sqrt_func :
A square-root function for an xreal-typed signal

The sqrt_func primitive produces an xreal-typed output which is a square-root of an xreal-typed input. That is,

    out = sqrt(in).

The parameter scale sets the additional scale factor applied to the output.

The primitive approximates the square-root function with a piecewise-linear (PWL) function and the parameters abstol and reltol set the absolute and relative tolerances of such PWL approximation, respectively. Specifically, the parameter abstol determines the width of the first PWL section and the parameter reltol determines how the widths of the subsequent PWL sections scale progressively.

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
scale	real	1.0	None	scale factor
abstol	real	1e-4	None	absolute tolerance
reltol	real	1e-2	None	relative tolerance