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LM324用10V单电源，加入正弦波放大后饱和只有7.4V，能有办法在不改变10V电源的情况使之能放大成9V吗
亲，324带10kohm负载时的饱和压降：低压25mV，高压1.5V。所以；达到9V有困难。
建议亲选一款轨对轨放大器，这样就可以达到要求了。
关于封装，四运放一般都是14脚封装，大多管脚兼容，可以直接替换。
