GB258969A - Improvements in or relating to radio receiving apparatus comprising means for rejecting undesired signals - Google Patents
Improvements in or relating to radio receiving apparatus comprising means for rejecting undesired signalsInfo
- Publication number
- GB258969A GB258969A GB1763825A GB1763825A GB258969A GB 258969 A GB258969 A GB 258969A GB 1763825 A GB1763825 A GB 1763825A GB 1763825 A GB1763825 A GB 1763825A GB 258969 A GB258969 A GB 258969A
- Authority
- GB
- United Kingdom
- Prior art keywords
- undesired signals
- circuit
- frequency
- relating
- receiving apparatus
- 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
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
Abstract
258,969. Igranic Electric Co., Ltd., and Willans, P. W. July 9, 1925. Undesired signals, eliminating or limiting.-A rejector circuit 1, 2, tuned to the interfering frequency, is inserted in the grid of the low-frequency amplifying valve Vl, and is back-coupled to a reaction coil 3 to reduce its effective resistance, whilst at the same time it is coupled to the aerial tuning inductance 4 so as to increase the aerial impedance to the undesired signals. A condenser 5 is shunted across the secondary of the transformer to complete the grid circuit for high-frequency currents necessary to maintain the reaction effect on the circuit 1, 2. The valve Vl therefore functions not only to reduce the effective resistance of the rejector circuit but also in the normal manner of a note magnifier. In a supersonic receiver an intermediate or low-frequency amplifying valve may be used in like manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1763825A GB258969A (en) | 1925-07-09 | 1925-07-09 | Improvements in or relating to radio receiving apparatus comprising means for rejecting undesired signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1763825A GB258969A (en) | 1925-07-09 | 1925-07-09 | Improvements in or relating to radio receiving apparatus comprising means for rejecting undesired signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB258969A true GB258969A (en) | 1926-10-07 |
Family
ID=10098620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1763825A Expired GB258969A (en) | 1925-07-09 | 1925-07-09 | Improvements in or relating to radio receiving apparatus comprising means for rejecting undesired signals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB258969A (en) |
-
1925
- 1925-07-09 GB GB1763825A patent/GB258969A/en not_active Expired
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