| 摘要 |
PURPOSE:To directly generate a membership function from a digital value by generating positive and spare analog amounts by inputting the high-order bit of the digital value to a decoder and the low-order bit to a D/A converter, and selectively outputting the positive or spare analog amount according to the output of the decoder. CONSTITUTION:The digital value is inputted to a buffer 1, high-order bits from '6' to '8' are inputted to a decoder 3, and low-order bits from '1' to '5' are inputted to a D/A converter 2. Outputs from the low-order bits from '1' to '5' are connected to an operational amplifier OP1, and a normal analog amount N is outputted. Outputs from the low-order bits from '1' to '5' are connected to an operational amplifier OP2, and an output C in the relation of a complement is obtained. The outputs of the operational amplifiers OP1 and OP2 are respectively connected through switching element groups SN1-SN8 and SC1-SC8 to output terminals 2-9 and 1-8. Namely, the two kinds of the analog amounts having the normal value and the complement are selectively outputted by switching elements. |
