hi flushrat is right
for more things about you can refer the hspice manual in "initializing dc/operating points point analysis"
there following is the about SAVE command.
.SAVE Statement
The .SAVE statement in HSPICE stores the operating point of a
circuit, in a file that you specify. For quick DC convergence in
subsequent simulations, use the .LOAD statement to input the
contents of this file. HSPICE saves the operating point by default,
even if the HSPICE input file does not contain a .SAVE statement. To
not save the operating point, specify .SAVE LEVEL = NONE.
You can save the operating point data as either an .IC or
a .NODESET statement.
SYNTAX:
.SAVE <TYPE = type_keyword> <FILE = save_file>
+ <LEVEL = level_keyword> <TIME = save_time>
Parameter Description
type_keyword Storage method, for saving the operating point. The type can be one of the
following. Default is NODESET.
• .NODESET: Stores the operating point as a .NODESET statement. Later
simulations initialize all node voltages to these values, if you use
the .LOAD statement. If circuit conditions change incrementally, DC
converges within a few iterations.
• .IC: Stores the operating point as a .IC statement. Later simulations
initialize node voltages to these values if the netlist includes the .LOAD
statements.
save_file Name of the file that stores DC operating point data. The file name format is
<design>.ic#. Default is <design>.ic0.
level_keyword Circuit level, at which you save the operating point. The level can be one of
the following.
• ALL (default): Saves all nodes, from the top to the lowest circuit level. This
option offers the greatest improvement in simulation time.
• TOP: Saves only nodes in the top-level design. Does not save subcircuit
nodes.
• NONE: Does not save the operating point.
save_time Time during transient analysis, when HSPICE saves the operating point.
HSPICE requires a valid transient analysis statement, to save a DC operating point. Default = 0.
