| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent loss of drive power of a transistor and to speed up a switching time. <P>SOLUTION: A reference waveform Sg' consisting of a reference drive ability level voltage required for driving a junction type transistor 2, and an convolution pulse Sp consisting of a high drive ability level voltage having high driving ability, are generated. The pulse width of the convolution pulse Sp is set with a switching time of the junction type transistor 2 or with a threshold value representing the transition convergence timing of a drain potential VD. The reference waveform Sg' and the convolution pulse Sp are convoluted together, which is taken as a gate drive signal Sg of the junction type transistor 2. Since the gate drive signal Sg is switched to the reference drive ability level voltage at such timing as can be assumed to be transition completion of the junction type transistor 2, occurrence of power loss is avoided, which is accompanied by flowing of a forward current through a diode formed in the junction type transistor 2, caused by the fact that it is driven at the high drive ability level voltage even after completion of transition. <P>COPYRIGHT: (C)2012,JPO&INPIT |
