In which of following region of MOSFET the drain to source current becomes constant?Asaturation regionBcut off regionCohmic regionSubmit Answer

In which region, MOSFET acts as an amplifier?

Transconductance of MOSFET in triode region is given by

when the gate terminal is connected to Positive and source terminal is connected to negative terminal, then the MOSFET is in _______________ modeAenhancement modeBcant sayCnoneSubmit Answer

8.2.1 The Basic MOSFET Current SourceFigure 8.1 shows the circuit of a simple MOS constant-current source. The heart of the circuitis transistor Q1 , the drain of which is shorted to its gate, 1 thereby forcing it to operate in thesaturation mode withID1 = 12 k′n( WL)1(V GS − Vtn)2 (8.1)where we have neglected channel-length modulation. The drain current of Q1 is supplied byVDD through resistor R, which in most cases would be outside the IC chip. Since the gatecurrents are zero,I D1 = IREF = VDD − VGSR (8.2)where the current through R is considered to be the reference current of the current source andis denoted IREF . Equations (8.1) and (8.2) can be used to determine the value required for R.Now consider transistor Q2 : It has the same VGS as Q1 ; thus, if we assume that it is operatingin saturation, its drain current, which is the output current IO of the current source, will beIO = ID2 = 12 k′n( WL)2(V GS −Vtn)2 (8.3)where we have neglected channel-length modulation. Equations (8.1) and (8.3) enable us torelate the output current IO to the reference current IREF as follows:I OIREF= (W/L)2(W/L)1

when the gate terminal is connected to Positive and source terminal is connected to negative terminal, then the MOSFET is in _______________ modeAenhancement modeBcant sayCnone