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A Si p-n junction with a cross sectional area of 10^-4 cm^2 has the following properties at T=300 K: Dn=25cm^2/sec, Dp=10cm^2/sec, ni = 9.65x10^9cm^-3,tp = tn=5x10^-7sec, er =11.9
a) Design the diode such that the electron and hole diffusion currents are Jn=10A/cm2 and Jp = 1A/cm2 at forward bias voltage of 0.65V.
b) Consider that the operating temperature of the diode in part (a) is changed to 310K. Estimate the change in currents. (You need to consider here parameters that depend on temperature. Assume D and t are independent of T.)
c) The p-n junction in part (a) is used as a capacitor in an LC circuit to tune two WHRO stations in your car radio. When no voltage is applied a radio station transmitting at 89.5 MHz is received. What is the voltage required to get the classical music station at 90.3 MHz?
A positron (same mass as electron) moving at .8c collides head on with a stationary electron producing two photons with EQUAL ANGLES relative to the incoming positron. Find the photon energies, wavelengths and angle
Construct a sequential circuit with two data inputs, A and B and two data outputs X and Y whose sequential behavior is as follows: the machine accepts data on the two input lines synchronously with the clock.
The initial voltage across the capacitor is 5V and the initial current through the inductor is 100 mA. A switch is thrown at t=0 such that the circuit is connected in parallel with a 50 mA independent current source.
The project has been broken down into the following modules: Power supply Processor and motherboard with RAM I/O circuit board CD-ROM drive Floppy drive LCD display Keypad Enclosure and all mechanical parts Final assembly The total manufacturing c..
If a computing system needs two 32Kbytes to store its program and 16Kbytes to store temporary data, will a 16-bit address bus sufficient
The voltage V across a semi conductor in a computer is given by V= aI+BI^2, where I is the current (in A). If a 24 V battery is conducted across the semi conductor, find the current if a=4 ohms and B= 0.5 ohms/A.
A sphere of radius 100mm has a charge 4 C uniformly distributed throughout its volume. Find the magnitude of the electric field at distance 100.1 mm from the centre of the sphere.
Nitrogen at an absolute pressure of 689.5 kPa is used to fill a container having a volume of 0.002 m3. The filling process is very slow, and the gas in the container attains the ambient (room) temperature of 20°C. Determine the amount of gas in th..
find the complex exponential fourier series representation for a) x(t)=1 for t =1b) x(t)= t^2-1 for all t
Draw the logic diagram for the 4-bit circuit, using full adders and multiplexers. Determine the arithmetic operation performed for each of the four combinations of S and Cin: 00, 01, 10, and 11.
Assume that one of the pumps uses a1/4hp DC shunt motor with an input voltage of 115VDC that pulls 1.6A running at 1500 rpm. The filed resistance for the motor is 600 ohms and the armature resistance is 8.5 ohms.
Design a decade counter (negative edge-triggered counter) using flip flop circuit that can be used to perform binary counting. Show the timing diagram for the input and four outputs of the decade counter.
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