grid modulation वाक्य

Early Continental Electronics designs, by James O . Weldon and others, retained most of the characteristics of Doherty's amplifier but added medium-level screen-grid modulation of the driver ( 317B, et al . ).
He also conducted research on ultra-short waves, electronics, and piezoelectric devices, and invented important modulation systems including the constant potential system, the grid modulation system, the rectifier modulation system used in carrier telephony, and the constant-current or Heising modulation system, which was standard on most early radio telephone transceivers.