| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the performance of a D-A converter. <P>SOLUTION: A DAC is provided with a memory mat including a plurality of first memory cells and a plurality of output lines connected to the memory cells. In the DAC, the memory cells each have a first memory section including a bipolar transistor and storing information in a nonvolatile way depending on whether or not the junction of the bipolar transistor is destroyed; and a second memory section connected to the first memory section and outputting the information to any corresponding one of the output lines. The memory cell each have a first mode for transferring the information from the first memory section to the second memory section and a second mode for specifying the second memory section from the outside and writing the information when writing the information into the second memory section. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
