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Recent questions tagged digital-logic

1 votes
2 answers
2193
Digital logic
A number system uses 20 as the radix. The excess code that is necessary for its equivalent binary coded representation is ?
A number system uses 20 as the radix. The excess code that is necessary for its equivalent binary coded representation is ?
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4 votes
3 answers
2194
How to solve this boolean Exp?
Boolean Expression is (A+B).(B+C) Please give a detailed explanation.
Boolean Expression is (A+B).(B+C)Please give a detailed explanation.
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0 votes
1 answer
2195
Truth Table for 4 variables?
Someone please tell me the truth table for 4 variables, say (A,B,C,D). What all 16 possible input combinations will be? Thank you in advance.
Someone please tell me the truth table for 4 variables, say (A,B,C,D). What all 16 possible input combinations will be? Thank you in advance.
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0 votes
2 answers
2196
What happens when the input of a flip flop changes exactly at the time of the clock pulse transition?
Will the output be as per previous values or new values?
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3 votes
2 answers
2197
How do I solve this Boolean expression?
How do I solve this Boolean expression? $(A+B) \cdot (B+C) \cdot (C+A)$ Kindly write the step wise explanation with properties used.
How do I solve this Boolean expression?$$(A+B) \cdot (B+C) \cdot (C+A)$$Kindly write the step wise explanation with properties used.
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24 votes
4 answers
2198
GATE1992-04-c
Design a $3$-bit counter using D-flip flops such that not more than one flip-flop changes state between any two consecutive states.
Design a $3$-bit counter using D-flip flops such that not more than one flip-flop changes state between any two consecutive states.
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6 votes
2 answers
2200
ISRO2008-48
Which of the following is termed as minimum error code ? Binary code Gray code Excess-$3$ code Octal code
Which of the following is termed as minimum error code ?Binary codeGray codeExcess-$3$ codeOctal code
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19 votes
2 answers
2202
GATE CSE 1993 | Question: 6.2
If the state machine described in figure should have a stable state, the restriction on the inputs is given by $a.b=1$ $a+b=1$ $\bar{a} + \bar{b} =0$ $\overline{a.b}=1$ $\overline{a+b} =1$
If the state machine described in figure should have a stable state, the restriction on the inputs is given by$a.b=1$$a+b=1$$\bar{a} + \bar{b} =0$$\overline{a.b}=1$$\over...
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7 votes
1 answer
2203
If a 3 bit multiplicand is multiplied to a 2 bit multiplier, minimum number of two input AND, XOR, and OR gates, needed?
If a 3 bit multiplicand is multiplied to a 2 bit multiplier, minimum number of two input AND, XOR, and OR gates, needed in the design are respectively?A)    16,14,1B) �...
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7 votes
2 answers
2204
ISRO2014-25
Suppose you want to build a memory with $4$ byte words and a capacity of $2^{21}$ bits. What is type of decoder required if the memory is built using $2K \times$ $8$ $\text{RAM}$ chips? $\text{5 to 32}$ $\text{6 to 64}$ $\text{4 to 16}$ $\text{7 to 128}$
Suppose you want to build a memory with $4$ byte words and a capacity of $2^{21}$ bits. What is type of decoder required if the memory is built using $2K \times$ $8$ $\te...
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1 votes
5 answers
2205
Digital Logic
No of switching fn for f (A, B, C, D)=BD+B'D' How to approach this question ?
No of switching fn for f (A, B, C, D)=BD+B'D'How to approach this question ?
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0 votes
1 answer
2206
How to check whether A EX-NOR(BC) =(A EX-NOR B) (A EX-NOR C) ?
Taking A=0, LHS= B'+C' and RHS= B'C' Taking A=1 ,LHS=BC RHS= BC Now for A=1 it is satisfied while for A=0 not satisfied so does the identity hole or not ?
Taking A=0, LHS= B'+C'and RHS= B'C'Taking A=1 ,LHS=BCRHS= BCNow for A=1 it is satisfied while for A=0 not satisfied so does the identity hole or not ?
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10 votes
3 answers
2207
ISRO2014-21, UGCNET-Dec2012-III: 23, UGCNET-Dec2013-III: 22
What are the final values of $\text{Q}_1$ and $\text{Q}_0$ after $4$ clock cycles, if initial values are $00$ in the sequential circuit shown below: $11$ $01$ $10$ $00$
What are the final values of $\text{Q}_1$ and $\text{Q}_0$ after $4$ clock cycles, if initial values are $00$ in the sequential circuit shown below:$11$$01$$10$$00$
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1 votes
3 answers
2209
multiplexer
by using a 8 * 1 MUX if 4 variable function is realized then the circuit is ? (a) unique circuits (b) 2 possible circuits (c) multiple possible circuits (d) not possible to realise the boolean function
by using a 8 * 1 MUX if 4 variable function is realized then the circuit is ?(a) unique circuits(b) 2 possible circuits(c) multiple possible circuits(d) not possible to r...
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0 votes
2 answers
2211
substract
( 1100 0000 0001 0010.0010 0101 )2 - ( 10111001110.101 )2 = ? Explain in details how this substraction is performed .
( 1100 0000 0001 0010.0010 0101 )2 - ( 10111001110.101 )2 = ?Explain in details how this substraction is performed .
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0 votes
1 answer
2212
Three state Buffer
I am just reading that Microperations from Morris mano They have explained the concept of 3 state gate which can be used as a multiplexer which have output 1, 0 and high Impedance. what is used of it (I am not getting )
I am just reading that Microperations from Morris mano They have explained the concept of 3 state gate which can be used as a multiplexer which have output 1, 0 and high ...
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0 votes
1 answer
2213
solve
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0 votes
3 answers
2214
solve
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0 votes
1 answer
2215
solve
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0 votes
1 answer
2216
solve
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0 votes
1 answer
2217
solve
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0 votes
2 answers
2218
solve
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0 votes
2 answers
2219
solve it
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0 votes
1 answer
2220
Find the correct output
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