Abstract
These comments are intended to supplement the work on the new class of reflectionless filters, reported by Morgan and Boyd, by providing some additional results useful for the design of the new filter. Only the case of a low-pass filter (LPF) is considered, as the other types can be obtained by frequency transformation of the LPF. An alternative realization of the basic LPF transfer function, which requires less than half the number of components, is also presented. However, it does not have the constant resistance feature; it will therefore be useful as the first stage in a cascade in a situation where frequency response is of primary importance, not matching.
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