GB458655A - Improvements in or relating to superheterodyne receiving circuits - Google Patents
Improvements in or relating to superheterodyne receiving circuitsInfo
- Publication number
- GB458655A GB458655A GB15411/36A GB1541136A GB458655A GB 458655 A GB458655 A GB 458655A GB 15411/36 A GB15411/36 A GB 15411/36A GB 1541136 A GB1541136 A GB 1541136A GB 458655 A GB458655 A GB 458655A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- wave
- band
- coupled
- filter
- 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)
- Superheterodyne Receivers (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
458,655. Impedance networks. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. June 2, 1936, No. 15411. Convention date, Jan. 6. [Class 40 (iii)] In a superheterodyne receiver image suppression is effected in a band-pass filter by a condenser connected from the input to a point P in the first circuit of the filter such that the point is connected to the other input terminal both through elements coupled to the second circuit of the filter and through circuit elements which substantially determine the tuning of the circuit. Fig. 1 shows an aerial coupled to the first tuned circuit by capacity C3 and the mutual inductance L0, L1 and by capacity C4. Operation over two wave-bands may be obtained by the addition of loading coils and an additional coupling condenser which are short-circuited on the shorter wave-band, Fig. 3 (not shown). Fig. 2 shows a two wave-band arrangement involving less switches in which the tuned circuits are capacitatively coupled by condensers C<1>5, C<11>5 and a series coil L4 aids in the image frequency suppression.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL458655X | 1936-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB458655A true GB458655A (en) | 1936-12-23 |
Family
ID=19786365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15411/36A Expired GB458655A (en) | 1936-01-06 | 1936-06-02 | Improvements in or relating to superheterodyne receiving circuits |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2151814A (en) |
| BE (1) | BE415557A (en) |
| DE (1) | DE728416C (en) |
| FR (1) | FR806408A (en) |
| GB (1) | GB458655A (en) |
| NL (1) | NL45380C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL65133C (en) * | 1943-03-03 | |||
| US2545259A (en) * | 1946-10-05 | 1951-03-13 | Monmouth Lab Inc | Multiple radio heterodyne distribution system |
| US2752575A (en) * | 1953-03-04 | 1956-06-26 | Collins Radio Co | Rejection filter |
| US2855508A (en) * | 1954-03-22 | 1958-10-07 | Rca Corp | Dual frequency resonant circuits |
| US4571560A (en) * | 1985-05-21 | 1986-02-18 | Zenith Electronics Corporation | Switched bandpass filter |
-
0
- NL NL45380D patent/NL45380C/xx active
- BE BE415557D patent/BE415557A/xx unknown
-
1936
- 1936-05-06 DE DEN39440D patent/DE728416C/en not_active Expired
- 1936-05-15 FR FR806408D patent/FR806408A/en not_active Expired
- 1936-06-02 GB GB15411/36A patent/GB458655A/en not_active Expired
- 1936-12-31 US US118455A patent/US2151814A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| BE415557A (en) | |
| FR806408A (en) | 1936-12-16 |
| US2151814A (en) | 1939-03-28 |
| NL45380C (en) | |
| DE728416C (en) | 1942-11-26 |
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