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. 05, 1980
Filed:
Apr. 03, 1978
Applicant:
Inventor:
Leonardus A Valkestijn, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307268 ; 307230 ; 307246 ; 307261 ; 328187 ;
Abstract
A circuit for producing a periodic parabolic signal by means of squaring a sawtooth-shaped signal, for example for controlling an east-west modulator in color television receivers, a parabolic disturbance occurring during the retrace period being reduced by means of a transistor amplifier operating as an emitter follower during the trace period and as a switch during the retrace period.