* Subcircuit full_adder .subckt full_adder 8 7 5 4 1 * eeschema netlist version 1.1 (spice format) creation date: wed jun 24 12:24:33 2015 .include half_adder.sub x1 8 7 6 2 half_adder x2 5 6 4 3 half_adder * u2 3 2 1 d_or a1 [3 2 ] 1 u2 * Schematic Name: d_or, NgSpice Name: d_or .model u2 d_or(fall_delay=1.0e-9 input_load=1.0e-12 rise_delay=1.0e-9 ) * Control Statements .ends full_adder