In the following netlist, it writes
.print tran
*+ v_sweep      = par('resolution*(time-sweep_d)/step_t + swstart')
+ v_sweep      = v(v_sweep)
+ i_pulldown   = par('0')
+ i_gndclamp   = i(vgnd_clamp)
+ i_pullup     = par('0')
+ i_powerclamp = i(vpower_clamp)

after running the simulation, there will be a *.print file,
I want to know how to control the number of points measured, anyone can give some suggestions?
Thanks!



***************************************************
simulator lang=spectre
//////////////////// i-v curve simulations ////////////////////
subckt buffer  (1      2      3      4      5      6      7)
//               d_in   pad    puref  pclref pdref  gclref /en
x0 (2 3 4 5 6) input_buf            // <<<------ change buffer name here
ends
////////////////////////////////////////////////////////////////////////////////

include  "process.lib"  section=typ
include  "input_buf.inc"
////////////////////////////////////////////////////////////////////////////////

mytemp options  temp=50                        // temperature of typical case
//------------------------------------------------------------------------------

parameters  resolution =  5.0m       // voltage resolution of sweep
////////////////////////////////////////////////////////////////////////////////

parameters  puref_typ  =  3.300      // pullup reference voltage, typ.
parameters  puref_min  =  3.135      // pullup reference voltage, min.
parameters  puref_max  =  3.465      // pullup reference voltage, max.
parameters  pclref_typ =  puref_typ   // power clamp reference voltage, typ.
parameters  pclref_min =  puref_min   // power clamp reference voltage, min.
parameters  pclref_max =  puref_max   // power clamp reference voltage, max.
//------------------------------------------------------------------------------

parameters  pdref_typ  =  0.000      // pulldown reference voltage, typ.
parameters  pdref_min  =  0.000      // pulldown reference voltage, min.
parameters  pdref_max  =  0.000      // pulldown reference voltage, max.
parameters  gclref_typ =  pdref_typ   // gnd clamp reference voltage, typ.
parameters  gclref_min =  pdref_min   // gnd clamp reference voltage, min.
parameters  gclref_max =  pdref_max   // gnd clamp reference voltage, max.
////////////////////////////////////////////////////////////////////////////////

parameters  pd_ref     = pdref_typ    // reference voltages for typical case
parameters  gcl_ref    = gclref_typ
parameters  pu_ref     = puref_typ
parameters  pcl_ref    = pclref_typ
//------------------------------------------------------------------------------

parameters  ven        = pd_ref       // active-low enable
//parameters  ven        = pu_ref       // active-high enable
////////////////////////////////////////////////////////////////////////////////

simulator lang=hspice
.measure tran  vpower        param = 'pu_ref-pd_ref'
.measure tran  gnd_cl_ref    param = gcl_ref
.measure tran  power_cl_ref  param = pcl_ref
.print tran
*+ v_sweep      = par('resolution*(time-sweep_d)/step_t + swstart')
+ v_sweep      = v(v_sweep)
+ i_pulldown   = par('0')
+ i_gndclamp   = i(vgnd_clamp)
+ i_pullup     = par('0')
+ i_powerclamp = i(vpower_clamp)
////////////////////////////////////////////////////////////////////////////////

simulator lang=spectre
myvsweep (v_sweep 0) bsource v=(resolution*($time-sweep_d)/step_t + swstart)
mytran tran  step=step_t  stop=sweep_t  start= sweep_d
////////////////////////////////////////////////////////////////////////////////

vrefpd     (pdref   0)  vsource dc = pd_ref
vrefgndcl  (gclref  0)  vsource dc = gcl_ref
vrefpu     (puref   0)  vsource dc = pu_ref
vrefpowcl  (pclref  0)  vsource dc = pcl_ref

von        (von     0)  vsource dc = ven
voff       (voff    0)  vsource dc = (pu_ref-(ven-pd_ref))
//------------------------------------------------------------------------------

parameters

I use spectre stand alone to simulate the circuit.
That is ,given a test.scs, then run "spectre test.scs" can get the simulation results.
I tried to change the step/stop time, but failed.
Also, I use strobeperiod option in the test.scs, however,the print file also contain some information which is not just by strobeperiod of time.

Any other suggestions?
Thanks.


ywguo wrote on Sep 16^th, 2009, 10:23pm: