GB751778A - A radio receiver for the selective reception of f.m. (u.s.w.) or a.m., in which the u.s.w. mixing is effected in a triode - Google Patents
A radio receiver for the selective reception of f.m. (u.s.w.) or a.m., in which the u.s.w. mixing is effected in a triodeInfo
- Publication number
- GB751778A GB751778A GB496554A GB496554A GB751778A GB 751778 A GB751778 A GB 751778A GB 496554 A GB496554 A GB 496554A GB 496554 A GB496554 A GB 496554A GB 751778 A GB751778 A GB 751778A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixer
- grid
- tuned
- triode
- circuit
- 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
- H04B1/26—Circuits for superheterodyne receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
751,778. Radio receiving circuits. STANDARD TELEPHONES & CABLES, Ltd. Feb. 19, 1954 [March 28, 1953], No. 4965/54. Classes 40 (5) and 40 (6). A multi-band receiver uses a self - oscillating triode as mixer on an ultra-short waveband (U.S.W.), whereas on lower frequencies a multiplicative mixer is used with the triode as local oscillator. In U.S.W. reception, the switches 9, 12, 12<SP>1</SP> being in the positions shown, signals from the tuned U.S.W. aerial coupling circuit 1 are applied to the grid of the mixer 5 via a capacitive tap C1, C2 on the reaction coil, which comprises a balanced bridge network. The valve is back-coupled to oscillate, via tuned circuit 6 and I.F. oscillations are taken from its anode circuit by means of a tuned transformer 8. They are applied to the grid of a high-slope pentode 11 operating as an I.F. amplifier. I.F. feedback is applied to the mixer 5 by back-coupling its anode and grid circuits via an U.S.W. choke 7. In reception on lower frequencies, the switches 9, 12, 12<SP>1</SP> are reversed. Signals from a tuned aerial coupling circuit 15 are then applied to the grid of the pentode 11 which now functions as mixer. The valve 5 is, back-coupled to act as oscillator, with sup. pressor-grid injection at the mixer 11.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DESCH12151A DE1000063B (en) | 1953-03-28 | 1953-03-28 | Switchable overlay receiver for the optional reception of frequency-modulated VHF oscillations or amplitude-modulated oscillations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB751778A true GB751778A (en) | 1956-07-04 |
Family
ID=7426696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB496554A Expired GB751778A (en) | 1953-03-28 | 1954-02-19 | A radio receiver for the selective reception of f.m. (u.s.w.) or a.m., in which the u.s.w. mixing is effected in a triode |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1000063B (en) |
| GB (1) | GB751778A (en) |
-
1953
- 1953-03-28 DE DESCH12151A patent/DE1000063B/en active Pending
-
1954
- 1954-02-19 GB GB496554A patent/GB751778A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1000063B (en) | 1957-01-03 |
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