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Questions -
Q1. A single phase voltage source inverter is controlled in a single pulse width modulated mode with a pulse width of 150o in each half circle. Total harmonic distortion is defined as
THD = (√(Vrms2- V12))/V1 * 100
Where V1 is the rms value of the fundamental component of the output voltage. The THD of output 'ac' voltage wave form is..
Q2. Find the voltage gain of the following op-amp network.
Q3. CE amplifier Problem - An amplifier ckt shown in fig where Vt = 25mV and β is very large
Voltage gain = Vo/Vs
Key Points -
1. re = Vt/((It)φ)
2. Av = (-Rl)/re (open loop)
3. Av = (-Rl)/RE (close loop)
4. Avs = Av (Ri)/(Ri+Rc)
Q5. Find the maximum power dissipation in the load.
Q6. In a single-phase full wave diode bridge rectifier, the diodes have a reverse recovery time if 40 μs. For an 'AC' input voltage of 230v, determine the effect of reverse recovery time on the average output foe a supply frequency of 50 Hz.
Draw a state transition diagram for a machine that solves this problem for any (arbitrarily long) value of N .
Draw a state transition diagram for a state machine that reads in a sequence of binary digits, one at a time, and stops when it has read in five 1s (need not be consecutive). To "stop" the machine, merely have it orbit in the state
Sketch a transistor-level schematic of F=(A+BC+DE)' and determine the relative sizing of all the transistors to equalize the rise/fall time.
A rectangular waveform has a 50% duty cycle (high for 1/2 acycle and low for 1/2 a cycle). It goes between two voltage levelsof -3 V (low) and +8 V (high), and has a period of100μs. a. Determine the Average voltage of this waveform.
What window function would you choose to truncate the ideal impulse response and why - compute an estimate of the required filter order (length). Justify your answer.
The input to a certain filter is given by Vin(t)=2cos(10000pi*t-15deg) and the steady state output is given by Vout(t)=5cos(10000pi*t+25deg). Determine the (complex) value of the transfer function of the filter for f=5000 Hz.
Find the transformation ratio of a transformer having 350 turns on the secondary winding and 7000 turns on the primary. What voltage must be applied to the primary of the transformer to develop an open-circuit secondary voltage
(a) determine the contact resistor that can go on the base if the length of the contact is 10 * Wb. (b) Plot the change in conductance in relation to varying the doping from 1014/cm3 to 1018/cm3 at room temperature. Redo the graph at 77K;
a modern transmits a 2 voltage signal into a channel. the channel adds to this signal a noise term that is drawn from
The output voltage of a certain OTA with a load resistance is determined to be 3.5 V. If its transconductance is and the input voltage is 100 mV, what is the value of the load resistance?
A plane wave is propagating along the z direction in a medium witha propagation coefficient (gamma) equal to (0.004+j2.5) a) What is the phase shift (in degrees) in the electric fieldfor two points along the z axis separated by 10 m.
Write a simulation that implements an MSK transmitter, AWGN channel, and matched filter receiver. Perform a Monte Carlo simulation for this system to determine the SNR.
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