For an n-channel MOSFET, when vDS is held constant and vGS is increased beyond the threshold voltage, iD : (a) increases (b) does not change (c) decreases (ii) The MOSFET has small-signal parameters: gm = 20mS r0 = 10 kohm The open circuit voltage gain, Av0, is (a) -66.0 V/V (b) -200 V/V (c) -49.6 V/V (iii) The AC input resistance, Ri, of the amplifier in question (ii) is: (a) infinite (b) 15.95 kohm (c) 1.140 kohm (iv) The AC output resistance, R0, of the amplifier in question (ii) is: (a) 3.3 kohm (b) infinite (c) 2.48 kohm (v) The DC bias current, ID, of the amplifier in question (ii) is: (a) 2 mA (b) 20 mA (c) 50 mA
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