The Grass Valley Group, Inc.

Gerald Graham Taylor

Bruce L Rayner

A buck regulator circuit including an inductance is provided with an input current via a pass transistor and a second transistor disposed in drive relation to the pass transistor. The second transistor supplies current to the inductance at a tapped connection so the second transistor may drive the first transistor at a voltage level sufficiently high for saturating the first transistor.

Regulator circuit

A special effects generator for use in video switching whereby a three dimensional shadow effect is produced by utilizing luminance information separately derived from RGB color inputs and providing a separate multiplier to control the shadow density. The generator functions by controllably blanking a portion of one video signal and then replacing such portion by another video signal and switching the displayed video linearly, said switching being controlled by color differences in one of the video signals, and providing luminance information derived from one video signal as a control signal for application to the other video signal so as to reduce the level thereof.

Growing community of inventors

Nevada City, CA, United States of America

Gerald Graham Taylor