GB660546A - Improvements in or relating to mixing circuits for electric oscillations of high frequency - Google Patents
Improvements in or relating to mixing circuits for electric oscillations of high frequencyInfo
- Publication number
- GB660546A GB660546A GB30591/49A GB3059149A GB660546A GB 660546 A GB660546 A GB 660546A GB 30591/49 A GB30591/49 A GB 30591/49A GB 3059149 A GB3059149 A GB 3059149A GB 660546 A GB660546 A GB 660546A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- over
- relating
- high frequency
- band
- 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)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
660,546. Superheterodyne circuits. PHILIPS ELECTRICAL, Ltd. Nov. 29, 1949 [Dec. 2, 1948], No. 30591. Class 40 (v). In a frequency-changing circuit more particularly intended for short waves, the signal and local oscillations are both applied to the input circuit of a mixing valve 6 over a band-pass filter 4, 5 which is also coupled to the output circuit of the valve 6 by means of a reaction coil 7 so as to generate the local oscillations. The filter 4, 5 is over-coupled so that its frequency characteristic exhibits two peaks, one corresponding to the signal frequency and the other determining the oscillation frequency. Mixed inductive and capacitative coupling may be used between the two tuned circuits in order to keep the peak separation constant as the arrangement is tuned over a band.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL660546X | 1948-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB660546A true GB660546A (en) | 1951-11-07 |
Family
ID=19796377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30591/49A Expired GB660546A (en) | 1948-12-02 | 1949-11-29 | Improvements in or relating to mixing circuits for electric oscillations of high frequency |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE810519C (en) |
| FR (1) | FR1000471A (en) |
| GB (1) | GB660546A (en) |
| NL (1) | NL143618B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE972522C (en) * | 1951-12-04 | 1959-08-06 | Telefunken Gmbh | Mixing circuit for overlay receivers, especially for VHF reception |
-
0
- NL NL63298031A patent/NL143618B/en unknown
-
1949
- 1949-02-03 DE DEP33134A patent/DE810519C/en not_active Expired
- 1949-11-29 GB GB30591/49A patent/GB660546A/en not_active Expired
- 1949-11-30 FR FR1000471D patent/FR1000471A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1000471A (en) | 1952-02-12 |
| DE810519C (en) | 1951-08-09 |
| NL143618B (en) |
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