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1. MOS Band Diagrams. Consider four simple cases of the MOS capacitor, all combinations of low gate metal work function (e.g. Al qΦM ≈ 4.05 eV), high gate metal work function (e.g. Pt qΦM ≈ 5.15 eV), n+type silicon and p+type silicon substrate. Assume the substrate is highly doped, such that EF coincides with EC (n+) and EV (p+) respectively. ThConsider four simple cases of the MOS capacitor, all combinations of low gate metal work function (e.g. Al qΦM ≈ 4.05 eV), high gate metal work function (e.g. Pt qΦM ≈ 5.15 eV), n+type silicon and p+type silicon substrate. e SiO2 thickness is 2 nm. Please assume silicon electron affinity is qXS = 4.05 eV and band gap is EG = 1.1 eV.
(a) Sketch the four band diagrams across all MOS structures in equilibrium (VG = 0 V).
(b) Sketch the four band diagrams exactly at threshold (VG = VT), as the surface is inverted. Is the threshold voltage VT >0 or <0 in each case?
if we have a signal source impedance that is almost as high as the input impedance of the inverting Op Amp (Rin) what effect would that have. How much signal would appear at the inverting input of the Op Amp.
Control systems can be either open-loop or closed-loop
The cutoff frequencies of a series resonant circuit are 5400 Hz and 6000 Hz. a. Find the bandwidth of the circuit. b. If Qs is 9.5, find the resonant frequency of the circuit. c. If the resistance of the circuit is 2-ohm, find the value of X and XC a..
Sketch a graph of the drain-source current, IDS, as a function of drain-source voltage, VDS, for an enhancement-mode NMOS transistor with a threshold voltage of 1 V. On the same graph indicate how this curve would be shifted for a depletion-mode N..
A small circular parabolic reflector, often referred to as dish, is now being advertised as a TV antenna for direct broadcast. Assuming the diameter of the antenna is 1 meter, the frequency of operation is 3 GHz
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Complete the following table of flip-flop excitation values required to produce the indicated flip-flop state changes, where y indicates the present state and Y the desired next state of the flip-flop.
Determine the output voltage for an op-amp comparator circuit with a non-inverting input reference voltage of + 2 VDC and an inverting input signal of - 1 VDC. The op amp reaches output saturation voltages of ±13 V at the limits.
The dynamic resistance for rectifying junctions is given by Rdyn =(dI/dV)-1. For a junction diode having reverse saturation current I0=10-9A, Calculate Rdyn when the diode is biased at V=VF=0.7V, then V=VR=0.5V.
Research the recent history of gasoline pricing in your area, and attempt to relate any fluctuations you observe to documented supply and demand factors outlined in our book. Be sure to cite any references used.
What functions must the communications stations perform? Repeat for ring and star.
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