| 摘要 |
PROBLEM TO BE SOLVED: To provide a ternary logic function circuit whereby types of basic circuits for achieving all two variable ternary logic function circuits of 3<SP>3^2</SP>=19683 types can remarkably be reduced, the asymmetry of switching times can considerably be decreased, the operating speed of the logic function circuits is improved, and the symmetry of the waveform can be enhanced. SOLUTION: In the ternary logic function circuit, one-variable ternary logic function circuits C1, D1, C3, D3 conduct or interrupt three transfer gates T1, T2, T3 in response to three logical values -1, 0, 1 configuring a first input (a) to select outputs of three one-variable ternary logic function circuits B1, B2, B3 connected to a second input (b). The transfer gate T2 is configured by connecting a switch pair comprising series connection of two n-type MOS transistors in parallel with a switch pair comprising series connection of two p-type MOS transistors. COPYRIGHT: (C)2007,JPO&INPIT
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