GB368286A - Improvements in or relating to radio high frequency receivers - Google Patents
Improvements in or relating to radio high frequency receiversInfo
- Publication number
- GB368286A GB368286A GB3632330A GB3632330A GB368286A GB 368286 A GB368286 A GB 368286A GB 3632330 A GB3632330 A GB 3632330A GB 3632330 A GB3632330 A GB 3632330A GB 368286 A GB368286 A GB 368286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- circuit
- combined
- inductance
- detector
- 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
Abstract
368,286. Valve circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London, KEMP, C. G. and KEMP, L. G., 92, Upper Cedar Road, Southampton. Dec. 2, 1930, No. 36323. [Class 40 (v).] In order to adjust the local oscillator of a superheterodyne receiver to produce an intermediate frequency exactly equal to the middle frequency of the band for which the intermediate frequency amplifier is designed, without interruption of signal traffic, energy from the intermediate amplifier is fed to a branch circuit and combined with local oscillations of a frequency in fixed relation to the desired intermediate frequency, the combined oscillations being detected and the resultant beat (if any) indicated or observed. The Figure shows the push-pull second detector V1, V2 of a superheterodyne receiver fed from the intermediate frequency amplifier through the secondary T1 of a coupling transformer. A branch circuit is led through blocking condensers K1, K2 to a push-pull frequency doubling detector V3, V4 such as described in Specification 347,272. The output circuit comprises either an acceptor circuit C1, L1 tuned to double the input frequency, or part of the inductance of a parallel resonant circuit, or an acceptor circuit whose inductance is part of the inductance of a parallel resonant circuit, all circuits being tuned to twice the input frequency of V3, V4. The output is transferred from Ll to the input L2, C2 of an anode detector V5 and is there combined with local oscillations from V6, transferred through aperiodic couplings L3, L4. The oscillator V6 is adjusted to a frequency twice the middle frequency of the intermediatefrequency band and any beats, detected by V5 and passed to the telephones, indicate incorrect adjustment of the heterodyne oscillator which is readjusted until beats disappear without interrupting signal traffic.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE384633D BE384633A (en) | 1930-12-02 | ||
GB3632330A GB368286A (en) | 1930-12-02 | 1930-12-02 | Improvements in or relating to radio high frequency receivers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3632330A GB368286A (en) | 1930-12-02 | 1930-12-02 | Improvements in or relating to radio high frequency receivers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB368286A true GB368286A (en) | 1932-03-02 |
Family
ID=10387084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3632330A Expired GB368286A (en) | 1930-12-02 | 1930-12-02 | Improvements in or relating to radio high frequency receivers |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE384633A (en) |
GB (1) | GB368286A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2502294A (en) * | 1943-08-19 | 1950-03-28 | Wallace Marcel | Double sweep panoramic radio receiver |
-
0
- BE BE384633D patent/BE384633A/xx unknown
-
1930
- 1930-12-02 GB GB3632330A patent/GB368286A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2502294A (en) * | 1943-08-19 | 1950-03-28 | Wallace Marcel | Double sweep panoramic radio receiver |
Also Published As
Publication number | Publication date |
---|---|
BE384633A (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB539793A (en) | Improvements in or relating to fading compensation in radio receivers | |
GB625258A (en) | Improvements in or relating to modulated carrier wave receivers | |
GB496145A (en) | Improvements in or relating to radio receivers and the like | |
US1935776A (en) | Side band reversal transmission system | |
GB368286A (en) | Improvements in or relating to radio high frequency receivers | |
GB562315A (en) | Improvements in or relating to frequency and phase modulation receivers | |
GB593361A (en) | Improvements in or relating to super-generative receivers | |
GB586534A (en) | Improvements in or relating to super-regenerative radio receivers | |
GB463938A (en) | Improvements in and relating to wireless communication systems | |
GB611626A (en) | Improvements in radio-telegraphy | |
GB467731A (en) | Improvements in and relating to wireless and like receivers | |
GB422866A (en) | Improvements in or relating to radio and other modulated carrier or like receivers | |
GB470366A (en) | Improvements relating to apparatus for transmitting and receiving radio signals | |
GB525826A (en) | Improvements in or relating to radio and television receivers | |
GB466854A (en) | Improvements in or relating to wireless or like receivers of the superheterodyne type | |
US2647992A (en) | Frequency stabilized radio receiving system | |
US1864498A (en) | Two-way radio signaling system | |
GB372692A (en) | Improvements in or relating to heterodyne receivers, suitable for use for wireless and other high frequency reception | |
GB466686A (en) | Improvements in or relating to radio and other high frequency circuit arrangements | |
GB443582A (en) | Improvements in or relating to radio receivers | |
SU73127A1 (en) | Device for automatically maintaining constant carrier frequency | |
GB705685A (en) | Improvements in or relating to mixer circuit arrangements for use at ultra high frequencies | |
GB347272A (en) | Improvements in or relating to thermionic valve frequency multipliers | |
GB469428A (en) | Improvements in or relating to wireless receivers | |
GB460221A (en) | Improvements in or relating to radio receivers |