GB492146A - Improvements in or relating to devices for receiving modulated high-frequency oscillations - Google Patents
Improvements in or relating to devices for receiving modulated high-frequency oscillationsInfo
- Publication number
- GB492146A GB492146A GB7158/38A GB715838A GB492146A GB 492146 A GB492146 A GB 492146A GB 7158/38 A GB7158/38 A GB 7158/38A GB 715838 A GB715838 A GB 715838A GB 492146 A GB492146 A GB 492146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- voltage
- control
- march
- 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
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
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
492,146. Wireless receiving systems; impedance networks. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. March 7, 1938, No. 7158. Convention date, March 9, 1937. [Classes 40 (iii) and 40 (v)] In a motor-car receiver high-frequency interference from the ignition system is eliminated, and the harmful influence of the small capacity of the car aerial is compensated, by feeding the aerial pick-up voltage through a step-down transformer 2 and twin cable 10 to a coupling condenser 3 connected in series with the inductance 4 of a tuned circuit 5, and the voltage across the tuning condenser 6 is applied to the control grid of the valve 7. When automatic volume control is effected by applying a control voltage V2 through the resistance 11 to the grid of the valve 7, a condenser 12 prevents short-circuiting through the secondary of transformer 2, and the condenser 12 and resistance 11 form a smoothing circuit for the control voltage. If the cable has a high self-capacity the condenser 3 may be omitted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL492146X | 1937-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB492146A true GB492146A (en) | 1938-09-15 |
Family
ID=19786697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7158/38A Expired GB492146A (en) | 1937-03-09 | 1938-03-07 | Improvements in or relating to devices for receiving modulated high-frequency oscillations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB492146A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314300A2 (en) * | 1987-10-30 | 1989-05-03 | International Business Machines Corporation | Remote connection of a termination network |
-
1938
- 1938-03-07 GB GB7158/38A patent/GB492146A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314300A2 (en) * | 1987-10-30 | 1989-05-03 | International Business Machines Corporation | Remote connection of a termination network |
| EP0314300A3 (en) * | 1987-10-30 | 1991-04-03 | International Business Machines Corporation | Remote connection of a termination network |
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