GB480417A - Improvements in high frequency signal amplifiers - Google Patents
Improvements in high frequency signal amplifiersInfo
- Publication number
- GB480417A GB480417A GB15440/37A GB1544037A GB480417A GB 480417 A GB480417 A GB 480417A GB 15440/37 A GB15440/37 A GB 15440/37A GB 1544037 A GB1544037 A GB 1544037A GB 480417 A GB480417 A GB 480417A
- Authority
- GB
- United Kingdom
- Prior art keywords
- input
- signal
- grid
- anode
- change
- 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
- 238000004804 winding Methods 0.000 abstract 1
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
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
- H03F1/14—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means
- H03F1/16—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
480,417. Valve amplifying circuits. PHILCO RADIO & TELEVISION CORPORATION. June 3, 1937, No. 15440. Convention date, July 3, 1936. [Class 40 (v)] In a high-frequency amplifier a signal of opposite phase to that applied to the control grid is applied to a second grid which has a greater capacitance to the anode than has the control grid. The ratio of the amplitudes of the signal applied to the two grids.is preferably inversely proportional to the capacities between the respective grids and the anode. The Figure shows a pentode with a tertiary winding L3 on the input transformer connected to the suppressor grid. The invention is applicable to signal or intermediate frequency amplifiers and enables high gain to be obtained with stability and renders the dynamic input admittance substantially zero. The high impedance input and output circuits which are employed cause the change in the input capacity of the valve consequent on change in bias to vary tuning so'that selectivity is reduced as stage gain is reduced.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US88853A US2154327A (en) | 1936-07-03 | 1936-07-03 | Signal amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
GB480417A true GB480417A (en) | 1938-02-22 |
Family
ID=22213874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15440/37A Expired GB480417A (en) | 1936-07-03 | 1937-06-03 | Improvements in high frequency signal amplifiers |
Country Status (2)
Country | Link |
---|---|
US (1) | US2154327A (en) |
GB (1) | GB480417A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1005576B (en) * | 1954-11-06 | 1957-04-04 | Lorenz C Ag | Circuit arrangement for the neutralization of HF, in particular IF stages, with the aid of bridge circuits |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE476622A (en) * | 1941-04-07 | |||
BE471791A (en) * | 1945-08-27 | |||
US2770683A (en) * | 1952-06-18 | 1956-11-13 | Philco Corp | Neutralized amplifier circuit |
-
1936
- 1936-07-03 US US88853A patent/US2154327A/en not_active Expired - Lifetime
-
1937
- 1937-06-03 GB GB15440/37A patent/GB480417A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1005576B (en) * | 1954-11-06 | 1957-04-04 | Lorenz C Ag | Circuit arrangement for the neutralization of HF, in particular IF stages, with the aid of bridge circuits |
Also Published As
Publication number | Publication date |
---|---|
US2154327A (en) | 1939-04-11 |
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