Table 1.
Coupling Rc and input Rint resistances of the Chua circuits.
| Node | Rin [kΩ] | Rc [kΩ] | Rint [kΩ] |
|---|---|---|---|
| XNOR GATE | |||
| A1 | 0.6 (s(t) → A1) | 3.13 (A1 → A2) | 100 (A1 ↔C) |
| A2 | 1.2 (s(t) → A2) | 100 (A2 → A1) | 100 (A2 ↔C) |
| AND GATE | |||
| B1 | 32 (s(t) → B1) | 7.22 (B1 → B2) | 100 (B1 ↔C) |
| B2 | 61 (s(t) → B2) | 96 (B2 → B1) | 100 (B2 ↔C). |
Note that the coupling strength is proportional to the inverse of the resistances. Rin accounts for the resistance of the input signal of each circuit. Rc is the coupling resistance of the output signal of each unit to its neighbors. Rint is the integration resistance that quantifies the amount of coupling from each unit to the integrator. Parenthesis indicate the direction of the coupling between units i and j, which can be either unidirectional (→) or bidirectional (↔). See Figure 4 for details.