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The donor concentration in a silicon sample at 300K is ND = 1.2 x 1015 cm-3. 1 x 1016 cm-3 acceptor atoms are added to form a compensated p-type semiconductor so that the Fermi level is 0.26 eV above the valence band edge. (a) Determine free electron and hole concentration. (b) Calculate the effective density of states at valence band, Nv. Given that ni = 1x1010 cm3 and kT = 0.026.
A system is described by the differential equation ty'(t)-8y(t)=x(t). Classify the system as to linearity, time-invariance and stability. Show that a system with exicitation x(t) and response y(t) described by y(t)=u(x(t)) is nonlinear, time invari..
The 4:1 multiplexer function has four data inputs A,B,C,D, two select control inputs S1,S0 and a single positive-logic output Z that operates as follows. When S1,S0 = 00 gates A to Z; S1,S0 = 01 gates B toZ; S1,S0 = 10 gates C to Z
A 6-bit A/D converter with a full-scale voltage of 20 V is to be employed in a binary PCM system. The input analog signal is adjusted to cover the range from zero to slightly under 20V, and the converter is connected for unipolar encoding.
Any causal signal x(t) having a Laplace transform with poles in the open-left s-plane (i.e., not including the jΩ axis) has, as we saw before, a region of convergence that includes the jΩ axis, and as such its Fourier transform can be found from i..
The standard method of representing negative numbers in the binary system is with 2's complement notation. Let's start by discussing why this is the case. What are the advantages and disadvantages of using this method to represent negative numbers
The density of gasoline is 0.72 grams per cubic centimeter. What is the mass in units of kilograms of a 5-gallon container filled completely with gasoline Ignore the mass of the container.
A Newton's ring apparatus is to be used to determine the radius of curvature of a lens (see the figure below and Problem 75). The radii of the nth and (n+16)th bright rings are measured and found to be 0.129 and 0.317 cm
a certain 11 v dry-cell battery completely discharged requires a current of 100 ma for 1.2 hr to completely recharge.
Write the VHDL assignment operator for the Y1 output of a BCD-to-binary encoder. Use Boolean operators, D0-D9 as the data inputs lines and Y0-Y2 for the outputs. Inputs and outputs are active-HIGH.
The command in AutoCAD can be a time-saver, particularly when you're working in an application where you want to move a door or windows within walls on a drawing and don't want to redraw the walls.
looking for a brief theory on touch voltage, step voltage and ground potential rise (GPR). Should include graphical representation and relevant equations to help in understanding.
A 100V dc series motor has an armature resistance of 0.2 ohm and field resistance of 0.25 ohm. The motor runs at a speed of 600 rev/min when the shaft torque is 27.14 Nm. Friction and windage losses at this speed are 300W.
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