The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2003
Filed:
Oct. 02, 1998
Applicant:
Inventors:
Assignee:
Yozan, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 1/502 ; G06F 7/48 ; G06G 7/12 ;
U.S. Cl.
CPC ...
H03H 1/502 ; G06F 7/48 ; G06G 7/12 ;
Abstract
An analog calculation circuit in a filter circuit is corrected in the calculation error by estimating the error from a calculation result of known inputs and known multiplier. A multiplier is changed according to the estimated error. The filter circuit has a voltage to current converter at an input side and a current to voltage converter at an output side and a calculation of current is performed therein.