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:
Nov. 10, 1992
Filed:
Apr. 01, 1992
William A Lagoni, Indianapolis, IN (US);
Roger L Lineberry, Indianapolis, IN (US);
Thomson Consumer Electronics, Inc., Indianapolis, IN (US);
Abstract
Apparatus for separating sync and video includes a luminance signal coupling capacitor, a keyed clamp circuit coupled to a source of back porch keying pulses for clamping a back porch interval of the composite luminance signal to a reference direct voltage level, and signal clipping means comprising at least one voltage follower amplifier device and a threshold biasing semiconductor device of the same conductivity type as the voltage follower amplifier connected to the output electrode of the voltage follower, such that the biasing device maintains the voltage follower in cutoff conduction condition for signals of one polarity with respect to the reference voltage while producing a predetermined direct voltage output across a load resistance and for allowing coupling of signal components of opposite polarity with respect to the direct voltage level to a utilization device.