GB413724A - Improvements in or relating to superheterodyne wireless receiving sets - Google Patents
Improvements in or relating to superheterodyne wireless receiving setsInfo
- Publication number
- GB413724A GB413724A GB140133A GB140133A GB413724A GB 413724 A GB413724 A GB 413724A GB 140133 A GB140133 A GB 140133A GB 140133 A GB140133 A GB 140133A GB 413724 A GB413724 A GB 413724A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- inductance
- valve
- relating
- condenser
- 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
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
- H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
- H04B15/06—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder by local oscillators of receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
413,724. Valve circuits for wireless reception. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, McAINSH, N. J., and SHARP, S., c/o General Electric Co., Stoke, Coventry. Jan. 16, 1933, No. 1401. [Class 40 (v).] In a superheterodyne receiver, the circuit L2, C2 in which the local oscillations are generated is inductively coupled both to an inductance L3, connected between the cathode of the detector valve and one end of the tuned input circuit L1, C1, and to an inductance L4 connected in series with a condenser C4 across the circuit L1, C1. The impedance of the inductance L3 is small compared with the grid-cathode impedance C3 of the valve. A resistance may be connected in series, or parallel with the condenser C4 to adjust the power factor of the circuit L4, C4. The values of L3, C3, L4, C4 are so chosen that these form a balanced-bridge, the input circuit, L1, C2 constituting a diagonal of the bridge thus preventing radiation of the local oscillations. Reference has been directed by the Comptroller to U.S.A. Specification 1,820,809.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB140133A GB413724A (en) | 1933-01-16 | 1933-01-16 | Improvements in or relating to superheterodyne wireless receiving sets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB140133A GB413724A (en) | 1933-01-16 | 1933-01-16 | Improvements in or relating to superheterodyne wireless receiving sets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB413724A true GB413724A (en) | 1934-07-16 |
Family
ID=9721355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB140133A Expired GB413724A (en) | 1933-01-16 | 1933-01-16 | Improvements in or relating to superheterodyne wireless receiving sets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB413724A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2571041A (en) * | 1946-06-28 | 1951-10-09 | Rca Corp | Heterodyne detector circuit |
| US2794119A (en) * | 1953-09-30 | 1957-05-28 | Thomas P Dillon | Frequency converter |
-
1933
- 1933-01-16 GB GB140133A patent/GB413724A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2571041A (en) * | 1946-06-28 | 1951-10-09 | Rca Corp | Heterodyne detector circuit |
| US2794119A (en) * | 1953-09-30 | 1957-05-28 | Thomas P Dillon | Frequency converter |
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