Table of Contents
Advertisement
BUILDING BLOCK FUNCTIONS-FOUNDATION OF DESIGN
Another realization can be based on the equation
LOA T, X, ROO;
SUB T, A, ROO; X-A in T
y =
I
x-a
I - I
x+a
I
ABS Y, T, ROO; Y=ABS(X-A)
which realizes the same shape curve as that of Figure
ADD T, A, LOI; X+A in T
4-3, with a value of L
=
2a. This form generally takes
ABS T, T, ROO; ABS (X+A) in T
more steps than the overflow saturation method, but
SUB Y, T, ROO; Y = ABS( X-A) - ABS( X+A)
allows greater freedom in setting parameters. The 2920
code might appear as follows, where A represents the
limiter threshold, and T is a location used only for
intermediate calculations:
4-10
Advertisement
Table of Contents
