Patents by Inventor Rafi Arakelian

Rafi Arakelian has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Narrow deviation voltage controlled crystal oscillator for mobile radio
    Patent number: 4134085
    Abstract: A linear sensitivity voltage controlled crystal oscillator of the type including a resonator coupled to a negative resistance generator. The resonator comprises a crystal connected in series with a voltage variable capacitance device. The response of the resonator is linearized by the addition of an inductance across the voltage variable capacitance device. A resistor is shunted across the crystal to prevent oscillation at spurious resonances of the resonator.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: January 9, 1979
    Inventors: Michael M. Driscoll, Rafi Arakelian
  • Low supply voltage frequency multiplier with common base transistor amplifier
    Patent number: 4130765
    Abstract: A frequency multiplier circuit utilizing a zero-crossing detector for producing a square wave at the frenquency of the input signal to generate harmonics of the input frequency. The square wave is filtered to generate a signal of a predetermined harmonic.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: December 19, 1978
    Inventors: Rafi Arakelian, Michael M. Driscoll