GB1095041A - Improvements relating to transistor circuits - Google Patents
Improvements relating to transistor circuitsInfo
- Publication number
- GB1095041A GB1095041A GB165264A GB165264A GB1095041A GB 1095041 A GB1095041 A GB 1095041A GB 165264 A GB165264 A GB 165264A GB 165264 A GB165264 A GB 165264A GB 1095041 A GB1095041 A GB 1095041A
- Authority
- GB
- United Kingdom
- Prior art keywords
- collector
- emitter
- base
- terminals
- unit
- 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
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000014509 gene expression Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/34—DC amplifiers in which all stages are DC-coupled
- H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only
- H03F3/3432—DC amplifiers in which all stages are DC-coupled with semiconductor devices only with bipolar transistors
- H03F3/3435—DC amplifiers in which all stages are DC-coupled with semiconductor devices only with bipolar transistors using Darlington amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
1,095,041. Transistor circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Dec. 17, 1964 [Jan. 14, 1964], No. 1652/64. Heading H3T. A circuit having selectable current gain characteristics comprises a first transistor T1 having impedances R1, R2 connected as shown, impedance R1 being connected in series with an electrode of a further transistor T2 in such a way that the overall current gain of the circuit is dependent on the ratio of the moduli of R1 and R2. As shown in Fig. 11, terminal B of unit U (Fig. 1) is connected to the collector of T2 whilst the collector of T1 is connected to the base of T2. In Fig. 3 (not shown) terminals B or E are connected to the base of T2. In Figs. 4 to 9 (not shown) terminals E or B of unit U are connected to the emitter of T2. In Figs. 10 to 15 (not shown) terminals B or E of unit U are connected to the collector of T2. In all embodiments, the collector of T1 is either connected to ground through an negligible impedance or connected to one of the remaining electrodes of T2. In Fig. 11, base bias for T1 may be provided by a Zener diode connected in series with terminal B. In Fig. 2 (not shown) T1 is replaced by a compound emitter follower. Impedances R1, R2 should be high compared with the emitter and base resistances of T1; this may result in an increase of input impedance. Expressions are given for commonbase and common-emitter current gain for all embodiments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB165264A GB1095041A (en) | 1964-01-14 | 1964-01-14 | Improvements relating to transistor circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB165264A GB1095041A (en) | 1964-01-14 | 1964-01-14 | Improvements relating to transistor circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1095041A true GB1095041A (en) | 1967-12-13 |
Family
ID=9725675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB165264A Expired GB1095041A (en) | 1964-01-14 | 1964-01-14 | Improvements relating to transistor circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1095041A (en) |
-
1964
- 1964-01-14 GB GB165264A patent/GB1095041A/en not_active Expired
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