Before revision: As we increase this voltage, VGS, beyond VTH, we are said to be then OVERDRIVING the gate by creating a stronger channel, hence the OVERDRIVE VOLTAGE (Called often Vov, Vod, or Von) is defined as (VGS − VTH)
After revision: As we increase this voltage, VGS, beyond VTH, we are said to be then overdriving the gate by creating a stronger channel, hence the overdrive (often called. Vov, Vod, or Von) is defined as (VGS − VTH)