The gap zero code of CDA is a string intermittent and its harmful effect is that its high power consumption decrease the total operating efficience of increasing control Class D. A new method is introduced to eliminate the bad effect made by the gap zero code of CDA . A controlling circuit of gap zero code is designed. It is proved that using the switch signals formed by audio signals to control the three-variable of encoder and gate, can not only wipe out the bad effects of the gap zero code, but also eliminate the gap noise jam...
