The existence of nonzero equilibria in delta-operator fixed point and block
floating point (BFP) systems is investigated and methods for avoiding such
equilibria are proposed. In the fixed point case these methods work by map
ping the region in which nonzero equilibria may appear to zero. This is pos
sible if the region is small. It is also shown that nonzero equilibria and
limit cycles of any period can always be avoided by using BFP arithmetic wi
th a sufficiently large mantissa wordlength.