| 摘要 |
<P>PROBLEM TO BE SOLVED: To make reference potential higher than bus voltage having a simple circuitry, especially of a high-side gate drive circuit in an inverter adopting a bidirectional switch, in which when gate drive circuits are formed, reference potential is different between respective gate terminals. <P>SOLUTION: The gate drive circuit is applied to a half bridge circuit in which bidirectional switches 1 having four operation modes, by respectively turning on and off a first gate terminal 2 and a second gate terminal 3 that are connected in series; and the gate drive circuit includes a hold circuit 19 that keeps on the first gate terminal 2. It is possible to realize a gate drive circuit of simple circuitry, in which the first gate terminal 2 is kept on and the second gate terminal 3 is PWM-controlled, and low-loss driving can be implemented at low cost. <P>COPYRIGHT: (C)2010,JPO&INPIT |
