Issue link: https://resources.pcb.cadence.com/i/1180526
PSpice User Guide Analog behavioral modeling October 2019 351 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. An instantaneous device example: modeling a triode This section provides an example of using various ABM parts to model a triode vacuum tube. The schematic of the triode subcircuit is shown in Figure 6-13. Figure 6-13 Triode circuit. Assumptions: In its main operating region, the triode's current is proportional to the 3/2 power of a linear combination of the grid and anode voltages: ianode = k 0 *(v g + k 1 *va) 1.5 For a typical triode, k 0 = 200e-6 and k 1 = 0.12. Looking at the upper left-hand portion of the schematic, notice the a general-purpose ABM part used to take the input voltages from anode, grid, and cathode. Assume the following associations: ■ V(anode) is associated with V(%IN1) ■ V(grid) is associated with V(%IN2) ■ V(cathode) is associated with V(%IN3) The expression property EXP1 then represents V(grid, cathode) and the expression property EXP2 represents 0.12[V(anode, cathode)].