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:
Jul. 18, 1989
Filed:
Nov. 19, 1987
Applicant:
Inventor:
Jozef J Hulshof, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; H01J / ;
U.S. Cl.
CPC ...
307261 ; 307262 ; 307268 ; 307246 ; 328187 ; 315368 ; 315371 ;
Abstract
A circuit for supplying a periodic, essentially parabolic signal by squaring a sawtooth-shaped signal. For eliminating a disturbance occurring during the retrace period, a signal is generated during this period whose polarity is opposite to that of the parabolic signal occurring during the trace period, both the generated signal and the derivative with respect to time of this signal assuming values at the start and end of the retrace period which are substantially equal to the corresponding values at the same instants of the essentially parabolic signal occurring during the trace period, and of the derivative with respect to time of this signal.