castermopa.blogg.se

The more negative the gate, the less the drain current.

This creates a depletion region in the channel and, therefore, reduces the number of free electrons in the n channel, increases the channel resistance and reduces the drain current. This initiates recombination of holes and electrons.

negative with respect to the substrate, the gate repels some of the When - negative charge carriers out of the N-channel ,and attracts holes from the p type substrate. In this mode of operation gate attracts the charge carriers from the P-substrate to the N- channel and thus reduces the channel resistance which increases the drain- current. OPERATION OF N CHANNEL DEPLETION MOSFET A D-MOSFET may be biased to operate in two modes: the Depletion mode or the Enhancement mode When /GS and drain is made positive with respect to source current(in the form of free electrons) can flow between source and drain, even with zero gate potential and the MOSFET is said to be operating in Enhancement mode.