摘要 |
In a circuit driving a capacitive load Cp, current passed through a transistor Q<HIL><PDAT>3</BOLD><PDAT>, a diode D<HIL><PDAT>1 </BOLD><PDAT>and a recovering coil L is passed through lines L<HIL><PDAT>1</BOLD><PDAT>, L<HIL><PDAT>2</BOLD><PDAT>, and the inductance components of the lines L<HIL><PDAT>1 </BOLD><PDAT>and L<HIL><PDAT>2</BOLD><PDAT>, and the drain-source capacitances of the transistors Q<HIL><PDAT>1 </BOLD><PDAT>and Q<HIL><PDAT>2 </BOLD><PDAT>generate LC resonance. Capacitors C<HIL><PDAT>1 </BOLD><PDAT>and C<HIL><PDAT>2 </BOLD><PDAT>are connected in parallel to the drain-source regions of the transistors Q<HIL><PDAT>1 </BOLD><PDAT>and Q<HIL><PDAT>2 </BOLD><PDAT>to increase the total drain-source capacitance and reduce the resonance frequency, so that unwanted electromagnetic wave radiation in a frequency band affecting other electronic devices is suppressed.</PTEXT> |