The Grass Valley Group, Inc.

Dale L Leavitt

Birney D Dayton

A circuit receives an input logical signal of one polarity and converts it into two balanced logical output signals of the opposite polarity. The circuit comprises two resistors connected between a reference potential source of the polarity of the output signals and the terminals at which the output signals are provided. The circuit also comprises a current source. Each resistor has a resistance value such that when it is traversed by the current from the current source the potential difference between its ends is equal to the difference between the two possible potential levels of the output signals. A differential switching device responds to the input signal being at a first potential level by connecting one of the output terminals to the current source and isolating the other output terminal from the current source, and vice versa when the input signal is at a second potential level.

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Auburn, CA, United States of America

Dale L Leavitt