GB885811A - Improvements in or relating to transistor amplifier circuit arrangements - Google Patents
Improvements in or relating to transistor amplifier circuit arrangementsInfo
- Publication number
- GB885811A GB885811A GB35855/60A GB3585560A GB885811A GB 885811 A GB885811 A GB 885811A GB 35855/60 A GB35855/60 A GB 35855/60A GB 3585560 A GB3585560 A GB 3585560A GB 885811 A GB885811 A GB 885811A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- resistor
- gain
- base
- signal
- 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
- 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
- H03G1/0017—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 solid state elements of the amplifier
- H03G1/0023—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 solid state elements of the amplifier in emitter-coupled or cascode amplifiers
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Abstract
885,811. Transistor amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 19, 1960 [Oct. 22, 1959], No. 35855/60. Class 40(6). A gain control arrangement comprises a pair of transistors with a common emitter resistance 3 and with the signal applied to the bases of both. A gain-controlling current is applied to the base of the first transistor 1 and the signal is taken from the collector circuit of the other, across a resistor 6; the base potential of this transistor is maintained constant by means of a potentiometer 7, 8. In addition a self-bias resistor 10 decoupled by condenser 9 may be placed in the emitter lead; this is stated to allow of a lower value to be assigned to resistors 7, 8 thus improving the thermal stability of transistor 2. The arrangement is such that an increase in the control current to the base of the transistor 1 increases the D.C. voltage across resistor 3, so biasing transistor 2 back to a region of lesser gain, and at the same time increase in gain of transistor 1 produces a larger signal across resistor 3, so reducing the signal between base and emitter of transistor 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN17410A DE1164497B (en) | 1959-10-22 | 1959-10-22 | Adjustable transistor circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB885811A true GB885811A (en) | 1961-12-28 |
Family
ID=7340397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35855/60A Expired GB885811A (en) | 1959-10-22 | 1960-10-19 | Improvements in or relating to transistor amplifier circuit arrangements |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1164497B (en) |
| FR (1) | FR1275088A (en) |
| GB (1) | GB885811A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1278524B (en) * | 1965-04-09 | 1968-09-26 | Standard Elektrik Lorenz Ag | Adjustable transistor stage for the power amplification of signals |
| DE1257854B (en) * | 1965-08-11 | 1968-01-04 | Messerschmitt Boelkow Blohm | Controllable AC amplifier with transistors, which comprises a differential amplifier |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT179319B (en) * | 1951-09-14 | 1954-08-10 | Int Standard Electric Corp | Circuit arrangement for gain control |
| US2903522A (en) * | 1955-07-07 | 1959-09-08 | Gen Precision Lab Inc | Transistor amplifier |
| DE1039099B (en) * | 1956-04-20 | 1958-09-18 | Nordwestdeutscher Rundfunk I L | Counter-coupled tube amplifier stage with regulation of the degree of amplification by changing the control grid prestress |
-
1959
- 1959-10-22 DE DEN17410A patent/DE1164497B/en active Pending
-
1960
- 1960-10-18 FR FR841444A patent/FR1275088A/en not_active Expired
- 1960-10-19 GB GB35855/60A patent/GB885811A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1275088A (en) | 1961-11-03 |
| DE1164497B (en) | 1964-03-05 |
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