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The document discusses different types of field effect transistors (FETs), including metal-oxide-semiconductor FETs (MOSFETs). It covers enhancement mode and depletion mode MOSFETs, describing N-channel and P-channel varieties of each. The key characteristics and biases of MOSFETs are discussed, such as forward and reverse biases. Drain characteristics curves of enhancement mode MOSFETs are also mentioned.Read less