Q. Consider the following digital circuits:

1. Multipliers
2. Read only memories
3. D-latch
4. Circuits as shown in figure

Which of these come under the class of combinational circuit?

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Q. The open wired circuit in the given figure works as a

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Q. The circuit shown below is functionally equivalent to

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Q. The clock shown in figure has a frequency of 6 MHz. The frequency of the Q output will be

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Q. If all bubbles are removed, what are the new RAM locations?

The 8156 of a figure has RAM locations from 2000 H to 20 FFH.

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Q. The logic operations of the two circuits given below are

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Q. A 3 stage Johnson counter (ring) shown in figure is clocked at a constant frequency of fc from the starting state of Q₀ Q₁ Q₂ = 101. The frequency of output Q₀ Q₁ Q₂ will be

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Q. In the given figure shows a 3 bit shift register using TTL flip flops. Initially all the flip flops are set to 0 state. After 8 clock pulses

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Q. Figure shows an 8-bit LED display. A light circle means that a LED is ON (binary 1) and a dark circle means a LED is OFF (binary 0). What is the decimal equivalent of the binary number displayed?

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Q. Which type of gate is in the given figure?

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Q. Given figure is the voltage transfer characteristic of

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Q. An 8-bit microprocessor has 16 bit address bus A₀ - A₁₅. The processor addresses a 1-K byte memory chip as shown. The address range for the chip is

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Q. The circuit shown in the figure is a

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Q. For the circuit shown in the figure, what is the frequency of the output Q?

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Q. Figure shows three pulse train inputs to a 3-input OR gate. Assuming positive logic, the output pulse rate train in figure (b) would be

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Q. For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is given by

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Q. If number of bits is N, the % resolution in analog to digital conversion is

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Q. Examine the following truth table. The product of sum from this truth table is

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Q. The circuit shown in figure converts

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Q. What is the direction of address bus?

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