GB403425A - Improvements in or relating to modulation systems for use in radio and other carrier frequency signalling systems - Google Patents
Improvements in or relating to modulation systems for use in radio and other carrier frequency signalling systemsInfo
- Publication number
- GB403425A GB403425A GB17459/32A GB1745932A GB403425A GB 403425 A GB403425 A GB 403425A GB 17459/32 A GB17459/32 A GB 17459/32A GB 1745932 A GB1745932 A GB 1745932A GB 403425 A GB403425 A GB 403425A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- modulating
- valves
- choke
- anodes
- 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
- 230000011664 signaling Effects 0.000 title 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
- H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
- H03C1/20—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to anode
Landscapes
- Amplifiers (AREA)
- Microwave Amplifiers (AREA)
Abstract
403,425. Valve modulating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London, and PRICE, T. H., 17, Sandford Road, Chelmsford. June 20, 1932, No. 17459. [Class 40 (v).] A modulation system comprises a push-pull pair of high-frequency valves with no centrepoint tapping to the tuned circuit connecting the anodes, the high tension and the modulating potentials being applied to the anode circuit of each valve through high frequency chokes. As shown in Fig. 1, the carrier wave is amplified by a pushpull pair of valves V1, V2 the tuned output circuit 5 being connected through condensers 7, 8 between the two anodes. The HT supply leads to the anodes include separate highfrequency chokes 9, 10 and a common speechfrequency choke 12, which latter is also in the plate feed circuit of the valve V3. Modulating- voltage is applied to the grid of the valve V3. In a modification (Fig. 2, not shown), the choke 12 is omitted, and the modulating-valve V3 is connected in series with the carrier amplifiers V1, V2, a high-frequency choke being connected between the cathodes of the valves V1, V2 and the anode of the valve V3.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE397038D BE397038A (en) | 1932-06-20 | ||
| GB17459/32A GB403425A (en) | 1932-06-20 | 1932-06-20 | Improvements in or relating to modulation systems for use in radio and other carrier frequency signalling systems |
| US674984A US2013807A (en) | 1932-06-20 | 1933-06-09 | Modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17459/32A GB403425A (en) | 1932-06-20 | 1932-06-20 | Improvements in or relating to modulation systems for use in radio and other carrier frequency signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB403425A true GB403425A (en) | 1933-12-20 |
Family
ID=10095544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17459/32A Expired GB403425A (en) | 1932-06-20 | 1932-06-20 | Improvements in or relating to modulation systems for use in radio and other carrier frequency signalling systems |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2013807A (en) |
| BE (1) | BE397038A (en) |
| GB (1) | GB403425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2572016A (en) * | 1946-04-24 | 1951-10-23 | Emi Ltd | Thermionic valve circuits |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2549828A (en) * | 1945-08-30 | 1951-04-24 | Melvin L Leppert | Modulation system |
| DE1075679B (en) * | 1956-05-23 | 1960-02-18 | Auguste Casanova Saint Eugene Jean (Algerien) | Electronic modulator |
| US3268835A (en) * | 1964-12-23 | 1966-08-23 | James W Bryan | Push-pull plate modulator |
-
0
- BE BE397038D patent/BE397038A/xx unknown
-
1932
- 1932-06-20 GB GB17459/32A patent/GB403425A/en not_active Expired
-
1933
- 1933-06-09 US US674984A patent/US2013807A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2572016A (en) * | 1946-04-24 | 1951-10-23 | Emi Ltd | Thermionic valve circuits |
Also Published As
| Publication number | Publication date |
|---|---|
| BE397038A (en) | |
| US2013807A (en) | 1935-09-10 |
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