GB775612A - Improvements in or relating to radio receiving circuit arrangements for ultra high-frequency oscillations - Google Patents

Improvements in or relating to radio receiving circuit arrangements for ultra high-frequency oscillations

Info

Publication number
GB775612A
GB775612A GB8780/55A GB878055A GB775612A GB 775612 A GB775612 A GB 775612A GB 8780/55 A GB8780/55 A GB 8780/55A GB 878055 A GB878055 A GB 878055A GB 775612 A GB775612 A GB 775612A
Authority
GB
United Kingdom
Prior art keywords
grounded
grid
radio receiving
condenser
stage
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
GB8780/55A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB775612A publication Critical patent/GB775612A/en
Expired legal-status Critical Current

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

775,612. Radio receiving circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 25, 1955 [March 30, 1954], No. 8780/55. Class 40(6) In an ultra-short wave receiver a triode self-oscillating mixer 1 is followed by a grounded-grid LF. stage 2. The signal circuit 8 is connected .to an electrical centre-tap on the oscillator circuit 4, which is balanced by means of condenser 18. The mixer 1 is coupled to the grounded-grid I.F. stage 2 by means of a transformer 16, 19, the primary 16 of which is tuned by the feedback condenser 7 of the oscillator circuit. In a modification, Fig. 2 (not shown) the secondary 19 is also tuned, the earthing point of this circuit being at a tap on the coil so as to neutralize feedback in the grounded-grid stage 2. Feedback at intermediate frequency is provided by condenser 14 and resistor 17 and compensates not only for the output damping of the mixer 1 but also for the low input impedance of the grounded-grid I.F. amplifier 2.
GB8780/55A 1954-03-30 1955-03-25 Improvements in or relating to radio receiving circuit arrangements for ultra high-frequency oscillations Expired GB775612A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT775612X 1954-03-30

Publications (1)

Publication Number Publication Date
GB775612A true GB775612A (en) 1957-05-29

Family

ID=3680756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8780/55A Expired GB775612A (en) 1954-03-30 1955-03-25 Improvements in or relating to radio receiving circuit arrangements for ultra high-frequency oscillations

Country Status (2)

Country Link
GB (1) GB775612A (en)
NL (1) NL195743A (en)

Also Published As

Publication number Publication date
NL195743A (en)

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