DEVICE AND METHOD FOR CONVERTING AND ADDING CIRCUIT

摘要

The invention relates to a device for converting a dual rail input having two effective operand bits and two auxiliary operand bits into a one-hot coded output with three output operands. The device comprises a control device for operating said device in data mode and for operating the device in a preparation mode following said data mode. The device also comprises a logic circuit for combining the two effective operand bits and the two auxiliary operand bits so that two of the three output operands have a value differing from that of the third output operand in the data mode. The device is further configured in such a way as to bring all three output operands to the same value in the preparation mode. The conversion device can be used preferably in a three operand adder as interface between a dual-rail three bit half-adder and a sum-carry stage of a two-bit complete adder in order to achieve the same reliability as in three operand adder fully configured in dual-rail technology despite the fact that the two-bit complete adder is configured in single-rail technology.