102. The no. of comparators required in a 3 bit comparator type ADC is
103. If the ladder reference voltage is 2 V, then minimum comparator resolution required is
104. In a 7 segment LED display, the minimum number of segments is activated when the input decimal number is
105. A 4 bit down counter starts counting from 1111 irrespective of modulus.
106. The number of counter states which an 8 bit stair step A/D converter has to pass through before conversion takes place is equal to
107. 74 HC series can sink upto 4 mA. The 74 LS series has IIL(max) - 0.4 mA. How many 74 LS inputs be driven by 74 HC output?
108. An 8 bit transistor register has output voltage of low-high-low-high-low-high-low-high. The decimal number stored is
109. The number of cells in a 4 variable K map is
110. Find the FSV (full scale voltage) in a 6 bit R-2R ladder D/A converter has a reference voltage of 6.5 V.
111. Parallel adder is
112. An 8 bit binary number is to be entered into an 8 bit serial shift register. The number of clock pulses required is
113. In the given figure, A = B = 1 and C = D = 0. Then Y =
114. Assertion (A): CMOS devices have very high speed.Reason (R): CMOS devices have very small physical size and simple geometry.
115. Binary number 11001 is equivalent to decimal number
116. Which of the following are included in the architecture of computer? Addressing mode, design of CPUInstruction set, data formatSecondary memory, operating system Select the correct answer using the codes given below:
117. Assertion (A): Tristate logic is used for bus oriented systems Reason (R): The outputs of a tristate logic are 0, 1 and indeterminant.
118. The value of 25 in octal system is
119. Assertion (A): ECL gate has very high speed of operation.Reason (R): Transistors in ECL do not go into saturation region.
120. Assertion (A): TTL is a very popular logic in SSI and MSI category.Reason (R): In Schottky TTL the power dissipation is less than in ordinary TTL.
121. FF16 when converted to 8421BCD =
122. ECL has high switching speed because the transistors are
123. Karnaugh map can not be drawn when the number of variables is more than 4
124. A dynamic RAM cell which holds 5 V has to be refreshed every 20 ms so that the stored voltage does not fall by more than 0.5 V. If the cell has a constant discharge current of 0.1 pA, the storage capacitance of cell is
125. In which counter does the maximum frequency depend on the modulus?