The pressure zone system of frequency-modulated wave passband

The pressure zone system of frequency-modulated wave passband

  • CN 1,046,422 A
  • Filed: 04/08/1989
  • Published: 10/24/1990
  • Est. Priority Date: 04/08/1989
  • Status: Abandoned Application
First Claim
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1. , be added in the radio checking station, before the emission system power-amplifier stage, compress the system and device of passband, this device is made up of:

  • amplification, frequency division, three parts of filtering, it is characterized in that;

    The voltage magnitude that a, amplification output are described by sine curve, be that of pressing of frequency divider switch door gives and decides multiple, computational methods;

    70.7 times of percentages (this value can be looked into the Bessel function table) divided by the relative voltage amplitude of the highest number number side wave in the incoming wave passbandB, this system have;

    amplification, frequency division, three parts of filtering, amplifier section has several grades of amplifiers, high-frequency fm signal is amplified, and the part of waveform is amplified, frequency division partly by being made up of several grades of two-dividers of two divided-frequency ability, be made up of the resonant tank that the LC element constitutes by filter circuit.

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