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加上负载前没问题,加负载芯片(运放),啸叫
HI
有没有确认运放? 例如运放芯片损坏?
确定了,运放输出正常
换了一个新的运放,还是有啸叫
用外部供电运放看看是否依旧异常?
同时如果条件允许建议你用示波器看看板子,一般电阻电容裂损也会出现啸叫的情况。