GB865125A - Improvements in or relating to direct current amplifiers - Google Patents
Improvements in or relating to direct current amplifiersInfo
- Publication number
- GB865125A GB865125A GB31408/59A GB3140859A GB865125A GB 865125 A GB865125 A GB 865125A GB 31408/59 A GB31408/59 A GB 31408/59A GB 3140859 A GB3140859 A GB 3140859A GB 865125 A GB865125 A GB 865125A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- resistors
- valve
- grid
- earth
- 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
- 238000010079 rubber tapping Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/34—DC amplifiers in which all stages are DC-coupled
- H03F3/36—DC amplifiers in which all stages are DC-coupled with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
865,125. Valve amplifying circuits. TELEFUNKEN G.m.b.H. Sept. 15, 1959 [Oct. 31, 1958], No. 31408/59. Class 40(6) A direct current amplifier which is drift-free comprises a cathode-coupled pair having equal anode load resistors Ra<SP>1</SP>, Ra<SP>2</SP> and a common cathode resistor Ra/ 2 of half this value. The supply source 3, 4 is earthed at its centre point and the output taken from the common point of one or other of two pairs of equal resistors Rs connected between the anodes of each of the valves and the cathode end of the resistor Ra/ 2 . The input is applied between earth and the grid of the valve 1, the grid of the other valve being earthed (Fig. 1, not shown). Alternatively, negative feedback may be introduced by returning the grid of the valve 2 to a tap on a resistor Rn connected from the common point of the corresponding anode resistors Rs to earth, symmetry being maintained by connecting a similar resistor between the common point of the second pair of resistors Rs and earth. The tapping points may be other than at the centre, provided that the parts of the source 3, 4, of the resistors Rs and the relationship of the resistor Ra/ 2 to Ra 1 or Ra 2 are in the same ratio.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE865125X | 1958-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB865125A true GB865125A (en) | 1961-04-12 |
Family
ID=6801784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31408/59A Expired GB865125A (en) | 1958-10-31 | 1959-09-15 | Improvements in or relating to direct current amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB865125A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3080531A (en) * | 1958-10-30 | 1963-03-05 | Bailey Meter Co | D.-c. stabilizing amplifier |
| EP0344399A1 (en) * | 1988-05-31 | 1989-12-06 | IKA-Maschinenbau Janke & Kunkel GmbH & Co. KG | Dispersing machine |
-
1959
- 1959-09-15 GB GB31408/59A patent/GB865125A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3080531A (en) * | 1958-10-30 | 1963-03-05 | Bailey Meter Co | D.-c. stabilizing amplifier |
| EP0344399A1 (en) * | 1988-05-31 | 1989-12-06 | IKA-Maschinenbau Janke & Kunkel GmbH & Co. KG | Dispersing machine |
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