Which is the effective capacitance of the MOSFET?
Ciss is the effective input capacitance of the MOSFET as seen by the gate drive circuit. RG = Rg + Rgext and Ciss = Cgs + Cgd. Rewriting equation (9) with effective values of gate resistance and capacitance In most cases the parameter of importance is not the actual gate voltage but the time taken to reach it.
What is the effect of oxide thickness on gate capacitance?
A simulation-based study on the effect of oxide thickness in gate capacitance of various nanoscale devices such as single gate and double gate MOSFET, CNTFET, and NWFET has been presented in this section using nanoHUB tools [24].
What happens to the QC of a single gate MOSFET?
It can be observed that in single gate MOSFET as the oxide thickness goes down from 1.5 to 0.7 nm, the QC increases significantly as the gate voltage increases. This increment in QC is observed up to a gate voltage of 1 V.
How does variable gate resistance affect gate capacitance?
The variable gate resistance is a very intuitive method for gate capacitance voltage regulation so that a desirable switching trajectory can be achieved during the IGBT switching transition. This can be achieved by the output driver reconfiguration so that the equivalent gate resistance is changed for the fixed gate voltage supplies.
What does CISS and RG stand for in MOSFET?
RG is the effective total gate resistance defined as the sum of internal gate resistance R g of the MOSFET and any external resistance Rgext that is part of the gate drive circuitry. Ciss is the effective input capacitance of the MOSFET as seen by the gate drive circuit.
How is the switching time of a MOSFET affected?
The switching times of the MOSFET are affected not only by the parasitic elements, but also by the driving circuit. Under the conditions described above, it was assumed that the gate circuit does not limit the switching performance of the power MOSFET.