A fully differential amplifier topology to drive dynamic speakers in class AB mode

摘要

Circuit and method obtain a kind of new fully-differential amplifier topological structure AB communication patterns on class. In one preferred embodiment of present disclosure, the differential driving dynamic speaker. Four different feedbacks of difference intergrade (M1, M2, M3, M4, M7, M8, M9, M10) combine, (1,2, M20, M21: major cycle adjusts feedback to all shared four-roller type impedance nodes, common mode regulation is fed back, and is adjusted output stage quiescent current Liang Ge differential output stages branch (M5, M6, M11, M12).