User`s guide

17 Fixed-Point Blockset 3.1 Release Notes
17-4
Decrement Stored
Integer
Math Decrease the stored value of a signal by one
Decrement Time To
Zero
Math Decrease the real world value of the signal by
the sample time, but only to zero.
Decrement To Zero Math Decrease the real world value of a signal by
one, but only to zero.
Derivative Calculus Compute a discrete time derivative.
Detect Change Edge Detect Detect a change in a signal’s value.
Detect Decrease Edge Detect Detect a decrease in a signal’s value.
Detect Fall Negative Edge Detect Detect a falling edge when the signal’s value
decreases to a strictly negative value, and its
previous value was nonnegative.
Detect Fall Nonpositive Edge Detect Detect a falling edge when the signal’s value
decreases to a nonpositive value, and its
previous value was strictly positive.
Detect Increase Edge Detect Detect an increase in a signal’s value.
Detect Rise
Nonnegative
Edge Detect Detect a rising edge when a signal’s value
increases to a nonnegative value, and its
previous value was strictly negative.
Detect Rise Positive Edge Detect Detect a rising edge when a signal’s value
increases to a strictly positive value, and its
previous value was nonpositive.
Difference Calculus Calculate the change in a signal over one time
step.
Filter Direct Form I Filters Implement a Direct Form I realization of a
filter.
Filter Direct Form I
Time Varying
Filters Implement a time varying Direct Form I
realization of a filter.
Block Name Library Description