GB816664A - Improvements in or relating to amplifying circuits - Google Patents
Improvements in or relating to amplifying circuitsInfo
- Publication number
- GB816664A GB816664A GB34315/56A GB3431556A GB816664A GB 816664 A GB816664 A GB 816664A GB 34315/56 A GB34315/56 A GB 34315/56A GB 3431556 A GB3431556 A GB 3431556A GB 816664 A GB816664 A GB 816664A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- anode
- amplifier
- resistor
- supply
- 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
- H03F5/00—Amplifiers with both discharge tubes and semiconductor devices as amplifying elements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
816,664. Amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 9, 1956 [Nov. 14, 1955], No. 34315/56. Class 40 (6). The anode of an amplifier valve is connected to the positive terminal of supply through a transistor, the collector of the transistor being connected to the anode, the emitter through a resistance to the positive terminal of the supply and the base through a low resistance to the supply. The transistor acts as a low resistance for D.C., but a high impedance for A.C., the value of the latter being increased by the presence of the emitter resistor. In the circuit shown, the anode of the amplifier valve is connected to the grid of a cathode follower valve 12 which supplies the screen grid voltage for the amplifier valve through a decoupling circuit and negative feedback, through resistor 24, to the input of the amplifier. In an alternative circuit in which the negative feedback is omitted (Fig. 3, not shown), the screen grid voltage for the amplifier valve is obtained from a tap on the cathode resistor of valve 12 and the decoupling is effected by a capacitor connected across this resistor. In this embodiment the output is taken from the anode of valve 12.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL816664X | 1955-11-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB816664A true GB816664A (en) | 1959-07-15 |
Family
ID=19838906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34315/56A Expired GB816664A (en) | 1955-11-14 | 1956-11-09 | Improvements in or relating to amplifying circuits |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1065881B (en) |
FR (1) | FR1160237A (en) |
GB (1) | GB816664A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3361981A (en) * | 1964-03-25 | 1968-01-02 | Optimation Inc | Ultra-linear d.c. amplifier |
-
0
- DE DENDAT1065881D patent/DE1065881B/en active Pending
-
1956
- 1956-11-09 GB GB34315/56A patent/GB816664A/en not_active Expired
- 1956-11-12 FR FR1160237D patent/FR1160237A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3361981A (en) * | 1964-03-25 | 1968-01-02 | Optimation Inc | Ultra-linear d.c. amplifier |
Also Published As
Publication number | Publication date |
---|---|
DE1065881B (en) | 1959-09-24 |
FR1160237A (en) | 1958-07-09 |
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