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:
Jul. 17, 1979
Filed:
Jan. 12, 1978
James F Dubil, Warrenton, VA (US);
Alain M Falcoz, St-Jeannet, FR;
Rene J Glaise, St. Paul de Vence, FR;
Christian A Jacquart, Gattiere, FR;
Howard N Leighton, Rockville, MD (US);
Vladimir Riso, Nice, FR;
Raymond J Wilfinger, LaGrangeville, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
This specification describes a charge-transfer device transversal filter chip in which an input signal is fed in parallel into a number of channels the outputs of which are summed together to provide the desired transversal filter transfer function. Each channel contains an analog shift register, a signal splitter and a polarity selector. The shift registers are of unequal length to provide a different delay thru each channel. The signal splitter provides a plurality of signal paths thru each channel while the polarity selector determines whether a given path in a given channel is added or subtracted in the summation to determine the gain of the given channel in the summation.