| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current control circuit capable of constantly optimally correcting a reference signal and outputting an appropriate current. <P>SOLUTION: The current control circuit 100 is a current correction circuit including: a reference level DAC 102 that generates a reference level for determining an output current; a superposed circuit 103 that generates a reference signal based on the reference level; an H bridge circuit 106 that supplies an output current to a load by the switching operation of multiple semiconductor devices; a current sensing circuit 107 that outputs a sense signal based on a current passed through the H bridge circuit 106; and a constant correction circuit 110 that corrects a reference signal based on the difference between a sense signal and a reference level. The constant correction circuit 110 includes a correction comparator 113 that compares a reference level with a sense signal and corrects a reference signal according to output from the correction comparator 113. <P>COPYRIGHT: (C)2007,JPO&INPIT |
