GB609859A - Improvements in high-frequency electrical circuits comprising discharge tubes - Google Patents
Improvements in high-frequency electrical circuits comprising discharge tubesInfo
- Publication number
- GB609859A GB609859A GB8419/46A GB841946A GB609859A GB 609859 A GB609859 A GB 609859A GB 8419/46 A GB8419/46 A GB 8419/46A GB 841946 A GB841946 A GB 841946A GB 609859 A GB609859 A GB 609859A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- grid
- bias
- varying
- controlled
- 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
- 238000013016 damping Methods 0.000 abstract 2
- 238000007689 inspection Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
Landscapes
- Amplifiers (AREA)
Abstract
609,859. Valve amplifying circuits. PHILIPS LAMPS, Ltd. March 19, 1946, No. 8419. Convention date, Aug. 5, 1941. [Class 40 (v)] In an amplifier having a resonant input circuit, the damping of which is increased by negative feedback derived from current carrying electrodes such that the negative feedback also reduces noise currents, gain is controlled by varying the degree of negative feedback. The Figure shows an amplifier 2 with an auxiliary tube 42 in the feedback path with the volume controlled by varying the bias of a grid 45 beyond the operative anode. In addition, the bias of the amplifier may be varied simultaneously in such a manner that the damping of the input circuit remains constant. In a modification, Fig. 3 (not shown), an octode is used as the amplifier with the signal applied to the grid nearest the cathode and the feedback taken from the adjacent anode. The volume is controlled by varying the bias of the signal grid simultaneously with that of the second controlling grid. Specification 22915/46, as open to inspection under Sect. 91, is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL609859X | 1941-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB609859A true GB609859A (en) | 1948-10-07 |
Family
ID=19788062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8419/46A Expired GB609859A (en) | 1941-08-05 | 1946-03-19 | Improvements in high-frequency electrical circuits comprising discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB609859A (en) |
-
1946
- 1946-03-19 GB GB8419/46A patent/GB609859A/en not_active Expired
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