Is bias a secondary source?
Bias is not a secondary source. In terms of historical and academic research and writing, secondary sources are articles and books written by historians and other academics. Secondary sources can be biased based on when the source was written and the author.Ê
Secondary sources interpret the primary for you, so they generally contain less raw data and more bias. In addition, because you're getting the information second-hand, you are more likely to get something wrong, because you're relying on the assumption that you understand the secondary source and that the secondary source understood the first.
With the E-MOSFET, VGS has to be, 'greater than VGS(th) to get any drain current at all. Therefore, when E-MOSFETs are biased, self-bias, current-source bias, and zero bias cannot be used because these forms of bias depend on the depletion mode of operation. This leaves gate bias, voltage-divider bias, and source bias as the means for biasing E-MOSFETs.