GB1011387A - Improvements in or relating to frequency modulated carrier wave receivers - Google Patents

Improvements in or relating to frequency modulated carrier wave receivers

Info

Publication number
GB1011387A
GB1011387A GB3273064A GB3273064A GB1011387A GB 1011387 A GB1011387 A GB 1011387A GB 3273064 A GB3273064 A GB 3273064A GB 3273064 A GB3273064 A GB 3273064A GB 1011387 A GB1011387 A GB 1011387A
Authority
GB
United Kingdom
Prior art keywords
amplifier
receiver
relating
carrier wave
frequency
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
GB3273064A
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 Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
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 Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1011387A publication Critical patent/GB1011387A/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
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems

Landscapes

  • Noise Elimination (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

1,011,387. Muting circuits. TELEFUNKEN PATENTVERWENTUNGSGESELLSCHAFT. Aug. 11, 1964 [Aug. 30, 1963], No. 32730/64. Heading H3Q. A frequency-modulation receiver includes a frequency-selective amplifier 8, i.e. tuned to a supersonic frequency which is back-coupled over a path 12 so as to be self-oscillatory. The amplifier 8 is also connected in a countercoupling path comprising phase-shifter 11 modulating the local oscillator 4 of the receiver and thence the mixer 3, I.F. amplifier 5 and discriminator 6 so that when a signal is received and the receiver correctly tuned self-oscillator of amplifier 8 is inhibited. The oscillations from this amplifier are applied to means 9 muting the receiver. Specification 988,507 is referred to.
GB3273064A 1963-08-30 1964-08-11 Improvements in or relating to frequency modulated carrier wave receivers Expired GB1011387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET24609A DE1207458B (en) 1963-08-30 1963-08-30 Device for obtaining a switching voltage that is dependent on the input signal in an FM overlay receiver, in particular a squelch

Publications (1)

Publication Number Publication Date
GB1011387A true GB1011387A (en) 1965-11-24

Family

ID=7551551

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3273064A Expired GB1011387A (en) 1963-08-30 1964-08-11 Improvements in or relating to frequency modulated carrier wave receivers

Country Status (2)

Country Link
DE (1) DE1207458B (en)
GB (1) GB1011387A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596184A (en) * 1969-08-15 1971-07-27 Motorola Inc Squelch circuit with squelch tail elimination

Also Published As

Publication number Publication date
DE1207458B (en) 1965-12-23

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