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:
Dec. 05, 1978
Filed:
Dec. 20, 1977
Harry N Gardner, Colorado Springs, CO (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A CCD (charge coupled device) RAM (random access memory) includes a plurality of 'rings' of serially connected CCDs in which digital information recirculates. A combinational decoder selects one of the plurality of rings by decoding a first group of binary address inputs. Each ring includes a plurality of input/output circuits coupled to associated 'taps', each tap being coupled between an input and an output of a CCD regeneration cell. An address addition circuit includes a counter which counts at the same rate that data shifts through each of the rings and has a plurality of taps spaced at the same intervals (numbers of intervening CCD cells) as the taps in each of the rings. The counter outputs are decoded to provide a first internal address corresponding to the location of a fictitious tag bit in a ring with reference to an initial reference bit in a ring.