GB678615A - Improvements relating to thermionic valve amplifiers - Google Patents
Improvements relating to thermionic valve amplifiersInfo
- Publication number
- GB678615A GB678615A GB1535749A GB1535749A GB678615A GB 678615 A GB678615 A GB 678615A GB 1535749 A GB1535749 A GB 1535749A GB 1535749 A GB1535749 A GB 1535749A GB 678615 A GB678615 A GB 678615A
- Authority
- GB
- United Kingdom
- Prior art keywords
- variations
- valve
- june
- intermediate point
- frequency response
- 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
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
678,615. Valve amplifying circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd. June 9, 1950 [June 9, 1949], No. 15357/49. Addition to 657,026. Class 40 (vi). A wideband amplifier giving a flat response of the type described in the parent Specification comprises an impedance 7, 11 in the anode circuit of a valve 2, a connection being made from an ' intermediate point to the grid to provide negative feed-back while a further valve 1 supplies current variations to the intermediate point in proportion to the input signal. The time constants formed by the resistors 7, 11 and the stray capacities 12, 13 are such as to cause cut-off at high frequencies and are so proportioned as to give the amplifier a substantially flat frequency response. The current flowing through the common resistor 3 remains substantially constant due to opposite variations in the current through the valves 1, 2 but a decoupling capacitor 4 is provided to prevent degeneration at high frequencies. The high frequency response may be improved by employing an inductor 16 or a capacitor 17. In a modification, Fig. 2 (not shown), signal variations from a cathode follower are applied to the remote end of resistor 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1535749A GB678615A (en) | 1949-06-09 | 1949-06-09 | Improvements relating to thermionic valve amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1535749A GB678615A (en) | 1949-06-09 | 1949-06-09 | Improvements relating to thermionic valve amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB678615A true GB678615A (en) | 1952-09-03 |
Family
ID=10057727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1535749A Expired GB678615A (en) | 1949-06-09 | 1949-06-09 | Improvements relating to thermionic valve amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB678615A (en) |
-
1949
- 1949-06-09 GB GB1535749A patent/GB678615A/en not_active Expired
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