GB357647A - Improvements in or relating to wave signalling systems - Google Patents
Improvements in or relating to wave signalling systemsInfo
- Publication number
- GB357647A GB357647A GB1972730A GB1972730A GB357647A GB 357647 A GB357647 A GB 357647A GB 1972730 A GB1972730 A GB 1972730A GB 1972730 A GB1972730 A GB 1972730A GB 357647 A GB357647 A GB 357647A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- amplifier
- selectivity
- intermediate frequency
- valve
- 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
- 230000011664 signaling Effects 0.000 title 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
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
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
357,647. Valve amplifying and detecting circuits. ROBINSON, J., 29, George Street, Hanover Square, London. June 28, 1930, No. 19727. [Class 40 (v).] In a supersonic heterodyne receiver the intermediate frequency used is so low that the high order of selectivity set forth in Specification 344,869 is obtained and means are provided to correct for the distortion due to the high selectivity. The Figure shows a receiver comprising a high frequency amplifying valve V, detector valves V2, V5, and couplings L5 C8, L7CII, L9 C13 for the intermediate frequency amplifier arranged to give the required selectivity. Correction is effected in the input circuit of low frequency amplifying valve V6, by resistance condenser combination R6 R7 C17. The intermediate frequency is preferably of the order of 20000 cycles and numerical data for the components used for an amplifier at this frequency are given in the Specification. The correction may be effected in steps throughout the amplifier and by modifying the transformer T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1972730A GB357647A (en) | 1930-06-28 | 1930-06-28 | Improvements in or relating to wave signalling systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1972730A GB357647A (en) | 1930-06-28 | 1930-06-28 | Improvements in or relating to wave signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB357647A true GB357647A (en) | 1931-09-28 |
Family
ID=10134195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1972730A Expired GB357647A (en) | 1930-06-28 | 1930-06-28 | Improvements in or relating to wave signalling systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB357647A (en) |
-
1930
- 1930-06-28 GB GB1972730A patent/GB357647A/en not_active Expired
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