| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent malfunction due to a parasitic current generated in a control part for controlling a high-side power element. <P>SOLUTION: In a drive circuit, a high-side control part 1 of a motor driver 30 is provided with an amplifying part 11, a drive part 12, and a Pch MOS transistor PM6. The Pch MOS transistor PM6 is provided between the amplifying part 11 and the drive part 12. Its source is connected to a high-potential side power supply Vdd, its gate is connected to a node N3 and its drain is connected to a node N1 and a gate of a Pch MOS transistor PM3. When the signal levels of complementary signals Sina and Sinb inputted to the control part 1 change, the Pch MOS transistor PM6 functions as a parasitic-current absorbing means for absorbing a parasitic current generated in the control part 1. <P>COPYRIGHT: (C)2009,JPO&INPIT |
