| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driver circuit that can flexibly cope with change in supply voltage. <P>SOLUTION: The driver circuit (250) includes: bridge circuits (251 to 254); and level shifter circuits (311, 313) that adjust the voltage values of driving signals and thereby generate gate driving signals (DH1, DL2, DH2, DL1) to be supplied to the gate of each transistor included in the bridge circuits. The level shifter circuits (311, 313) adjust the levels of upper-arm gate driving signals (DH1, DH2) to be supplied to the upper-arm transistor (251) according to the voltage value of variable supply voltage (VSUP). <P>COPYRIGHT: (C)2009,JPO&INPIT |
