GB840953A - Improvements in or relating to alternating current amplifier circuits - Google Patents
Improvements in or relating to alternating current amplifier circuitsInfo
- Publication number
- GB840953A GB840953A GB3847558A GB3847558A GB840953A GB 840953 A GB840953 A GB 840953A GB 3847558 A GB3847558 A GB 3847558A GB 3847558 A GB3847558 A GB 3847558A GB 840953 A GB840953 A GB 840953A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- collector
- base
- potential
- capacitor
- 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
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- 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
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
- H03F1/302—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in bipolar transistor amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
840,953. Transistor amplifying circuits. SIEMENS & HALSKE A.G. Nov. 28, 1958 [Nov. 28, 1957], No. 38475/58. Class 40(6). An amplifier has a first and second transistor each connected in a grounded emitter circuit with a capacitor connected directly between the collector of the first and the base of the second, and with a variable resistance path provided across the capacitor. In the embodiment shown, a driver stage for a push-pull amplifier has a transistor 8 in an earthed emitter circuit with its collector taken to the voltage source through a potentiometer 9. The tap of the potentiometer is connected through a variable resistor 10 to the base of a second transistor 1, and a further connection is made to the base of this transistor from the collector of transistor 8 through a capacitor 11. The standing base potential on transistor 8 is adjusted by means of a potential divider formed by the preset resistor 13 and the fixed resistor 14. Increase in temperature results in a fall in D.C. potential at the collector of the transistor 8, this fall producing a corresdonding drop in base potential of transistor 1 to compensate for the rise in collector current of this transistor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES0056045 | 1957-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB840953A true GB840953A (en) | 1960-07-13 |
Family
ID=7490830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3847558A Expired GB840953A (en) | 1957-11-28 | 1958-11-28 | Improvements in or relating to alternating current amplifier circuits |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH363377A (en) |
| GB (1) | GB840953A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3534279A (en) * | 1968-08-12 | 1970-10-13 | Rca Corp | High current transistor amplifier stage operable with low current biasing |
-
1958
- 1958-11-20 CH CH6638658A patent/CH363377A/en unknown
- 1958-11-28 GB GB3847558A patent/GB840953A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3534279A (en) * | 1968-08-12 | 1970-10-13 | Rca Corp | High current transistor amplifier stage operable with low current biasing |
Also Published As
| Publication number | Publication date |
|---|---|
| CH363377A (en) | 1962-07-31 |
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