Staas & Halsey
Majority logic circuit
 A logic circuit including a transistor having a control electrode connected to three input terminals at which are received three respective input signals, each having, selectively, either a high or a low voltage level, and first and second electrodes, one thereof connected to a first power supply potential and the other thereof connected through a diode having N-type negative differential resistance to a second, lower power supply potential. An output terminal is connected to one of the first and second electrodes of the transistor for deriving an output signal. The load lines of the transistor are set to a first operating point for both a first condition in which all three input signals are at a low voltage level and also a second condition in which two thereof are at a high level and the third is at a low level, and to a second operating point for both a third condition in which only one of the input signals is at the high level and the remaining two input signals are at the low level and also a fourth condition in which all of the three input signals are at the high level. The current conducted by the transistor is at a first level for the first operating point and at a second level, greater than the first level, for the second operating point. 
Fujitsu Limited
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H03K H03K G06F G06F H03K
inventional inventional inventional additional inventional
Toshihiko Motomu
Mori Takatsu