Govt. Exams
Entrance Exams
Fanout is the maximum number of gate inputs of the same type that one gate output can reliably drive without degradation.
Sum-of-Products form involves taking the AND (product) of variables and then OR (sum) of all such products to form the logic function.
A Schmitt trigger converts analog input to digital output with hysteresis, providing noise immunity and cleaner transitions.
A 4:2 encoder has 4 inputs and 2 outputs. However, for 8 inputs, a 3:8 encoder or 8:3 decoder is needed. Input line 5 would give binary 101.
Ripple counters have cascading propagation delays as each stage must wait for the previous stage to settle, making them slower than synchronous counters.
De Morgan's Law states (AB)' = A' + B' and (A+B)' = A'B'. Option C correctly represents one form of this law.
CMOS technology uses complementary pairs of transistors resulting in lower static power dissipation and better noise margins compared to NMOS.
A Priority Encoder produces a binary output representing the highest priority active input among multiple inputs.
Minimum flip-flops needed = ⌈log₂(number of states)⌉ = ⌈log₂(7)⌉ = 3.
XOR truth table: Y=1 when inputs differ. Both AB' + A'B and A'B + AB' are equivalent canonical forms.
