GB301498A - Improvements in and relating to radio receiving apparatus - Google Patents
Improvements in and relating to radio receiving apparatusInfo
- Publication number
- GB301498A GB301498A GB34273/28A GB3427328A GB301498A GB 301498 A GB301498 A GB 301498A GB 34273/28 A GB34273/28 A GB 34273/28A GB 3427328 A GB3427328 A GB 3427328A GB 301498 A GB301498 A GB 301498A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aperiodic
- oscillator
- frequency
- circuit
- semi
- 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
- H03D7/18—Modifications of frequency-changers for eliminating image frequencies
Abstract
301,498. Kramolin, L. L. de. Dec. 1, 1927, [Convention date]. Thermionic heterodyne receivers; undesired signals, eliminating.-A supersonic heterodyne wireless receiver comprises an aperiodic signalinput circuit a combined with a tuned localoscillator circuit b to obtain a single tuning control. The oscillator is coupled with the aerial a through an aperiodic or semi-aperiodic amplifier c. The intermediate frequency is so chosen that disturbing frequencies, which produce the same intermediate frequency as the desired frequency with the local-oscillator frequency, lie outside the desired range of reception and are eliminated by filters d. The intermediate - frequency amplifier e is made selective and sensitive. According to modifications, a rejector circuit operated by the oscillator control is used in place of the filter (Fig. 2, not shown); two stages of semi-aperiodic (Fig. 3, not shown) or aperiodic amplification are used before the oscillator (Fig. 4, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE301498X | 1927-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB301498A true GB301498A (en) | 1930-02-21 |
Family
ID=6100405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34273/28A Expired GB301498A (en) | 1927-12-01 | 1928-11-21 | Improvements in and relating to radio receiving apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB301498A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE751089C (en) * | 1935-10-31 | 1952-11-24 | Georg Von Schaub | Overlay receiver with a high intermediate frequency and an overlaying overlay fundamental frequency |
-
1928
- 1928-11-21 GB GB34273/28A patent/GB301498A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE751089C (en) * | 1935-10-31 | 1952-11-24 | Georg Von Schaub | Overlay receiver with a high intermediate frequency and an overlaying overlay fundamental frequency |
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