Comments on "An improved sufficient condition for absence of limit cycles in digital filters

For the original article see ibid., vol.ASSP-26, P.334-8 (1978). The commenter states that the improved sufficient condition given by W.L. Mills et al., first suggested by K. Meerkotter (Proc. ISCAS p.295-8, 1976), was also explicitly shown by the commenter (Proc. Int. Conf. on Acoustics, Speech and Signal Processing, p.517-20, Apr. 1986), who applied it to the design of novel second-order structures, such as the modified Agarival-Burrus structure.<>