GATE EC Digital Circuits questions

In the circuit shown in the figure $\mathrm{A}$ is a parallel-in, parallel-out $4$ bit register, which loads at the rising edge of the clock $C$. The input lines are connected to a $4$ bit bus, $W.$ Its output acts as the input to a $16 \times 4$ ROM whose output is floating when the enable input $E$ is $0.$ A partial table of the contents of …

In an $8085$ microprocessor, the instruction CMP $B$ has been executed while the content of the accumulator is less than that of register $B$. As a result

A sinusoidal signal with peak-to-peak amplitude of $1.536 \mathrm{~V}$ is quantized into $128$ levels using a mid-rise uniform quantizer. The quantization-noise power is

The number of comparators required in a $3$-bit comparator type ADC is

If the input to the digital circuit the figure, consisting of a cascade of $20 \; \mathrm{XOR}$-gates is $\mathrm{X}$, then the output $Y$ is equal to

$4$-bit $2$'s complement representation of a decimal number is $1000.$ The number is

Consider the following assembly language program. …

If the input $X_{3}, X_{2}, X_{1}, X_{0}$ to the ROM in the figure are $8-4-2-1$ BCD numbers, then the outputs $Y_{3} Y_{2} Y_{1} Y_{0}$ are

The circuit in the figure is has two $\text{CMOS NOR}$-gates. This circuit functions as a

An $8085$ microprocessor based system uses a $4 \mathrm{K} \times 8 \text{bit RAM}$ whose starting address is $\text{AA00 H}$. The address of the last byte in this $\text{RAM}$ is

For the ring oscillator shown in the figure, the propagation delay of each inverter is $100$ pico sec. What is the fundamental frequency of the oscillator output?

Consider the following two statements : $\text{Statement 1: A}$ stable multivibrator can be used for generating square wave. $\text{Statement 1: B}$ stable multivibrator can be used for storing binary information.

The $2$'s complement representation of $-17$ is

In the TTL circuit in the figure, $\mathrm{S}_{2}$ to $\mathrm{S}_{0}$ are select lines and $\text{X}_{7}$ to $\text{X}_{0}$ are input lines. $\text{S}_{0}$ and $\text{X}_{0}$ are LSBs. The output $Y$ is

The number of comparators in a $4$ bit flash $\text{ADC}$ is

In the $8085$ microprocessor, the $\text{RST6}$ instruction transfers the program execution to the following location:

For the logic circuit shown in the figure is the required input condition $(A, B, C)$ to make the output $(X)=1$ is

The number of hardware interrupts (which require an external signal to interrupt) present in an $8085$ microprocessor are

An $8$ bit successive approximation analog to digital converter has full scale reading of $2.55 \mathrm{~V}$ and its conversion time for an analog input of $1 \mathrm{~V}$ is $20 \; \mu \mathrm{s}$. The conversion time for a $2 \mathrm{~V}$ input will be

In given figure, the $J$ and $K$ inputs of all the four Flip-Flips are made high. The frequency of the signal at output $Y$ is