| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device capable of configuring a drive circuit for almost simultaneously switching a plurality of power MOS transistors provided in parallel connection at the output stage of a class-D amplifier. SOLUTION: A non-inverting pulse signal and an inverting pulse signal that are PWM-modulated inside the class D amplifier are applied to first and second input terminals. Input parts of a comparator are connected to the first and second input terminals, an output part of the comparator is connected to a first output terminal, an input part of a buffer is connected to a third input terminal, and its output part is connected to a second output terminal. Any gate of a plurality of the power MOS transistors provided in parallel connection to the output stage of the class D amplifier is connected to the second output terminal. The drive circuit is configured by using semiconductor devices 303H to 303HC, and 303LA to 303LC with the configuration above. COPYRIGHT: (C)2004,JPO
|
