GB409756A - Improvements in or relating to super-heterodyne radio receivers - Google Patents
Improvements in or relating to super-heterodyne radio receiversInfo
- Publication number
- GB409756A GB409756A GB2883/34A GB288334A GB409756A GB 409756 A GB409756 A GB 409756A GB 2883/34 A GB2883/34 A GB 2883/34A GB 288334 A GB288334 A GB 288334A GB 409756 A GB409756 A GB 409756A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- oscillations
- electron path
- rectification
- oct
- 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
- H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
- H03D7/08—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between the same two electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superheterodyne Receivers (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
409,756. Valve circuits for wireless reception. KRAMOLIN, L. L. DE, 52, Babelsbergerstrasse, Wilmersdorf, Berlin. Oct. 5, 1932, No. 2883/34. Convention date, Oct. 6, 1931. Divided on 409,737. [Class 40) v).] In a superheterodyne receiver, the incoming signals are applied to a grid M controlling one electron path adjusted to operate without rectification and in series with a second electron path controlled by a grid 0 to which the local oscillations are applied. The grid O is coupled to the anode A over a condenser R, to generate oscillations at a frequency determined by the tuned circuit LC and the voltage on grid 0 is so high that ,oscillations of the form shown in Fig. 2 are produced, interrupting the incoming signals to produce the intermediate frequency across inductance Z. By operating the first electron path without rectification, interference due to two carrier frequencies beating at the intermediate frequency is eliminated. Specifications 172,350, 301,498, 312,698, 313,414, [all in Class 40 (v)], are referred to. According to the Specification as open to inspection under Sect. 91, the oscillations may be generated by a separate valve. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE409756X | 1931-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB409756A true GB409756A (en) | 1934-05-07 |
Family
ID=6422460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2883/34A Expired GB409756A (en) | 1931-10-06 | 1932-10-05 | Improvements in or relating to super-heterodyne radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB409756A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2789213A (en) * | 1955-06-02 | 1957-04-16 | Zenith Radio Corp | Cascode amplifier-mixer with trap to prevent local oscillator in driven stage from affecting driving stage |
| US2811636A (en) * | 1954-07-26 | 1957-10-29 | Rca Corp | Frequency converter and local oscillator with series connected space current paths |
| US2894125A (en) * | 1955-05-25 | 1959-07-07 | Standard Coil Prod Co Inc | Cascode television tuner with stages having inter-related space discharge currents and common gain control |
-
1932
- 1932-10-05 GB GB2883/34A patent/GB409756A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2811636A (en) * | 1954-07-26 | 1957-10-29 | Rca Corp | Frequency converter and local oscillator with series connected space current paths |
| US2894125A (en) * | 1955-05-25 | 1959-07-07 | Standard Coil Prod Co Inc | Cascode television tuner with stages having inter-related space discharge currents and common gain control |
| US2789213A (en) * | 1955-06-02 | 1957-04-16 | Zenith Radio Corp | Cascode amplifier-mixer with trap to prevent local oscillator in driven stage from affecting driving stage |
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