GB446018A - Improvements in or relating to superheterodyne radio receivers - Google Patents
Improvements in or relating to superheterodyne radio receiversInfo
- Publication number
- GB446018A GB446018A GB31027/34A GB3102734A GB446018A GB 446018 A GB446018 A GB 446018A GB 31027/34 A GB31027/34 A GB 31027/34A GB 3102734 A GB3102734 A GB 3102734A GB 446018 A GB446018 A GB 446018A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oct
- coil
- coupling
- high frequency
- frequency amplifier
- 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
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/18—Modifications of frequency-changers for eliminating image frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Superheterodyne Receivers (AREA)
Abstract
446,018. Impedance networks. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London. -(Assignees of Yolles, J. ; 2361, 64th Street, Brooklyn, New York, U.S.A.) Oct. 29, 1934, No. 31027. Convention date, Oct. 28, 1933. [Class 40 (iii)] In order to effect image frequency suppression in a signal selector circuit of a superheterodyne receiver which comprises two coils 3 and 4, 5 which are magnetically and capacitatively coupled to obtain a flat gain characteristic, the tunable secondary circuit 4, 5 is tapped at 6 for connection to the grid of the following valve 2, the magnetic coupling existing only between the coil 3 and the low potential secondary portion 4, while the capacity coupling is provided by a coil 9 arranged near the tapping 6 and connected at one end only to the high potential end of the primary 3. The winding 3 has a natural frequency below but close to the range of the tuned secondary. The coupling may be between an aerial 1 and a high frequency amplifier 2 or between two valves such as a high frequency amplifier and first detector.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US695596A US2027949A (en) | 1933-10-28 | 1933-10-28 | Image suppression arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB446018A true GB446018A (en) | 1936-04-23 |
Family
ID=24793661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31027/34A Expired GB446018A (en) | 1933-10-28 | 1934-10-29 | Improvements in or relating to superheterodyne radio receivers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2027949A (en) |
| FR (1) | FR780260A (en) |
| GB (1) | GB446018A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3593154A (en) * | 1969-01-28 | 1971-07-13 | Zenith Radio Corp | Frequency-selective coupling network for a television tuner |
| US4186350A (en) * | 1977-04-19 | 1980-01-29 | Fujitsu Ten Limited | Antenna tuning circuit |
-
1933
- 1933-10-28 US US695596A patent/US2027949A/en not_active Expired - Lifetime
-
1934
- 1934-10-27 FR FR780260D patent/FR780260A/en not_active Expired
- 1934-10-29 GB GB31027/34A patent/GB446018A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2027949A (en) | 1936-01-14 |
| FR780260A (en) | 1935-04-23 |
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