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:
Sep. 19, 1989
Filed:
Apr. 19, 1988
Applicant:
Inventors:
Leonardus C Pfennings, Eindhoven, NL;
Frits A Steenhof, Eindhoven, NL;
Assignee:
U.S. Philips Corp., New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
35821326 ; 35821325 ;
Abstract
In a one-electrode/bit SPS CCD memory, a capacity reduction can be obtained by phase shift of one or more clock voltages. For an n-phase system with N groups of n electrodes, the storage capacity can thus be reduced stepwise from at most N(n-1) bits to N(n-2) bits, etc. The stay time of the bits stored is reduced by a corresponding factor, as a result of which the clock frequency in the series registers need not be changed. By this reduction, the memory is more particularly suitable for storing television pictures both in the 625 lines system and in the 525 lines system.