p2-82.sp

HSPICE程序和仿真。可以直接在HSPICE里面RUN.

*Subcircuit and 2nd order filter circuit*
.options        post
*i/o node:      V-     V+     Vo     Vognd
.subckt opamp   1       2       7      4
ri      1       2       2.0e6
*VCCS with a gain of 1
gb      4       3       1       2      1
r1      3       4       10k
c1      3       4       2u
*VCVs with a gain of 1k
ea      4       5       3       4      1k
ro      5       7       75
*end of subcircuit opamp
.ends
*main circuit
vs      1       0       ac      1
r3      1       2       1k
c4      2       0       2u
xa1     2       0       3       0      opamp
c2      3       0       1u
r2      2       3       100k
.ac     dec     5       10      100k
.plot   ac      vdb(3)
.end