BALANCED MODULATOR


Posted on Feb 5, 2014

When the carrier level is adequate to switch the cross-coupled pair of differential amplifiers, the modulation signal, which has been applied to the gate, will be switched at the carrier rate, between the collector loads. When switching occurs, it will result in the modulation being multiplied by a symmetrical switching function. If the modulation


BALANCED MODULATOR
Click here to download the full size of the above Circuit.

gate remains in the linear region, only the first harmonic will be present. To balance the MC1445 modulator, equal gain must be achieved in the two separate channels. To remain in the linear region, the modulation input must be restricted to approximately 200 mV pk-pk. Because the gate bias point is sensitive to the amount of carrier suppression, a high-resolution, 10-turn potentiometer should be used.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Simple continuity tester
    Two-terminal-touch-switch
    Charger Extends Lead-Acid Battery Life
    Enhance Synchronous-Rectification Control In Flyback Converters
    Unipolar Stepper Motor Controllers
    LB1948M motor control driver electronic circuit design
    Arduino Projects
    Homemade subwoofer playback system 01
    DC-coupled single-tube amplifier
    Discharge time relay circuit



    Top