MOS开关有cmos、nmos、pmos、rcmos、rnmos、rpmos。\\
例子：\\ 
<code verilog>
pmos p1 (out, data, control1);
</code>
例子：\\
<code verilog>
cmos (w, datain, ncontrol, pcontrol);
//is equivalent to:
nmos (w, datain, ncontrol);
pmos (w, datain, pcontrol);
</code>