GB674798A - Improvements in or relating to double channel radio receivers - Google Patents
Improvements in or relating to double channel radio receiversInfo
- Publication number
- GB674798A GB674798A GB22059/50A GB2205950A GB674798A GB 674798 A GB674798 A GB 674798A GB 22059/50 A GB22059/50 A GB 22059/50A GB 2205950 A GB2205950 A GB 2205950A GB 674798 A GB674798 A GB 674798A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- circuits
- sept
- synchronize
- relating
- 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
- H03D11/00—Super-regenerative demodulator circuits
- H03D11/02—Super-regenerative demodulator circuits for amplitude-modulated oscillations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Television Receiver Circuits (AREA)
Abstract
674,798. Multiplex radio signaling; superregenerative receivers. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 7, 1950 [Sept. 10, 1949], No. 22059/50. Class 40 (v). A two-channel receiver, particularly for sound and vision modulated carriers, comprises two self-quenching super-regenerative detectors, which synchronize each other. The valves 1, 2 are connected as Hartley oscillators with tuned circuits 3, 3<SP>1</SP> respectively coupled to two aerials or a single aerial, and quenched by the operation of grid condensers 6, 6<SP>1</SP> and resistances 5, 5<SP>1</SP>, respectively. Coils 8, 8<SP>1</SP> in their cathode circuits are mutually coupled, so that a voltage variation at one cathode produces a voltage variation of opposite polarity at the other cathode to synchronize the two quenching frequencies. The two demodulated signals are derived from filters 9, 10, respectively, in the individual anode circuits.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL284966X | 1949-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB674798A true GB674798A (en) | 1952-07-02 |
Family
ID=19782470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22059/50A Expired GB674798A (en) | 1949-09-10 | 1950-09-07 | Improvements in or relating to double channel radio receivers |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE498002A (en) |
| CH (1) | CH284966A (en) |
| DE (1) | DE831272C (en) |
| FR (1) | FR1024422A (en) |
| GB (1) | GB674798A (en) |
| NL (1) | NL148625B (en) |
-
0
- NL NL727208005A patent/NL148625B/en unknown
- BE BE498002D patent/BE498002A/xx unknown
-
1950
- 1950-09-07 GB GB22059/50A patent/GB674798A/en not_active Expired
- 1950-09-07 DE DEN1807A patent/DE831272C/en not_active Expired
- 1950-09-08 CH CH284966D patent/CH284966A/en unknown
- 1950-09-08 FR FR1024422D patent/FR1024422A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1024422A (en) | 1953-04-01 |
| DE831272C (en) | 1952-02-11 |
| CH284966A (en) | 1952-08-15 |
| BE498002A (en) | |
| NL148625B (en) |
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