| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric power measuring part IC circuit capable of configuring a variety of watt hour meters. <P>SOLUTION: The IC circuit includes an A/D conversion circuit 11E A/D-converting two voltage signals, an A/D conversion circuit 11C A/D-converting two current signals, multiplication circuits 13e and 13r, a selection circuit 16 having selection switches 161, 162, and 163, cumulative circuits 141, 142, and 143, and a synthesizing circuit 15 synthesizing cumulative results from the respective cumulative circuits. The selection circuit 16 has an output terminal T7 outputting output from the multiplication circuit 13e to the external, an output terminal T8 outputting output from the multiplication circuit 13r to the external, an input terminal T9 inputting an external signal to the second contact of the selection switch 161 and the first contact of the selection switch, and an input terminal T10 inputting an external signal to the second contact of the selection switch 163. <P>COPYRIGHT: (C)2008,JPO&INPIT |
