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一个正弦波振荡器的反馈系数 1374141211093.jpg ,若该振荡器能够维持稳定振荡,则开环电压放大倍数 1374141261796.jpg必须等于(  )。

单选题
2022-04-02 17:22
A、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/9e8dbbe6-e808-4cf9-b8c2-9a0cf3fa4b63.jpg"title="1374141284953.jpg" alt="1374141284953.jpg"/>
B、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/ac953120-da16-4f8d-aaf0-7689d45b63ba.jpg"title="1374141299515.jpg" alt="1374141299515.jpg"/>
C、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/f87770bc-fe07-4f38-bfbe-2f0a99f40228.jpg"title="1374141311656.jpg" alt="1374141311656.jpg"/>
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正确答案
C

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