我使用了ICL8038产生一个正弦波15KHz，幅值为+-2.8V左右，需要将幅值放大到+-12V 到+-18V左右，使用正向放大或两级反向放大都最大只能达到+-10V左右，且超过过+-7V左右会失真，波形由原来的弧形变成“山”字形。试用了两种放大器TL074（+-15V供电） LMP8674（+-20V供电）是否sr达不到。请问应如何根据参数选择器件。
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