DK104578C - Balanceret frekvensdetektor. - Google Patents

Balanceret frekvensdetektor.

Info

Publication number
DK104578C
DK104578C DK166058AA DK166058A DK104578C DK 104578 C DK104578 C DK 104578C DK 166058A A DK166058A A DK 166058AA DK 166058 A DK166058 A DK 166058A DK 104578 C DK104578 C DK 104578C
Authority
DK
Denmark
Prior art keywords
frequency detector
balanced frequency
balanced
detector
frequency
Prior art date
Application number
DK166058AA
Other languages
English (en)
Original Assignee
Philips Nv
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 Nv filed Critical Philips Nv
Application granted granted Critical
Publication of DK104578C publication Critical patent/DK104578C/da

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
    • H04N5/126—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal indirectly commands a frequency generator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/06—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators
    • H03D3/14—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators by means of semiconductor devices having more than two electrodes
    • 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
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • 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
    • H03G3/344—Muting responsive to the amount of noise (noise squelch)

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
DK166058AA 1957-05-07 1958-05-03 Balanceret frekvensdetektor. DK104578C (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEN13618A DE1100722B (de) 1957-05-07 1957-05-07 Gegentakt-Frequenzdemodulator
DEN14809A DE1105922B (de) 1957-05-07 1958-03-15 Gegentakt-Frequenzdemodulator

Publications (1)

Publication Number Publication Date
DK104578C true DK104578C (da) 1966-06-06

Family

ID=25988600

Family Applications (1)

Application Number Title Priority Date Filing Date
DK166058AA DK104578C (da) 1957-05-07 1958-05-03 Balanceret frekvensdetektor.

Country Status (8)

Country Link
US (1) US3084291A (da)
BE (1) BE567409A (da)
CH (1) CH370442A (da)
DE (2) DE1100722B (da)
DK (1) DK104578C (da)
FR (1) FR1209098A (da)
GB (1) GB873254A (da)
NL (2) NL106705C (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508161A (en) * 1967-04-14 1970-04-21 Fairchild Camera Instr Co Semiconductor circuit for high gain amplification or fm quadrature detection
US3577008A (en) * 1969-01-22 1971-05-04 Rca Corp Automatic frequency control apparatus
US4127825A (en) * 1975-07-10 1978-11-28 Motorola, Inc. Linear frequency discriminator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457013A (en) * 1944-07-28 1948-12-21 Rca Corp Angle modulated wave discriminator
US2634369A (en) * 1947-06-26 1953-04-07 Standard Coil Prod Co Inc Detector for frequency modulation receivers
US2817756A (en) * 1952-06-03 1957-12-24 Charles A Debel Variable bandwidth constant peak-amplitude discriminator
BE524722A (da) * 1952-12-01
US2857517A (en) * 1957-06-14 1958-10-21 Gen Dynamics Corp Frequency discriminator

Also Published As

Publication number Publication date
FR1209098A (fr) 1960-02-29
GB873254A (en) 1961-07-19
CH370442A (de) 1963-07-15
DE1105922B (de) 1961-05-04
NL227462A (da)
DE1100722B (de) 1961-03-02
US3084291A (en) 1963-04-02
NL106705C (da)
BE567409A (da)

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