This　paper　presents　a　new　audio　signal　generation　circuit　using　sine　superposition　to　generate　audio　signal.　Compared　with　the　traditional　circuit,　the　proposed　audio　signal　waves　are　provided　by　a　waveform　conversion　method.　Besides,　the　independent　envelope　control　is　used,　which　greatly　improves　the　system　integration.　The　signal　source　is　provided　by　an　oscillator,　and　the　amplitude　is　adjusted　by　variable　gain　amplifiers.　The　phase　control　is　provided　by　the　data　selector,　the　subtraction　circuit　is　used　to　reduce　the　DC　level.　Finally　all　the　signals　are　superimposed　to　obtain　the　complete　audio　signal.　The　circuit　design　is　based　on　SMIC　0.18pm　CMOS　technology,　and　the　layout　area　is　about　0.12mm2.　The　power　supply　voltage　is　3.3V,　and　various　audio　signals　can　be　created　and　testified　in　simulation.　©　2020　IEEE.