GB1283170A - A bias device for amplifier transistors - Google Patents
A bias device for amplifier transistorsInfo
- Publication number
- GB1283170A GB1283170A GB2253271A GB2253271A GB1283170A GB 1283170 A GB1283170 A GB 1283170A GB 2253271 A GB2253271 A GB 2253271A GB 2253271 A GB2253271 A GB 2253271A GB 1283170 A GB1283170 A GB 1283170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- voltage
- input
- terminal
- amplifier
- 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
- 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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0261—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
1283170 Transistor amplifying circuits THOMSON-CSF 19 April 1971 [27 Feb 1970] 22532/71 Heading H3T A transistor amplifier is biased by the combination of a thermally-dependent voltage and a voltage proportional to the power dissipated in the transistor. Transistor amplifier 1, Fig. 1, receives signal at terminal E, bias at terminal 2, and provides an output at terminal S. The bias at terminal 2 comprises the output of a differential amplifier 3, the input at the in-phase input 4 of which comprises the sum of the voltage from an adjustable bias source 5 and the voltage from reference voltage 7 which comprises a junction diode heated in the neighbourhood of the transistor 1. The input at the out-of-phase input 9 is derived over an R.C. modulating circuit 10 from the output of a multiplier 11, the two inputs 12, 13 of which respectively comprise a voltage proportional to the current in and voltage across, amplifier 1. The input 12 may be derived from a differential amplifier 50, Fig. 2, the inputs of which are connected across a resistor 24 of small value in the collector circuit of transistor 20, while input 13 is derived from potentiometer 13, connected between the collector of transistor 21 via diode rectifier 26 and one end of resistor 24.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7007188A FR2080248A5 (en) | 1970-02-27 | 1970-02-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1283170A true GB1283170A (en) | 1972-07-26 |
Family
ID=9051422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2253271A Expired GB1283170A (en) | 1970-02-27 | 1971-04-19 | A bias device for amplifier transistors |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE763097A (en) |
DE (1) | DE2109221A1 (en) |
FR (1) | FR2080248A5 (en) |
GB (1) | GB1283170A (en) |
NL (1) | NL7102627A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU690175B2 (en) * | 1994-02-11 | 1998-04-23 | Alcatel N.V. | Power amplifier for mobile station |
-
1970
- 1970-02-27 FR FR7007188A patent/FR2080248A5/fr not_active Expired
-
1971
- 1971-02-17 BE BE763097A patent/BE763097A/en unknown
- 1971-02-26 DE DE19712109221 patent/DE2109221A1/en active Pending
- 1971-02-26 NL NL7102627A patent/NL7102627A/xx unknown
- 1971-04-19 GB GB2253271A patent/GB1283170A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU690175B2 (en) * | 1994-02-11 | 1998-04-23 | Alcatel N.V. | Power amplifier for mobile station |
Also Published As
Publication number | Publication date |
---|---|
NL7102627A (en) | 1971-08-31 |
BE763097A (en) | 1971-07-16 |
DE2109221A1 (en) | 1971-09-09 |
FR2080248A5 (en) | 1971-11-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |