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1. Determine the peak-to-peak current ripple in the output inductor for a forward converter and determine the output voltage ripple of the converter . We know the following parameters: duty cycle d, input voltage Vin, turn ratio: N1/N2, switching frequency fs, output inductance L, output capacitance C.?
2. For a push-pull converter discussed in the lecture, two switches and four windings (two primary-secondary pairs) are used. For a period of T, the first switch turns on for dT. After a deadtime, the second switch turns on for dT, followed by the same deadtime. In total, in the period T, there are two turn-on times for two switches, and two deadtimes. Now, we assume the two primary and the secondary windings are identical, having turn ratio of N1:N2. Derive the voltage conversion ratio (Vout/Vin)?
Consider a signal x(t) = 10 cos(2pi*fct + 4 cos 2pi*fmt). Assume frequency modulation. The message frequency fm = 2:3 kHz. Calculate the modulation index and find the bandwidth when.
In a typical mobile communications base station (or cell site), a radio frequency (RF) signal is amplified in the base station and then sent (over cable) to the antennas at the top of the tower.
Determine a suitable sampling frequency. Design a notch filter to remove the 50Hz component, paying particular attention to any assumptions you have made in the design.
Basics problems of Induction motor, The frequency of the induced rotor currents in the rotor of a 60 Hz induction, machine is 2 Hz. Furthermore, the fields in the air gap turn at -40 rpm with respect to the rotor.
write an 8051 program that would generate a 200khz, 50% duty cycle, square wave at P1.0.Use Timer 0 for the delay. Ignore the overheads cycles due to the instructions in the loop. Assume 12 MHz clock. All data must be hex.
What are the two possible frequencies to which the local oscillator could be set? What bandwidth should the 10.7 MHz IF amplifier have?
a) Describe the components and variables of the biological control apparatus involved in walking toward an object that can be seen on the horizon b) Why is walking a closed-loop operation
The Problem: An Electric Heater is connected to a constant 250-V source and absorbs 1000 W. Subsequently, this heater is connected to a constant 210 V source.
construct a vertical line on your I versus V graph at the point V=5V. this line will intersect each of the sloping lines at two separate points. explain the significance of these intersections.
The purpose of this project is to design a device that would remotely control (from a Bluetooth-enabled mobile phone for instance) at least two actuators (e.g. relays and switches).
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?
Determine the distribution of the number of customers waiting in the queue.
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