Because for creating channal we need voltage at gate if there is no voltage at ate then VGS=0 this mean no amplificatiion can be done.
Can't Stand Greg
What GIS stand for in genetics
A stand with three legs called atripod
They stand alone. Forever alone.
VGS could stand for many things. Some of the more popular are Videregaende Skole, which is a school in Norway, and Virtual Game Station or Video Game System. Another very common one is Voodoo Glow Skulls, which is a ska band.
gm = d(ID)/d(VGS), where ID = drain current, and VGS = gate bias, with all other biases fixed and all biases referenced to the source voltage. gm is the measure of how much the drain current changes with an incremental change of VGS. Practically, you measure (ID, VGS) pairs at a fixed VDS for a range of VGS. Then gm at a certain (VGS=VGS1) is simply (ID2-ID1)/(VGS2-VGS1), where 1,2 signify consecutive pairs of (ID, VGS). In other words, you can plot ID versus VGS on an x-y plot with VGS being the x-axis. Whichever way you measure the slope at a certain (VGS=VGS1) on the curve is the gm value. Please note that gm for an MOSFET is the same in definition. =============================
Do you mean Vigoss? Yes, VGS are the version of Vigoss jeans once sold at J C Penney and are no longer available. You can find them on Ebay.
JcPenny
▪ A 2N5668 has VGS(off) = -4 v and IDSS = 5mA. What are gate voltage and drain current at the half cutoff point? ▪ A 2N5459 has VGS(off) = -8 v and IDSS = 16mA. What is the drain current at the half cutoff point?
Pinch off voltage is defined as the gate-to-source voltage at which drain-to-source current is zero.Proof:-(In the saturation region)IDS = IDSS [1- (VGS/VP)]2When IDS = O ,VGS = VP
To create the depletion layer required for JFET operation the gate-source junction must be reverse biased.for N channel, the channel must be positive relative to the gate meaning Vgs must be negativefor P channel, the channel must be negative relative to the gate meaning Vgs must be positive
To create the depletion layer required for JFET operation the gate-source junction must be reverse biased.for N channel, the channel must be positive relative to the gate meaning Vgs must be negativefor P channel, the channel must be negative relative to the gate meaning Vgs must be positive
Pinch off voltage is defined as the gate-to-source voltage at which drain-to-source current is zero.Proof:-(In the saturation region)IDS = IDSS [1- (VGS/VP)]2When IDS = O ,VGS = VP
by vgs 14
This refers to the voltage Vds that counteracts the opening of the n-channel (NMOS), at the drain end. Since the width of the channel is a function of Vgs - Vtn, the mosfet saturates (pinches off) when Vds is greater or equal than/to Vgs - Vtn.
They do in TN..so I'd say they would everywhere. you could call and ask.