or 29, Fig. 2. To compensate in the multiplier tubes for variations in the anode current/grid voltage characteristic following change in grid bias and consequent change of current to the multiplier electrode, the multiplier electrode 6, Fig. 4, besides connection to the positive line V is also connected to the cathode through resistance 33 so that the cathode resistance receives current from the electrode 6 ; drop in multiplier current will reduce the grid bias and raise primary current; the arrangement of such compensative multiplier tubes in an amplifier circuit is shown in a further Figure. The grid potential in the tube shown in Fig. 4 is determined by the connections to the supply V over the two resistances 7, 34.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE211193X | 1937-09-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB520882A true GB520882A (en) | 1940-05-07 |
Family
ID=5801355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28452/38A Expired GB520882A (en) | 1937-09-30 | 1938-09-30 | Improvements in and relating to amplifier circuits |
Country Status (4)
Country | Link |
---|---|
US (1) | US2276417A (en) |
CH (1) | CH211193A (en) |
FR (1) | FR844082A (en) |
GB (1) | GB520882A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE457111A (en) * | 1943-08-04 | |||
US2589173A (en) * | 1948-10-22 | 1952-03-11 | Rca Corp | Power supply circuit for multiplier vacuum tubes |
US2798903A (en) * | 1951-03-16 | 1957-07-09 | Henry M Spencer | Signal amplification system |
US2920251A (en) * | 1955-02-28 | 1960-01-05 | Bernard A Sobel | Amplifying system |
GB2256240B (en) * | 1990-03-29 | 1993-09-29 | Automotive Products Plc | A friction clutch |
GB2242501A (en) * | 1990-03-29 | 1991-10-02 | Automotive Products Plc | A friction clutch |
-
1938
- 1938-09-07 CH CH211193D patent/CH211193A/en unknown
- 1938-09-29 FR FR844082D patent/FR844082A/en not_active Expired
- 1938-09-30 GB GB28452/38A patent/GB520882A/en not_active Expired
- 1938-09-30 US US232676A patent/US2276417A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR844082A (en) | 1939-07-18 |
CH211193A (en) | 1940-08-31 |
US2276417A (en) | 1942-03-17 |
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