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Can VGS be greater than VDS?
If MOSFET is fully on then VS=VD (assuming very low RDSon and thus low voltage drop). AS a side note, if you use N Channel MOSFET in low side configuration then VDS can be more than VGS with no problem since it’s VGS that determines how much MOSFET is on. For example VDS of 20V with a VGS of 10V.
What is VDS and VGS?
VDS represents MOSFET absolute maximum voltage between Drain and Source. In operations, voltage stress of Drain-Source should not exceed maximum rated value. 1.2 Gate-Source Voltage ( VGS ) VGS represents operating driver voltage between Gate and Source.
What VGS off?
VGS,off is the Cutoff Voltage of a FET transistor, which is the voltage necessary to turn the transistor off. At this voltage, the transistor enters the cutoff region. The cutoff voltage is referred to as VGS,off, because it is the voltage which must be applied to the gate-source terminal to turn off the transistor.
What is the relationship between VDS and VGS?
The flat region above 4V shows where the transistor is largely saturated, and the 1K resistor is doing all the current limiting it can…meaning 10mA off of a 10V supply. You can see this approximate point on the FET curves where Vgs reaches a level where Id>10mA.
How does the relationship between VGs and VGS-MOSFET work?
Linear (Vgs > Vt and Vds < Vgs – Vt) — Current flows from drain to source. The amount of current is roughly proportional to both Vgs and Vds. The MOSFET acts like a voltage-controlled resistor. This region is used for switching. Saturation (Vgs > Vt and Vds > Vgs – Vt) — current flows from drain to source.
How much current does a VGS need to run?
In your circuit, R1 limits your drain current to about 1 milliamp, which is pretty small. It looks like it only takes a Vgs about half a volt above Vt to get that much current.
What does steep drop off in VDS stand for?
The steep dropoff is the region where the transistor is conducting with a resistance comparable to your divider. The flat region above 4V shows where the transistor is largely saturated, and the 1K resistor is doing all the current limiting it can…meaning 10mA off of a 10V supply.