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:
Apr. 28, 1998
Filed:
Jun. 02, 1997
Applicant:
Inventors:
Assignee:
Landis & Gyr Technology Innovation AG, Zug, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341143 ; 341141 ; 341159 ; 341131 ;
Abstract
In a circuit at least one of the signals (u�t! or i�t!) is transmitted to a signal input of a sigma-delta modulator operated at a first clock frequency (1/T.sub.S) the output of which is connected to at least one of two signal inputs of a multiplication/addition element (3). The arrangement is used for example in electricity counters and makes it possible to calculate sums of products by means of simple shift and algebraic adding operations while maintaining closely the precision achievable with a classic multiplication. The arrangement is especially advantageous if the multiplications are done on a semiconductor chip.