Digital filter for electrical signals

Details Digital filter for electrical signals Digital filter for electrical signals

1975-04-17

1976-09-14

Smith, Jerry

Registers

Transfer mechanism

Traveling pawl

328167, 333 70R, G06F 1534, H03H 710

Patent

active

039808726

ABSTRACT:
A wave digital filter comprising at least one filter section without delay elements, each port thereof having a positive port admittance, and the signal quantities therein being operated upon, preferably within certain individual multiport adaptors of the filter section, in such a way that the pseudo power, ##EQU1## RECEIVED BY RESPECTIVE ADAPTOR PORTS V OF PORT ADMITTANCE G.sub.v and associated with input quantities a.sub.v (t.sub.m) and output quantities b.sub.v (t.sub.m) at respective operating times t.sub.m, is equal to or preferably only slightly greater than the value of the pseudo power function p (t.sub.m) which is obtained by omitting rounding or truncating, respectively, or overflow of the numbers being processed, and instead carrying out arithmetic operations precisely.

REFERENCES:
patent: 3749895 (1973-07-01), Kao
patent: 3794936 (1974-02-01), Poschenrieder et al.
A. Fettweis, "Pseudopassivity, Sensitivity, and Stability of Wave Digital Filters," IEEE Trans. on Circuit Theory, vol. CT-19, No. 6, 11-1972, pp. 668-673.
A. Fettweis, "Some Principles of . . . Filters Imitating Classical Filter Structures," IEEE Trans. on Circuit Theory, vol. CT-18, No. 2, 3-1971, pp. 314-316.

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