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The algorithm is feasible for circuits with dynamic and linear components. The
results of simulation are demonstrated by CMOS inverter, NAND gate and full
adder circuit in Fig. 1. Waveforms generated from the state variable method by C
were compared with the output of NgSPICE which uses traditional algorithm.
The resultant waveforms of fulladder, inverter and NAND Gate are shown in
Figs. 2, 3 and 4 respectively. The differences between the NgSPICE output,
which is in a dotted line and the C implementation of new SV method, which
appears as a solid line, are shown. These waveforms indicate that our result is
Fig. 1.
Fulladder circuit
Fig. 2.
Comparison between SV approach in C code of output fulladder(solid line) and
Ngspice(dotted line)
Fig. 3.
Comparison between SV approach in C code of output of CMOS inverter
