How to study Digital Logic — Semester I, Pokhara University BECE
What it covers
Number systems, Boolean algebra and logic gates, simplification with K-maps, combinational circuits (adders, multiplexers, decoders), flip-flops, registers, counters, and synchronous and asynchronous sequential circuit design.
Topics worth extra time
- Number systems and codes: binary, octal, hexadecimal, BCD, Gray code, signed numbers and complements
- Boolean algebra and simplification with Karnaugh maps (including don’t-care conditions)
- Combinational circuits: adders, subtractors, multiplexers, decoders, encoders and comparators
- Flip-flops (SR, JK, D, T), their characteristic and excitation tables
- Counters and registers, and designing synchronous sequential circuits from state diagrams
How to study it
Draw every circuit yourself. For each combinational block, write the truth table, simplify with a K-map and draw the gate diagram; for sequential circuits, go from state diagram to state table to excitation table to circuit. Once the method is clear, a simulator such as Logisim helps you check designs, and the lab work reinforces the same steps.
In the exam
Design questions reward a clear, ordered method: truth or state table, K-map, simplified expression, then the final circuit. Label inputs and outputs, and double-check K-map groupings, since one wrong group changes the whole answer.