运放声源定位。如果某一时刻OUT1运放输出端电压是3.0V，则TP2电压有可能是<br/> <img src="http://jgxm-question.oss-cn-beijing.aliyuncs.com/psst/files/e814ae8f936e4cbdbcf88ff432f663e0.png?x-oss-process=image/sharpen,200"/>