GB404401A - Radio receiver - Google Patents
Radio receiverInfo
- Publication number
- GB404401A GB404401A GB25147/32A GB2514732A GB404401A GB 404401 A GB404401 A GB 404401A GB 25147/32 A GB25147/32 A GB 25147/32A GB 2514732 A GB2514732 A GB 2514732A GB 404401 A GB404401 A GB 404401A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- band
- wave
- coupled
- circuits
- 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)
- Geophysics And Detection Of Objects (AREA)
- Transmitters (AREA)
Abstract
404,401. Valve circuits for wireless reception ; impedance networks. HAZELTINE CORPORATION, 15, Exchange Place, Jersey City, New Jersey, U.S.A.-(Assignees of Johnson, J. K. ; Central Avenue, Hartsdale, and WHEELER, H. A. ; 18, Melbourne Road, Great Neck, both in New York, U.S.A.) Sept. 9, 1932, No. 25147. Convention date, May 25. [Classes 40 (iii) and 40 (v).] In a supersonic heterodyne receiver having a plurality of tuning circuits in cascade, image frequency interference is suppressed by an image frequency suppressing circuit which couples two circuits of the selecting system. The Figure shows a detector-oscillator 11 having a band-pass input with mixed coupling L4C5 operating on two wave bands controlled by switches S1-S3. The oscillator circuit C6L5 is coupled to the output through the circuit L7C8 on the higher wave-band and through the circuit L7L8C7 on the lower wave-band and is coupled to the circuit between the cathode of the valve 11 and earth. This circuit also includes resistance condenser combination R3 C11 and coil L13 which is coupled to the input so as to suppress the image frequency by opposing the energy of this frequency passing through the band-pass filter and operates on both wave-bands.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US404401XA | 1932-05-25 | 1932-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB404401A true GB404401A (en) | 1934-01-18 |
Family
ID=21910990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25147/32A Expired GB404401A (en) | 1932-05-25 | 1932-09-09 | Radio receiver |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE396460A (en) |
| DE (1) | DE678200C (en) |
| FR (1) | FR756082A (en) |
| GB (1) | GB404401A (en) |
| NL (1) | NL37632C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110096167A (en) * | 2019-05-10 | 2019-08-06 | 鲁伯特（北京）教育科技有限公司 | A kind of LC resonance circuit of time writer and the method for proposing high q-factor |
| CN111142131A (en) * | 2019-12-31 | 2020-05-12 | 西安航天华迅科技有限公司 | Beidou satellite receiver |
-
1932
- 1932-09-09 GB GB25147/32A patent/GB404401A/en not_active Expired
-
1933
- 1933-05-22 BE BE396460D patent/BE396460A/xx unknown
- 1933-05-23 NL NL65395A patent/NL37632C/xx active
- 1933-05-24 FR FR756082D patent/FR756082A/en not_active Expired
- 1933-05-25 DE DEH136340D patent/DE678200C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE678200C (en) | 1939-07-10 |
| NL37632C (en) | 1936-03-16 |
| BE396460A (en) | 1933-06-30 |
| FR756082A (en) | 1933-12-04 |
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