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. 07, 1990
Filed:
Jun. 16, 1988
Adrianus T Van Zanten, Eindhoven, NL;
Hendrikus J Veendrick, Eindhoven, NL;
Frits A Steenhof, Eindhoven, NL;
Peter H Frencken, Eindhoven, NL;
Antonius H Nillesen, Eindhoven, NL;
Cornelis G Van Der Sanden, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a memory device of the charge-coupled shift register type which is subdivided into four sections each of which has a storage capacity of, for example 208,800 bits and which can operate in different modes: parallel-in/parallel-out (as background video memory); 2.times.2 parallel-in, demultiplex/multiplex mode, for example for 100 Hz TV; scan mode; parallel-in-recirculation mode; 'shortened' memory, for example for 525-line system, etcetera. Control is realized via a decoding and timing block in which a multi-bit control word is serially input and decoded. In a scan mode (for example, as a teletext memory), the memory sections are scanned one-by-one under the control of a separate scan register in which a scan bit (logic 1) is step-wise shifted until all sections have been read. Via a data output, the scan bit is transferred, for example to the scan register of a further memory device (via its serial data input) which is connected in series with the former memory device.