Filter adjustment apparatus and method

Details Filter adjustment apparatus and method Filter adjustment apparatus and method

1987-12-24

1989-06-20

Lall, Parshotam S.

Boots, shoes, and leggings

328167, 330294, 36457101, 36472402, 375 13, G06F 738, H03F 134

Patent

active

048414611

ABSTRACT:
A filter adjustment apparatus adjusts the properties of a filter by changing, for example, the circuit constants of a filter connected in series with a signal processing circuit to correspond with desired optimum properties of the filter. The state of the signal processing circuit is changed to a state not affecting the filter adjustment, to thereby eliminate the influence of the signal processing circuit on the filter characteristics, to facilitate and increase precision of the filter adjustment.

REFERENCES:
patent: 4301420 (1981-11-01), Sugawara
patent: 4320517 (1982-03-01), Godard et al.
patent: 4339729 (1982-07-01), Jason et al.
patent: 4438406 (1984-03-01), McCormick et al.
patent: 4513254 (1985-11-01), Harr
patent: 4554514 (1985-11-01), Whartenby et al.
patent: 4745622 (1988-05-01), Gupta
patent: 4768205 (1988-08-01), Nakayama

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