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:
Aug. 25, 1987
Filed:
Jul. 06, 1984
Driss Anouar, Paris, FR;
Jean-Francois Hamelin, Chatou, FR;
Electricite de France, , FR;
Abstract
To analyze and restore an analog signal by sampling at a frequency between 2.5 and five times the band of the signal and by interpolation, the signals sampled at the rate (F.sub.e) is subjected to low pass filtering for isolating the signal band B, then to an interpolation in several steps each leading to multiplication of the samples by inserting zeros between the available samples and by subjecting the new set of samples obtained to digital low pass filtering. The installation for this may comprise an input filter, an A/D converter and an interpolater. The filter isolates the band of the signal then the interpolater operates in several steps each leading to multiplication of the samples by inserting zeros between the available samples and by subjecting the new set of samples obtained to digital low pass filtering.