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Digital inversions * .tran 1e-8 1e-6 * v1 1 0 0.0 pulse(0 1 0 1e-8 1e-8 0.25e-6 0.5e-6) r1 1 0 1k * a1 [1] [2] adc .model adc adc_bridge * a2 2 3 inv a3 2 ~4 inv a4 ~2 5 inv a5 ~2 ~6 inv .model inv d_inverter * a6 [2 ~4] 7 nand .model nand d_nand * a8 [2 3 4 5 6 7] [12 13 14 15 16 17] dac .model dac dac_bridge * .end