GB918860A - Improvements in or relating to transistor amplifiers - Google Patents
Improvements in or relating to transistor amplifiersInfo
- Publication number
- GB918860A GB918860A GB4041759A GB4041759A GB918860A GB 918860 A GB918860 A GB 918860A GB 4041759 A GB4041759 A GB 4041759A GB 4041759 A GB4041759 A GB 4041759A GB 918860 A GB918860 A GB 918860A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- collector
- direct current
- emitter
- stabilized
- 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
-
- 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
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
918,860. Transistor amplifiers. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 27, 1959 [Dec. 2, 1958], No. 40417/59. Class 40 (6). In a low-noise transistor amplifier the working point of transistor 1 having a base resistor 5 is stabilized by the collector direct current of a later transistor 2 conducted by way of the emitter-collector path of transistor 1, transistor 2 being stabilized by means of negative feedback in emitter resistor 6 and by voltage divider 7, 8. With such an arrangement the emitter direct current variations occurring in transistor 1 correspond to the direct current variations in transistor 2 which latter variations remain within permissible limits. In a further embodiment, Fig. 2 (not shown), a third transistor is connected beyond transistor 2, the base resistor 5 of transistor 1 being connected to the collector of the third transistor so as to produce negative feed-back. The third transistor may be operated in common collector arrangement in order that the amplifier may be connected to a cable.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN15922A DE1087639B (en) | 1958-12-02 | 1958-12-02 | Multi-stage, low-noise transistor amplifier with operating point stabilization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB918860A true GB918860A (en) | 1963-02-20 |
Family
ID=7340113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4041759A Expired GB918860A (en) | 1958-12-02 | 1959-11-27 | Improvements in or relating to transistor amplifiers |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1087639B (en) |
| FR (1) | FR1241645A (en) |
| GB (1) | GB918860A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4240881C1 (en) * | 1992-12-04 | 1994-03-31 | Sel Alcatel Ag | Transistor amplifier cascade |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1033261B (en) * | 1954-02-10 | 1958-07-03 | Internat Stadard Electric Corp | Multi-stage transistor amplifier for alternating currents with stabilization of the transistor operating points |
-
1958
- 1958-12-02 DE DEN15922A patent/DE1087639B/en active Pending
-
1959
- 1959-11-27 GB GB4041759A patent/GB918860A/en not_active Expired
- 1959-11-30 FR FR811694A patent/FR1241645A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1241645A (en) | 1960-09-16 |
| DE1087639B (en) | 1960-08-25 |
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