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+* Subcircuit half_adder
+.subckt half_adder 1 4 3 2
+* eeschema netlist version 1.1 (spice format) creation date: wed jun 24 11:31:48 2015
+* u2 1 4 3 d_xor
+* u3 1 4 2 d_and
+a1 [1 4 ] 3 u2
+a2 [1 4 ] 2 u3
+* Schematic Name: d_xor, NgSpice Name: d_xor
+.model u2 d_xor(fall_delay=1.0e-9 input_load=1.0e-12 rise_delay=1.0e-9 )
+* Schematic Name: d_and, NgSpice Name: d_and
+.model u3 d_and(fall_delay=1.0e-9 input_load=1.0e-12 rise_delay=1.0e-9 )
+* Control Statements
+
+.ends half_adder \ No newline at end of file