Negation

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NEGATION. Denial. Two negations are construed to mean one affirmation. Dig. 50, 16, 137.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
If a negative logic configuration is required, a level shifter is needed to invert the output to the negative voltage logic.
All models feature trimmable output voltage, remote sense and remote ON/OFF facility as standard which can be specified with either positive or negative logic. The QEB Series uses active clamp and resonant technology resulting in efficiencies in excess of 90 percent.
In addition to remote ON/OFF capability, each has an option for negative logic control.
Standard features for both the KHQ030 and KHQ040 include 2 million hours demonstrated MTBF, remote on/off with positive or negative logic, remote sense, and an output voltage adjustment of [+ or -] 10 percent.