| .SUBCKT BUF A Y | |
| .model buffer1 d_buffer | |
| Abuf A Y buffer1 | |
| .ENDS NOT | |
| .SUBCKT NOT A Y | |
| .model not1 d_inverter | |
| Anot A Y not1 | |
| .ENDS NOT | |
| .SUBCKT NAND A B Y | |
| .model nand1 d_nand | |
| Anand [A B] Y nand1 | |
| .ENDS NAND | |
| .SUBCKT NOR A B Y | |
| .model nor1 d_nor | |
| Anand [A B] Y nor1 | |
| .ENDS NOR | |
| .SUBCKT DLATCH E D Q | |
| .model latch1 d_latch | |
| Alatch D E null null Q nQ latch1 | |
| .ENDS DLATCH | |
| .SUBCKT DFF C D Q | |
| .model dff1 d_dff | |
| Adff D C null null Q nQ dff1 | |
| .ENDS DFF | |