Uticor Technology, Inc.

Leo C Brower

Andrzej Kozicki

A voltage regulator circuit provides an economical approach for maintaining the RMS filament voltage of vacuum fluorescent tubes within an acceptable voltage range during input supply voltage variations. The regulator circuit includes substantially identical upper and lower clipper circuits which clip the AC voltage of a step-down transformer secondary. The supply voltage is allowed to vary so that the secondary voltage is outside of the acceptable range of voltage defined by substantially identical voltage reference circuits. Each of the voltage reference circuits is coupled to its respective clipper circuit and to the center tap of the secondary winding of the transformer so that the regulator circuit and the clipped output voltage are symmetrical about the center tap. Th regulator circuit is simple and power-efficient while keeping the filament voltage within the acceptable range of voltages.

Growing community of inventors

Davenport, IA, United States of America

Leo C Brower