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:
Jan. 31, 1995
Filed:
Aug. 27, 1993
Applicant:
Inventors:
Barry K Britton, Schnecksville, PA (US);
Wai-Bor Leung, Wescosville, PA (US);
Assignee:
AT&T Corp., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
326 37 ; 327407 ;
Abstract
A programmable function unit (PFU) well adapted for use in a field programmable gate array (FPGA) is disclosed. The PFU utilizes programmable fast ripple logic. A programmable generator and/or a programmable propagator are implemented in look up tables in each PFU block. A multiplexer under control of the propagator determines whether to transmit the carry in from the previous block or to transmit the generator signal.