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:
Jun. 14, 1977
Filed:
Nov. 06, 1975
Se J Hong, Poughkeepsie, NY (US);
Daniel L Ostapko, Poughkeepsie, NY (US);
IBM Corporation, Armonk, NY (US);
Abstract
This specification describes a decoder for a programmable logic array (PLA) having opposite ends of input lines of the array connected to outputs of different decoders. Previously two-bit decoders were arranged on opposite sides of the array to generate input variables from two sets of two different input signals each and feed those input variables to four input lines. Here, instead of using two-bit decoders, four one-bit decoders are positioned on each side. The outputs of these one-bit decoders are programmable to change the connections between them and the input lines of the array. The arrangement permits the decoders to perform one-bit, two-bit decoding on signals on the same side of the input lines, to do two-bit decoding on signals on opposite sides of the array and in combination with other sets of decoders to do three and four-bit decoding of input signals.