Modulation apparatus for class D switching amplifier

摘要

A modulation apparatus for a class D switching amplifier is capable of reducing power consumption of an Electro-Migration Interface (EMI) of an output end and a gate driver end in a zero input signal. The modulation apparatus for a class D switching amplifier includes a control unit for detecting and outputting a control signal which is a common signal component of a first modulation signal modulated by using a first input signal and a second modulation signal modulated by using a second input signal; and is characterized by feedback of a first output signal, a second output signal and a common output signal outputted by using the first modulation signal, the second modulation signal and the control signal through an input of the modulation apparatus.

主权项

1. A modulation apparatus for a class D switching amplifier, the modulation apparatus being a modulation apparatus for a switching amplifier outputting one or more output signals using a first input signal and a second input signal, comprising:
a first modulation part for modulating the first input signal and outputting a first modulated signal; a second modulation part for modulating the second input signal and outputting a second modulated signal; and a control part for detecting and outputting a control signal that is a common signal component of the first modulated signal and the second modulated signal, wherein the control part further outputs: a first difference signal that is a difference signal between the first modulated signal and the control signal; and a second difference signal that is a difference signal between the second modulated signal and the control signal.