  Modifications of the authors' previously-published, generalized,
lumped-element, reflectionless filter topologies are presented which remove the
original constraints on the relative values of its prototype parameters. Thus,
any transfer function which can be realized as the transmission or reflection
coefficient of a conventional ladder prototype may now be implemented in
reflectionless form --- that is, having the same transfer function in
transmission but with identically zero reflection coefficient at both ports and
at all frequencies from DC to infinity, given ideal elements. The theoretical
basis of these modifications is explained, and then tested via the construction
of passive, reflectionless low-pass filter prototypes that, in the prior
topology, would have required negative reactive elements. The results show
excellent agreement with theory.
