Boots – shoes – and leggings
Patent
1976-04-02
1977-12-06
Malzahn, David H.
Boots, shoes, and leggings
333 70R, G06F 1534, H03H 710
Patent
active
040619052
ABSTRACT:
In one illustrative embodiment, a filter circuit for discrete signals is provided corresponding in filter function to an analog ladder structure containing inductive and capacitive components. The reactive components of the analog filter structure are realized in the filter circuit as one-port and two-port elements having time delay, while nonreactive components of the analog filter are realized as time-delay-free one-port and plural-port elements. Interface means connect the port elements together in a configuration corresponding to the configuration of the analog ladder structure, with sets of adder and multiplier means of the interface circuitry which couple successive sets of the port elements to each other being correlated with the connective relationship (whether series, series-parallel or parallel) between the corresponding components or branches of the analog ladder structure and with the parameters of the analog components, so that the filter circuit essentially simulates the analog ladder structure in its filter characteristics.
REFERENCES:
patent: 3599108 (1971-08-01), Gardner
patent: 3619586 (1971-11-01), Hoff, Jr.
patent: 3794936 (1974-02-01), Poschenrieder
Malzahn David H.
Siemens Aktiengesellschaft
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