mean. n. 1. Something having a position, quality, or condition midway between extremes; a medium. 2. A number that typifies a set of numbers, such as a geometric mean or an arithmetic mean.he antilog of the mean of the logarithm of the calculated values, the same as the n th root of the product of the values. It is often a more useful mean for growth curves.
Threshold Voltage Threshold voltage, V, is defined as the minimum gate bias which can form a conducting channel between the source and drain. For power MOSFETs, it is usually measured at the drain-source current of 250uA. Gate oxide thickness and doping concentration of the channel can be used to control the V .
the voltage increases and the depletion region widens. Figure 7b shows that the MOSFET gate capacitance also increases when the VGS voltage increases past the threshold voltage (for low VDS values) because of the formation of an inversion layer of electrons in the MOS channel and an accumulation layer of electrons under the trench bottom. This