GB652306A - Improvements in superheterodyne receiving circuits - Google Patents
Improvements in superheterodyne receiving circuitsInfo
- Publication number
- GB652306A GB652306A GB8823/48A GB882348A GB652306A GB 652306 A GB652306 A GB 652306A GB 8823/48 A GB8823/48 A GB 8823/48A GB 882348 A GB882348 A GB 882348A GB 652306 A GB652306 A GB 652306A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- frequency
- tuned
- circuit
- grid
- 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
- H03D7/10—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 different pairs of electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superheterodyne Receivers (AREA)
Abstract
652,306. Superheterodyne circuits. PHILIPS ELECTRICAL, Ltd. March 25, 1948, No. 8823. Convention date, March 29, 1947. [Class 40 (v)] In a superhet receiver the high-frequency and intermediate frequency voltages are amplified in a single valve having two control grids to which the two voltages are respectively applied, the two output voltages being derived from the anode circuit. The incoming signal is applied to the first control grid 4 of valve 7 and the resulting output is fed through capacitor 25 to a signal frequency tuned circuit 12, 13 in the grid circuit of a frequency-changer valve 10. This valve has an anode-tuned circuit 22, 23 backcoupled through coil 14 to the grid to produce the local oscillations and the resulting intermediate frequency output is applied through tuned transformer 18, 19 to the second control grid of valve 5. A tuned anode transformer 8, 9 passes the amplified intermediate frequency to the succeeding stages of the receiver. The local oscillator preferably operates at a sub-harmonic of the desired beat frequency to avoid howling.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL266528X | 1947-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB652306A true GB652306A (en) | 1951-04-18 |
Family
ID=19781753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8823/48A Expired GB652306A (en) | 1947-03-29 | 1948-03-25 | Improvements in superheterodyne receiving circuits |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH266528A (en) |
| GB (1) | GB652306A (en) |
-
1948
- 1948-03-25 CH CH266528D patent/CH266528A/en unknown
- 1948-03-25 GB GB8823/48A patent/GB652306A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH266528A (en) | 1950-01-31 |
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