Afield transistor with a structure similar has na = 2x10^17cm-3 , qf/q =2x10^11 cm-2 and an n+ poly-si local interconnect as the gate electrode. if the requirement for sufficient isolation between the field device and well is vt ≥ 20v, calculate the minimum field oxide thickness. assume that fermi level of n+ polysilicon coincides with ec.

(b) a mosfet has a threshold voltage of vt = 0.6v, a subthreshold swing of 90 mv/decade and a drain current of 0.1μa at vt. what is the sub-threshold leakage current at vg = 0v?

(c) for the device in problem 5(b), calculate the reverse substrate voltage required in order to decrease the sub-threshold leakage current by one order of magnitude or one decade. na=3x10^17cm-3 , d= 6 nm. hint: every one decade decrease of sub-vt leakage current => 90 mv increase in vt => δvt=90 mv or 0.09v [for problem 5(b)].

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?