Digital Circuits
Instructions:
- The marks are indicated in the right-hand margin.
- There are NINE questions in this paper.
- Attempt FIVE questions in all.
- Question No. 1 is compulsory.
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Find the hexadecimal equivalent of the decimal number 256.
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What is meant by weighted and non-weighted coding?
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State Demorgan's theorem.
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What do you mean by carry propagation delay?
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What do you mean by Encoder?
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What are the primary disadvantages of an asynchronous counter?
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What are races and cycles?
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Why is MUX called as data selector?
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When can RTL be used to represent digital system?
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Draw the DTL based NAND gate.
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Describe the procedure to design of asynchronous sequential circuit in detail with an example.
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What are the disadvantages of asynchronous sequential circuit?
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Explain the characteristics and about TTL parameters. Discuss implementation of the following digital logic families : (a) CMOS (b) TTL
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Discuss about TTL parameters.
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Explain the realization of JK flipflop from T flipflop.
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Design a 4-bit BCD ripple counters.
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What is meant by magnitude comparator? Discuss in detail about two bit magnitude comparator.
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Design a full adder using NOR gates.
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Explain briefly about SOP and POS forms with example.
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Plot the logical expression ABCD+AoverlineBoverlineCoverlineD+AoverlineBC+AB on a 4 variable K-map. Obtain the simplified expression from the map.
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How does don't care condition in K-map help for circuit simplification?
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Write the POS form of the SOP expression f(x,y,z)=overlineXYZ+XYoverlineZ+XoverlineYZ.
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Implement the following function using suitable multiplexer. F(a,b,c)=Σm(3,4,5,7).
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Implement JK flipflop using SR flipflop.
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Analog to Digital Converter
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Multivibrator
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Monostable and Astable timer