VLSI Design

Research Article

New Considerations for Spectral Classification of Boolean Switching Functions

Table 4

Type 4 input variable lookup table for 𝑛 = 3 . This table shows all possible exclusive-or combinations of the three input variables.
𝑥 3 𝑥 3 ⊕ 𝑥 2 𝑥 3 ⊕ 𝑥 1 𝑥 3 ⊕ 𝑥 2 ⊕ 𝑥 1
𝑥 2 𝑥 2 ⊕ 𝑥 1 𝑥 2 ⊕ 𝑥 3 𝑥 2 ⊕ 𝑥 1 ⊕ 𝑥 3
𝑥 1 𝑥 1 ⊕ 𝑥 2 𝑥 1 ⊕ 𝑥 3 𝑥 1 ⊕ 𝑥 2 ⊕ 𝑥 3