GB774015A - Improvements in or relating to frequency changing mixing circuits - Google Patents
Improvements in or relating to frequency changing mixing circuitsInfo
- Publication number
- GB774015A GB774015A GB3158954A GB3158954A GB774015A GB 774015 A GB774015 A GB 774015A GB 3158954 A GB3158954 A GB 3158954A GB 3158954 A GB3158954 A GB 3158954A GB 774015 A GB774015 A GB 774015A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- input
- inductance
- capacity
- tap
- 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
-
- 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)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
774,015. Frequency-changing circuits. TELEFUNKEN GES. Nov. 2, 1954 [Nov. 2, 1953], No. 31589/54. Class 40(6) In a self-oscillating frequency-changer in which the output is back-coupled to the input by a oscillatory circuit 2 and coupling inductance 3 and the signal input circuit 4 is connected between earth and a tap on the input inductance 3, the end of which remote from the valve is earthed via a condenser 6 balancing the input capacity of the valve, the effect upon the input circuit of the anode-grid capacity is also balanced out. For this purpose the circuit 2 is provided with a capacity tap comprising condenser 7 and the anodeearth capacity of the valve if necessary, augmented by a further condenser 8. The tap is located in the same proportion as the tap on the input inductance 3, and the anode-grid capacity balanced by a condenser 9. The inductance of the circuit 2 is also tapped in the same proportion, the inductance 10 of the first I.F. circuit being connected to this point; it is tuned by the condensers 7, 8.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1953T0008592 DE933814C (en) | 1953-11-02 | 1953-11-02 | Self-oscillating mixer circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
GB774015A true GB774015A (en) | 1957-05-01 |
Family
ID=7545892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3158954A Expired GB774015A (en) | 1953-11-02 | 1954-11-02 | Improvements in or relating to frequency changing mixing circuits |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE933814C (en) |
GB (1) | GB774015A (en) |
-
1953
- 1953-11-02 DE DE1953T0008592 patent/DE933814C/en not_active Expired
-
1954
- 1954-11-02 GB GB3158954A patent/GB774015A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE933814C (en) | 1955-10-06 |
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