GB296677A - Improvements in or relating to radio and the like high frequency circuits - Google Patents
Improvements in or relating to radio and the like high frequency circuitsInfo
- Publication number
- GB296677A GB296677A GB25276/28A GB2527628A GB296677A GB 296677 A GB296677 A GB 296677A GB 25276/28 A GB25276/28 A GB 25276/28A GB 2527628 A GB2527628 A GB 2527628A GB 296677 A GB296677 A GB 296677A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- effected
- grid
- tuning
- coupling
- 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
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 230000001172 regenerating effect Effects 0.000 abstract 1
- 238000012216 screening 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)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Amplifiers (AREA)
Abstract
296,677. Marconi's Wireless Telegraph Co., Ltd., (Assignees of Roberts, W. van B.). Sept. 3, 1927, [Convention date]. Thermionic amplifiers.-In a neutralized circuit feed back of energy from the output to the input exists slightly b u t regenerative action at all frequencies is suppressed completely without variation of the bridge constants. Fig. 2 shows the bridge circuit comprising filament 1, grid 2 and plate 3 of the valve and grid-plate capacity C3, neutralizing condenser C4 and tuning condenser C5. The Specification shows mathematically that the conditions are satisfied if condensers C3, C4, C5 and the inductance ratio between coils L1, L2 are maintained constant and the mutual inductance between coils L1, L, is made zero. Tuning is effected by varying the inductances L1, L2 while maintaining their ratio constant as by a coupling 10, and zero coupling between coils L1, L2 is effected by spacing or screening.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US217368A US1861585A (en) | 1927-09-03 | 1927-09-03 | Neutralizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB296677A true GB296677A (en) | 1929-08-15 |
Family
ID=22810783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25276/28A Expired GB296677A (en) | 1927-09-03 | 1928-09-03 | Improvements in or relating to radio and the like high frequency circuits |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1861585A (en) |
| GB (1) | GB296677A (en) |
-
1927
- 1927-09-03 US US217368A patent/US1861585A/en not_active Expired - Lifetime
-
1928
- 1928-09-03 GB GB25276/28A patent/GB296677A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1861585A (en) | 1932-06-07 |
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