I can find following options for extrap_char of $table_model() in Cadence Verilog-A Language Reference.
Quote:extrap_char ::= C | L | S | E
I know C, L, and E.
However I don't know S.
What does it mean by "S" as extrap_char of $table_model() ?
C=Clamp or Constant Extrapolation Method
L=Linear Extrapolation Method
S=???
E=Error Extrapolation Method