GB279424A - - Google Patents
Info
- Publication number
- GB279424A GB279424A GB26049/27A GB2604927A GB279424A GB 279424 A GB279424 A GB 279424A GB 26049/27 A GB26049/27 A GB 26049/27A GB 2604927 A GB2604927 A GB 2604927A GB 279424 A GB279424 A GB 279424A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- frequency
- tuned
- modulated
- valves
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
Abstract
279,424. Levy, L. Oct. 22, 1926, [Convention date]. Thermionic heterodyne receivers.-The oscillating valve 2 of a superheterodyne or like receiver is tuned to the same frequency as the receiving valve 3 and is modulated at the required intermediate or secondary frequency. The tuning circuits of the two valves are mechanically coupled to permit simultaneous tuning. The valve 2 is modulated by feeding to its anode oscillations from a valve 1 tuned to the intermediate frequency. As shown, the received and local frequencies are combined in the aerial circuit 6 of the receiving valve. Alternatively, the combination may be made in the anode circuit of a valve having a second grid or plate. Valves 1, 2 may be replaced by a single valve, having more than three electrodes or by a three-electrode valve oscillating at the received and intermediate frequency.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR279424T | 1926-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB279424A true GB279424A (en) | 1928-02-02 |
Family
ID=31897785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26049/27A Expired GB279424A (en) | 1926-10-22 | 1927-10-03 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR623584A (en) |
| GB (1) | GB279424A (en) |
-
1926
- 1926-10-22 FR FR623584D patent/FR623584A/en not_active Expired
-
1927
- 1927-10-03 GB GB26049/27A patent/GB279424A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR623584A (en) | 1927-06-27 |
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