exp_func :
An exponential function for an xreal-typed signal.

The exp_func primitive produces an xreal-typed output which is an exponential function of an xreal-typed input. That is,

    out = exp(in).

The parameter base sets the base of the exponential function (default: M_E=2.718282). The parameter scale sets the additional scale factor applied to the output.

The primitive first approximates the input as a piecewise-linear (PWL) waveform before computing its exponential function output. The parameters abstol and reltol set the absolute and relative tolerances of such PWL approximation, respectively.

NOTE: this primitive adds a unit timestep delay from its input to output for synchronization.

Input/Output Terminals

Name	I/O	Type	Description
out	output	xreal	output signal
in	input	xreal	input signal

Parameters

Name	Type	Default	Unit	Description
base	real	M_E	None	base of the exponential function
scale	real	1.0	None	scale factor
abstol	real	1e-4	None	absolute tolerance for input
reltol	real	1e-2	None	relative tolerance for input