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Consider the following 3NF relations about a sorority or fraternity:
a. Foreign keys are not indicated in these relations. Decide which attributes are foreign keys and justify your decisions.
b. Draw an E-R diagram for these relations, using your answer to part a.
c. Explain the assumptions you made about cardinalities in your answer to part b. Explain why it is said that the E-R data model is more expressive or more semantically rich than the relational data model.
The average noise power per unit bandwidth measured at the front end of an AM receiver is 10^(-3) watt per Hertz. The modulating wave is sinusoidal, with a carrier power of 80 kilowatts, and a sideband power of 10 kilowatts per sideband.
Determine the gain K so that the phase margin is 45 degrees. For the gain K selected in part (a), determine the gain margin. Predict the bandwidth of the closed-loop system.
An amplifier has an input resistance of 100 Ω, an output resistance of 10 Ω, and a short-circuit current gain of 500. Draw the voltage amplifier model for the amplifier, including numerical values for all parameters. Repeat for the transresistance..
A CB amplifier is operating with Rl = 10 kohm, Rc = 10 kohm, and Rsig = 100 ohm. At what current Ic should the transistor be biased for the input resistance Rin to equal that of the signal source
There are 5 inductors in series and they are 1H,2H,3H,4H,5H what is the total equivalent inductance. There are 5 capacitors in series and they are 1F,2F,3F,4F,5F. what is the total equivalent capacitance.
A Si p-n-p transistor has impurity concentrations of 5´1018, 2´1017, and 1016 cm-3 in the emitter, base, and collector, respectively. The base width is 1.0mm, and the device cross-sectional area is 0.2 mm2.
Plot the VTC of a CMOS inverter and alculate the waveform - Your answer should look like this - Use FindRoot to calculate TPHL and TPLH for the first stage inverter and the second stage inverter.
a 300-kilowatt-ampere transformer bank consisting of three 100-kilovolt-ampere transformer has a 3-phase 480-volt
Show how, in an embedded system using a Gumnut core, the keypad controller of Example 8.3 and two instances of the ADC controller of Example 8.4, the components are interconnected using distributed multiplexers.
A BJT is operated in a 50ohm circuit 1.5Ghz. FOr the bias conditions of Collector Current - 4mA and Collector-Emittor Voltage = 10V. The manufacturer provides the S-parameters in magnitude and angles (in degrees) as follows. S11 = 0.7
Assume that the step of the person is about 0.6m. Compute the current through his legs and his step potential.
Devise a signal-conditioning system that will provide an appropriate digital output to a computer. Specify the requirements on the ADC and appropriate analog signal conditioning to interface to your ADC.
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