people have always stuck to the position of Class A power amplifier

In the field of audio, people have always stuck to the position of Class A power amplifier. They believe that the sound of Class A power amplifier is the most fresh and transparent,it has a high fidelity. However, the low efficiency and high loss of Class A power amplifier are its inexorable congenital diseases. Class B power amplifier although the amplifier efficiency has improved a lot, the actual efficiency is only about 50% laptop audio system and professional super power amplifier still feel that the efficiency is low and unsatisfactory. Therefore, the efficiency Superlative because it is in line with the trend of the green revolution, it is being valued by all sides class D power amplifier Due to the development of integrated circuit technology, the very complex modulation circuits originally made of discrete components are now.
  In recent years, with the development of digital audio technology, it has been found that
and class D power amplifier digital audio has many similarities, which further shows that development advantages of class D power amplifier It is an amplification mode in which the amplifier is in the switching state. When there is no signal input, the amplifier is in the cut-off state class D power amplifier state, no power consumption. During operation, the transistor is saturated by the input signal. The transistor is equivalent to a switch that is turned on,
Connect the power supply and load directly.