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1. One simplified model of a forward conducting Silicon diode's behaviour is to consider the diode to be equivalent to a series combination of a low resistance, a 0.7V fixed voltage source, and an ideal diode. Explain how this model is a reasonable approximation in terms of the true I-V relationship for a practical diode. What impact does the operating environment have on the true I-V relationship, and how can we account for this effect in the model? Describe the practical application of this environmental effect.
2. What effect do internal capacitances in the transistor model have on practical performance of a real system? How would you use these model values to predict system performance?
3. How are mutual transconductance, β and α of a BJT transistor related to each other? What role do these parameters play in circuit design?
4. Describe the operation of a current mirror and illustrate how one might be used.
A half wave dipole antenna is operating in air at a frequency of 100 MHz. At a distance of 1000 km and at an observation point ? = ?/2, electric field strength is measured to be 5 µV/m. Calculate the a. Length of the antenna
Derive a sequential circuit with one input (w) and one output (z) using D flip flops that detects an input sequence of 101. Use a Moore model, and show all of your work including the state machine, state table, state assignment, state assignment t..
The line voltage and current delivered to a balanced 3-phaseWye- connected resistive load bank is measured and found tobe 415 V and 30 A respectively. 1) What is the value of voltage across on phase of the loadbank
Using a voltage source Vdd=2.5V and an MOSFET with Vt=0.5 V, Kn'=0.8 A/V^2, W=10um and lambda=0, build a common source amplifier which drives a load resistor of 10k ohms. The input signal to the amplifier is a sine wave with a peak value of 0.15 V..
Two loads connected in parallel are supplied from a single-phase 240-V rms source. The two loads draw a total real power of 400kw at a power factor 0f 0.8 lagging. One of the loads draws 120kW at a power factor of 0.96 leading. Find the complex po..
Design a 2-bit counter that, when f = 1, counts in the repeating sequence: 0, 2, 3, and when f = 0, counts in the reverse direction. Use T flip-flops. (a) Construct a state diagram or state table.
What is the major difference between a bipolar and a unipolar device Which of the transistor currents is always the largest Which is always the smallest? Which two currents are relatively close in magnitude
Given that the number of charges measured at t1 is n1 = 2.20×10^19, and the number of charges measured at t2 is n2 = 7.15×10^19. Find the current flow if the time interval between t1 and t2 is 2 s.
The fiber has a loss of 0.25 dB/km, and there is a splice with a loss of 0.1 dB every km. The coupling loss at the receiver is 0.5 dB, and the receiver uses an InGaAs APD with a sensitivity of -39 dBm. Find the system margin.
A Rankine cycle power plant steam enters the turbine at 100psia and 800deg F.. Heat is rejected in the condeser at 80deg F. Isentropic sxpansion and compression occurs in the turbine and pump respectivel
At 0°C the circuit is balanced and at this temperature the RTD has a resistance of 200 W. Determine the change in output voltage for a 1°C change in temperature now assuming the meter has an internal impedance of 8,000 W.
write a subroutine in 68000 assembly language to add two 32-bit packed BCD numbers. BCD number 1 is stored at a location starting from $ 500000 through $ 500003, with the least significant digit at $ 500003 and the most significant digit.
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