Electrical Engineering Answers

‘A decoder with an enable input can be used as a DEMUX’. Justify and design a 3:8

decoder using 2:4 decoder so that it can also be used as a 1:8 DEMUX.

Design a 3-bit Even Parity Generator circuit using a Decoder with Active-Low outputs.

Design a 4:2 Priority Encoder such that the order of priority of the decimal inputs is given

as D2> D0> D1> D3, where all Di’s are inputs to the priority encoder.

Consider the circuit shown in Fig. 1. If 𝑉1 = 10V; the BJT has a β = 200 and 𝐼𝑠 = 10 𝑎𝐴 and the

capacitors are short circuits in the frequency range of operation, determine the values of 𝑅1 and 𝑅2, if

the amplifier is to have a gain of 100. What is its’ operating point ? It is given that 𝑅3 = 100 Ω.

You are provided with the BC547 transistor and E24 series of resistors, along with a voltage supply of 10 V. If the transistor can be assumed to have a 𝛽 = 200, design a common-emitter amplifier to the following specifications:

a. The amplifier should be biased in the middle of the active region.

b. A sinusoidal output of amplitude 1 V should be obtained when a sinusoidal input of amplitude 10 mV and frequency 10 kHz, is applied from a source of resistance 5 kΩ. 

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It is found that the attenuation on a 50Ω distortionless T-line is 0.01

dB/m. The line has a capacitance of 0.1 nF/m, then the value of

resistance, inductance and conductance per meter of the line are

respectively

"Strobe control mechanism for asynchronous data transfer does not ensure whether the

data transmitted by source unit is accepted by destination unit." Suggest possible

enhancement(s) to this mechanism to overcome this limitation.

Evaluate the following program with the One address and Zero address instructions.

(X*Y)-(R+S). Also write two differences between them.

5. For the circuit below find: a. power factor b. Average power delivered by source c. Active and reactive power d. Apparent power e. Complex powe