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GATE EC Combinatorial Circuits questions

Practise Combinatorial Circuits questions for GATE EC. Explore official PYQs and original topic-wise quizzes, check answers and view available solutions. Free, no sign-in.

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Official PYQ1998Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The noise margin of a TTL\text{TTL} gate is about
Official PYQ1998Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The minimum number of 22-input NAND\text{NAND} gates required to implement the Boolean function Z=ABˉCZ=A \bar{B} C, assiming that A,BA, B and CC are available, is
Official PYQ1997Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The output of the logic gate in the figure is
Official PYQ1997Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The inverter 74  ALSO474 \; \mathrm{ALSO} 4 has the following specifications IOH max⁡=−0.4 mA,lOLmax =8 mA,liHmax⁡=20 mA, liLmax =−0.1 mA, \begin{array}{l} \mathrm{I}_{\text{OH } \max }=-0.4 \mathrm{~mA}, \mathrm{l}_{\text{OLmax }}=8 \mathrm{~mA}, \mathrm{l}_{i H_{\max }}=20 \mathrm{~mA} \text{, } \\ \mathrm{l}_{\text{iLmax }}=-0.1 \mathrm{~mA} \text{, } \end{array} The fan-out based on the above will be
Official PYQ1997Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
In standard TTL\text{TTL}, the 'totem pole' stage refers to
Official PYQ1997Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
A 22 bit binary multiplier can be implemented using
Official PYQ1997Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The boolean function A+BC\mathrm{A}+\mathrm{BC} is a reduced form of
Official PYQ1997Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The gate delay of an NMOS\text{NMOS} inverter is dominated by charge time rather than discharge time because
Official PYQ1997Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
For the NMOS\text{NMOS} logic gate shown in the figure is the logic function implemented is
Official PYQ1997Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The decoding circuit shown in the figure is has been used to generate the active low chip select signal for a microprocessor peripheral. (The address lines are designated as AO\mathrm{AO} to A7\mathrm{A} 7 for l/O\mathrm{l} / \mathrm{O} addresses) The peripheral will correspond to 1/O1 / \mathrm{O} addresses in the range
Official PYQ1996Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
Schottky clamping is resorted in TTL\text{TTL} gates
Official PYQ1995Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The minimum number of NAND\text{NAND} gates required to implement the Boolean function A+AB‾+AB‾C\mathrm{A}+\mathrm{A} \overline{\mathrm{B}}+\mathrm{A} \overline{\mathrm{B}} \mathrm{C}, is equal to
Official PYQ1995Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The output of the circuit in the figure is equal to
Official PYQ1994Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
A PLA\text{PLA} can be used
Official PYQ1994Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The output of a logic gate is ‘11’ when all its inputs are at logic ‘00’. Then gate is either
Official PYQ1992Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
Given figure shows the circuit of a gate in the Resistor Transistor Logic (RTL)\text{(RTL)} family. The circuit represents a
Official PYQ1992Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The logic realized by the circuit shown in given figure is