GB774015A - Improvements in or relating to frequency changing mixing circuits - Google Patents

Improvements in or relating to frequency changing mixing circuits

Info

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
Application number
GB3158954A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefunken AG filed Critical Telefunken AG
Publication of GB774015A publication Critical patent/GB774015A/en
Expired legal-status Critical Current

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.
GB3158954A 1953-11-02 1954-11-02 Improvements in or relating to frequency changing mixing circuits Expired GB774015A (en)

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)

Also Published As

Publication number Publication date
DE933814C (en) 1955-10-06

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