Classifications

• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
  • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
  • H03J7/02—Automatic frequency control
  • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
  • H03J7/042—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant with reactance tube
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03C—MODULATION
  • H03C3/00—Angle modulation
  • H03C3/02—Details
  • H03C3/09—Modifications of modulator for regulating the mean frequency
• • 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
  • H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
  • H03D3/003—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback
  • H03D3/004—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback wherein the demodulated signal is used for controlling an oscillator, e.g. the local oscillator
• • 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
  • H03D3/04—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by counting or integrating cycles of oscillations
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
  • H03L7/00—Automatic control of frequency or phase; Synchronisation
  • H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Oscillators With Electromechanical Resonators (AREA)
• Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
• Superheterodyne Receivers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=27040960

Family Applications (1)

Country Status (4)

Families Citing this family (19)

• 0
  • FR FR957645D patent/FR957645A/fr not_active Expired
• 1942
  • 1942-11-03 US US464380A patent/US2406309A/en not_active Expired - Lifetime
• 1943
  • 1943-03-10 US US478705A patent/US2383359A/en not_active Expired - Lifetime
• 1947
  • 1947-08-07 CH CH264774D patent/CH264774A/de unknown
• 1948
  • 1948-12-24 DE DEP26531D patent/DE821047C/de not_active Expired

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