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Boolean Algebra and Logic Circuits

核心考点

  • Truth tables 构建与化简
  • Boolean algebra laws(De Morgan's, distributive, commutative, associative)
  • Karnaugh maps(K-map)化简
  • Flip-flops(SR, JK)
  • Half adder / Full adder

Syllabus 覆盖范围

Section内容
15.2.1Truth tables and logic circuits
15.2.2Boolean algebra simplification
15.2.3Karnaugh maps
15.2.4Flip-flops (SR, JK)
15.2.5Adders (half adder, full adder)

常见题型

题型典型分值出现频率
Truth table from circuit4-5 分必考
K-map 化简5-7 分必考
Boolean algebra simplification3-4 分高频
Flip-flop 分析4-5 分中频

核心公式

  • De Morgan's:AB=A+B\overline{A \cdot B} = \overline{A} + \overline{B}, A+B=AB\overline{A + B} = \overline{A} \cdot \overline{B}
  • Distributive:A(B+C)=AB+ACA \cdot (B + C) = A \cdot B + A \cdot C
  • K-map:相邻格子可以合并(1, 2, 4, 8, ...)
  • Half adder:S=ABS = A \oplus B, Cout=ABC_{out} = A \cdot B