preethi19
Full Member level 5
Hi could anyone pls tell me the difference between enhanced and depletion MOSFET. Saw some posts. I found this
"Enhancements Mosfet's have a channel already between the Drain and Source, so adding a gate voltage of either positive or negative polarity, controls its conductivity. This allows us to use a signal of both polarities without having to worry about the MOSFET cutting off
While in Depletiong MOSFET the channel needs to be created, and that is done by adding a DC voltage to the Gate, untill the condition of "Inversion" is reached and the channel is formed. This restricts us to use only signals of one polarity to maintain the MOSFET operating and avoid the cut-off condition"
What does it mean by enhanced MOS has already a channel. We form the channel for E-MOS by applying gate voltage right which seems to be same as D-MOS where a channel needs to be created. Also what does it mean in EMOS we can use signals of both polarity? I only worked with EMOS so we first apply the VGS to overcome the threshold voltage VTH and which enables us to have positive current flow from drain to source. How can we use both polarities signal?? Isnt it as straightforward as that. Pls help!!!
"Enhancements Mosfet's have a channel already between the Drain and Source, so adding a gate voltage of either positive or negative polarity, controls its conductivity. This allows us to use a signal of both polarities without having to worry about the MOSFET cutting off
While in Depletiong MOSFET the channel needs to be created, and that is done by adding a DC voltage to the Gate, untill the condition of "Inversion" is reached and the channel is formed. This restricts us to use only signals of one polarity to maintain the MOSFET operating and avoid the cut-off condition"
What does it mean by enhanced MOS has already a channel. We form the channel for E-MOS by applying gate voltage right which seems to be same as D-MOS where a channel needs to be created. Also what does it mean in EMOS we can use signals of both polarity? I only worked with EMOS so we first apply the VGS to overcome the threshold voltage VTH and which enables us to have positive current flow from drain to source. How can we use both polarities signal?? Isnt it as straightforward as that. Pls help!!!