GB375410A - Improvements in or relating to receiving apparatus for electric wave signals - Google Patents
Improvements in or relating to receiving apparatus for electric wave signalsInfo
- Publication number
- GB375410A GB375410A GB929031A GB929031A GB375410A GB 375410 A GB375410 A GB 375410A GB 929031 A GB929031 A GB 929031A GB 929031 A GB929031 A GB 929031A GB 375410 A GB375410 A GB 375410A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- receiver
- receiving apparatus
- ganged
- condenser
- 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)
- Circuits Of Receivers In General (AREA)
Abstract
375,410. Wireless receiving apparatus. ROBINSON, J. and BRITISH RADIOSTAT CORPORATION, Ltd., 29, George Street, Hanover Square, London. March 26, 1931, No. 9290. [Class 40 (v).] In a super-heterodyne receiver, second channel interference is prevented by an auxiliary circuit the tuning element of which is ganged to the tuning element of the receiver. The receiver may use a low intermediate frequency as described in Specification 357,647 in order to obtain high selectivity. Fig. 1 shows a receiver including a rejector circuit 21 in the aerial circuit in series with the input circuit 10. In a modification, Figs. 6 and 7 (not shown), the auxiliary circuit is connected to the valve input in parallel with the tuned circuit and so arranged that second channel interference in the two circuits is of equal and opposite phase. Means may be provided for the separate adjustment of one of the tuned circuits to obtain an accurate balance. Fig. 2 shows the construction of the ganged condenser, the rotor 27 being insulated by the bearing 28 and the member 29. The condenser is enclosed in a screening casing 25.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB929031A GB375410A (en) | 1931-03-26 | 1931-03-26 | Improvements in or relating to receiving apparatus for electric wave signals |
| FR734123D FR734123A (en) | 1931-03-26 | 1932-03-24 | Improvements to devices receiving signals by electric waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB929031A GB375410A (en) | 1931-03-26 | 1931-03-26 | Improvements in or relating to receiving apparatus for electric wave signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB375410A true GB375410A (en) | 1932-06-27 |
Family
ID=9869128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB929031A Expired GB375410A (en) | 1931-03-26 | 1931-03-26 | Improvements in or relating to receiving apparatus for electric wave signals |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR734123A (en) |
| GB (1) | GB375410A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3734082A1 (en) * | 1986-10-09 | 1988-04-21 | Toko Inc | TUNED HIGH FREQUENCY CIRCUIT |
-
1931
- 1931-03-26 GB GB929031A patent/GB375410A/en not_active Expired
-
1932
- 1932-03-24 FR FR734123D patent/FR734123A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3734082A1 (en) * | 1986-10-09 | 1988-04-21 | Toko Inc | TUNED HIGH FREQUENCY CIRCUIT |
Also Published As
| Publication number | Publication date |
|---|---|
| FR734123A (en) | 1932-10-17 |
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