GB863336A - Improvements in or relating to transistor circuit arrangements - Google Patents
Improvements in or relating to transistor circuit arrangementsInfo
- Publication number
- GB863336A GB863336A GB36225/58A GB3622558A GB863336A GB 863336 A GB863336 A GB 863336A GB 36225/58 A GB36225/58 A GB 36225/58A GB 3622558 A GB3622558 A GB 3622558A GB 863336 A GB863336 A GB 863336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- resistor
- circuit
- resistance
- collector current
- 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
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
863,336. Transistor circuits. SIEMENS & HALSKE A.G. Nov.11, 1958 [Nov. 13, 1957], No. 36225/58. Class 40(6) A temperature compensating arrangement including a temperature-dependent circuit element is connected to the input terminals of a transistor circuit, the arrangement also including a further circuit element which causes the resistance of the compensating circuit across the transistor input to remain substantially constant. A P-N-P transistor 1, Fig. 1, is connected in a common emitter circuit, and a voltage divider consisting of resistors 2 and 3 is connected between terminals 10 and 11 of the voltage source, the resistor 3 having a negative temperature coefficient and the resistor 2 having a positive temperature coefficient. The junction 6 between the resistor 2 and resistor 3 is connected through resistor 4 to the base electrode of the transistor 1. If the temperature rises the resistance of the negative temperature coefficient resistor 3 is reduced and as a result the potential of the junction 6 becomes more positive and the base current of the transistor is reduced tending to reduce the collector current. The values of the circuit elements are adjusted such that the reduction of collector current due to the reduction of base current balances the increase of collector current due to rise in temperature so that the collector current actually remains substantially constant. The sensitivity of the arrangement remains constant due to the resistance of resistor 4 being high relative to the input resistance of the transistor. In a modification (Fig. 2, not shown) a capacitor is connected in series with the input lead for A.C. inputs. In a second embodiment (Fig. 3, not shown) a number of circuits such as shown in Fig. 1 are all connected across a common potential divider whilst in a third embodiment (Fig. 4, not shown) the circuit is used in an amplifier for a photo-electric device, the amplifier output circuit comprising a relay shunted by a diode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE863336X | 1957-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB863336A true GB863336A (en) | 1961-03-22 |
Family
ID=6801102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36225/58A Expired GB863336A (en) | 1957-11-13 | 1958-11-11 | Improvements in or relating to transistor circuit arrangements |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1208644A (en) |
| GB (1) | GB863336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473793A (en) * | 1981-03-26 | 1984-09-25 | Dbx, Inc. | Bias generator |
-
1958
- 1958-11-11 GB GB36225/58A patent/GB863336A/en not_active Expired
- 1958-11-13 FR FR1208644D patent/FR1208644A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473793A (en) * | 1981-03-26 | 1984-09-25 | Dbx, Inc. | Bias generator |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1208644A (en) | 1960-02-24 |
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