MODULATION APPARATUS FOR A CLASS D SWITCHING AMPLIFIER CAPABLE OF REDUCING EMI FROM A OUTPUT TERMINAL AND POWER CONSUMPTION IN A GATE DRIVER TERMINAL

摘要

PURPOSE: A modulation apparatus for a class D switching amplifier is provided to control a proper signal level and timing by using a first modulated signal, a second modulated signal, and a control signal of a control unit.;CONSTITUTION: A modulation apparatus(200) for a switching amplifier outputs one or more output signals by using a first input signal and a second input signal. The modulation apparatus for the switching amplifier comprises a first modulation unit(210a) which outputs a first modulated signal by modulating the first input signal. The modulation apparatus for the switching amplifier outputs a second modulated signal by modulating the second input signal. A control unit(220) detects a control signal which is a common signal factor of the second modulated signal and the first modulated signal. The first output signal, the second output signal, and a common output signal get feedback by the input of the modulation apparatus.;COPYRIGHT KIPO 2013