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It is required to use a rectifier circuit todesign a power supply that provides an average dc output voltage of12 V on which a maximum ripple voltage of 0.5 V is allowed. The rectifier feeds a load of 200 W and is fed from the linevoltage (120 Vrms, 60 Hz) through a transformer. The diodesavailable have a 0.7 V drop when conducting. If the designeropts for a half wave rectifier circuit:
A) Specify the rms voltage that must appear across the transform secondary.
B) Find the required valueof the filter capacitor.
C) Sketch Vs andVo.
D) From the sketch in C), find the maximum reverse voltage that will appear across the diode, andspecify the PIV rating of the diode.
E) Calculate the peak diode current.
1.5V battery. Design a voltage divider to provide a voltage that is approximately 1/3 of the battery voltage. Use resistances in the kilo ohms range. Redesign your divider so that the resistors are in Mega ohms range.
The armature is stationary so that the length of the air gaps, g=10mm, is fixed. A direct current passing through the coil produces flux density of 1.2 T in the gaps. assumeπr=4,000 for sheet steel. Determine a. The coil current.
The resistance of the coil is .4 ohm. The inductance of the coil is 2.4e-4 H. The rotor inertia is 2.0e-5 kg m2. The current to torque gain is 0.06 Nm/A. The friction torque is 0.18 Nm. A 12 V voltage source is applied to the motor.
A two-way link has a data rate of 40 kb/s while transmitting data in either direction, and a propagation delay of 20 milliseconds in each direction. A is sending frames of 1000 bits to B using stop-and-wait ARQ.
Using the results of (1) design a resistive network with an equivalent resistance of 3 kohms using 2 resistors with the same value from those: 1k, 1.2k, 1.5k, 1.8k, 2.2k, 2.7k, 3.3k, 3.9k, 4.7k, 5.6k, 6.8k. Find an expression for the equivalent res..
Design a synchronous sequential circuit that has a single input X and an output Y. Y goes to 1 if x(t) = x(t - 2). At all other times Y is to be 0. Use Moore model and JK flip-flop to implement the circuit. (a) Make the state definition
An asset with a first cost of $50,000 is depreciated by the MACRS method over a 10-year period. If the asset will have a $20,000 salvage value, its book value at the end of year two will be closest to
The armature of a simple DC generator is rotating at a speed of 188.5 rad/s. If the armature consists of 3 turns per coil, and a current is flowing in the field coils such that the field coils produce a flux of 0.0333 Wb
The system works as follows. When the main program starts to run, the microprocessor commands the A/D to convert. The microprocessor then sits in a dummy loop until the A/D interrupts, after it has completed the conversion and data is available.
one group of students made an error by using HCLinstead of H2SO4 to titrate an unknown solution of NaOH. Would this error change the calculated molarity of the NaOH solution.
The required exposure energy for a positive photoresist is 140 mJ/cm2 and for a negative photoresist is 9 mJ/cm2. Assuming negligible times for loading and unloading wafers, compare the wafer throughput for positive photoresist and negative photor..
A material is found to have a tenth-thickness of 2.3 cm for 1.25-MeV gamma rays. (a) What is the linear attenuation coefficient for this material (b) What is the half-thickness (c) What is the mean-free-path length for 1.25 MeV photons in this materi..
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