Justify. Power MOSFET is operated at high enough gate source voltage to minimize the conduction losses. 

1 Answer

 

MOSFET is metal oxide field effect transistor. MOSFET is a voltage controlled device. MOSFET is majority carrier device. MOSFET are of two one is n-channel MOSFET and p-channel MOSFET. Gate, drain, and source are the three terminals of MOSFET. The current flows from drain to source when the voltage is applied between gate to the source terminal. The current between gate to source is very small. The active region, cutoff region, and ohmic region are the three regions in MOSFET. MOSFET goes in an ohmic region when the gate to source voltage is larger and drain to source voltage is small.

image


The ohmic region is also called as triode region. In the ohmic region, the MOSFET behaves like a small voltage controlled resistor. In the ohmic region, power dissipation is kept low by minimizing drain to source voltage even if the drain to source voltage is fairly large. Hence, power MOSFET is operated at high enough gate-source voltage to minimize the conduction losses.

Like 0 like

Related

Description : Explain MOSFET gate drive circuit and totem pole configuration.

Description :  An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when A) ZL = R B) ZL = jXS C) ZL = R-jXS D) ZL = R+jXS 

Description : Find power delivered by voltage source

Description : In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals

Description : The threshold voltage of an n- channel enhancement mode MOSFET is 0.5V when the device is biased at a gate voltage of 3V. Pinch off would be occurs at a drain voltage of (A) 1.5V (B) 2.5V (C) 3.5V (D) 4.5V

Ask a QuestionQuestions ← Prev Page Next Page →