GB710834A - Improvements in or relating to radio receivers - Google Patents

Improvements in or relating to radio receivers

Info

Publication number
GB710834A
GB710834A GB23237/52A GB2323752A GB710834A GB 710834 A GB710834 A GB 710834A GB 23237/52 A GB23237/52 A GB 23237/52A GB 2323752 A GB2323752 A GB 2323752A GB 710834 A GB710834 A GB 710834A
Authority
GB
United Kingdom
Prior art keywords
valve
fed
circuit
switch
reproducer
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
GB23237/52A
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 GB710834A publication Critical patent/GB710834A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D5/00—Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

710,834. Radio receiving circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept 16, 1952 [Sept. 19, 1951], No. 23237/52. Class 40 (5) In a receiver for two wavebands, for which separate low-frequency channels are provided, a potentiometer used as volume control in the one channel is switched so as to control the other channel also. For receiving frequency-modulation, a valve 3 acts as an I.F. amplifier being fed from circuit 1 and feeding a discriminator network 4 and valve 5, which is of the multigrid phase-detector type. Demodulated signals appearing in the anode circuit are fed over volume control 8 and switch 9 to output stages and reproducer 11. Amplitude modulated signals in another waveband are switched (by means not shown) to circuit 2 and are rectified by the diode portion of the valve 3. Demodulated signals appearing across the load resistance 14 are fed via resistances 17, 16, 15 to the grid of valve 3, which now functions as a low-frequency amplifier, the output being taken from the screen circuit and fed to output stages and reproducer 18. The devices 11, 18 may have part or all in common. The switch 9 is ganged to the waveband switch so that, on this band, the potentiometer 8 acts as a variable shunt across the resistor 16. Loss of higher audio frequencies caused by condenser 13 is compensated by means of a condenser 19.
GB23237/52A 1951-09-19 1952-09-16 Improvements in or relating to radio receivers Expired GB710834A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL710834X 1951-09-19

Publications (1)

Publication Number Publication Date
GB710834A true GB710834A (en) 1954-06-16

Family

ID=19813414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23237/52A Expired GB710834A (en) 1951-09-19 1952-09-16 Improvements in or relating to radio receivers

Country Status (1)

Country Link
GB (1) GB710834A (en)

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