70401. An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if
70402. The greatest negative number which can be stored is 8 bit computer using 2's complement arithmetic is
70403. A JK flip flop has tpd= 12 ns. The largest modulus of a ripple counter using these flip flops and operating at 10 MHz is
70404. The basic storage element in a digital system is
70405. In a ripple counter,
70406. A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is
70407. For the truth table of the given figure Y =
70408. A full adder can be made out of
70409. If the functions w, x, y, z are as follows.w = R + P Q + R S , x = PQR S + PQR S + PQ R S Then
70410. The output of a half adder is
70411. Minimum number of 2-input NAND gates required to implement the function F = (x + y ) (Z + W) is
70412. Which device has one input and many outputs?
70413. A carry look ahead adder is frequently used for addition because
70414. The counter in the given figure is
70415. In register index addressing mode the effective address is given by
70416. 7BF16 = __________ 2
70417. For the minterm designation Y = ∑ m (1, 3, 5, 7) the complete expression is
70418. Zero suppression is not used in actual practice.
70419. A counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time
70420. The hexadecimal number (3E8)16 is equal to decimal number
70421. The number of distinct Boolean expression of 4 variables is
70422. The fixed count that should be used so that the output register will represent the input for a 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).
70423. For the K map in the given figure the simplified Boolean expression is
70424. A memory system of size 16 k bytes is to be designed using memory chips which have 12 address lines and 4 data lines each. The number of such chips required to design the memory system is
70425. In a 7 segment display, LEDs b and c lit up. The decimal number displayed is
70426. AB + AB =
70427. In a BCD to 7 segment decoder the minimum and maximum number of outputs active at any time is
70428. A three state switch has three outputs. These are
70429. Maxterm designation for A + B + C is
70430. 1's complement of 11100110 is
70431. Assertion (A): A demultiplexer can be used as a decoder.Reason (R): A demultiplexer can be built by using AND gates only.
70432. Assertion (A): The output of a NOR gate is equal to the complement of OR of input variables. Reason (R): A XOR gate is a universal gate.
70433. The number of bits in ASCII is
70434. 4 bit 2's complement representation of a decimal number is 1000. The number is
70435. In a D latch
70436. A 4 : 1 multiplexer requires __________ data select line.
70437. The number of unused states in a 4 bit Johnson counter is
70438. It is desired to display the digit 7 using a seven segment display. The LEDs to be turned on are
70439. For a MOD-12 counter, the FF has a tpd = 60 ns The NAND gate has a tpd of 25 n sec. The clock frequency is
70440. 1001012 is equal to decimal number
70441. A Karnaugh map with 4 variables has
70442. An 8 bit data is to be entered into a parallel in register. The number of clock pulses required is
70443. Which of the following is error correcting code?
70444. A universal shift register can shift
70445. Available multiplexer IC package can have a maximum of 8 inputs.
70446. A16 X 216 __________ .
70447. For the binary number 11101000, the equivalent hexadecimal number is
70448. AECF116 + 15ACD16 = __________ .
70449. A XOR gate has inputs A and B and output Y. Then the output equation is
70450. Wired AND connection can be used in TTL with totem pole output.
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