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单运放与双运放的优劣

大家好,最近需要对两路信号做相同的滤波处理,在器件选型时有单运放与双运放之分,在网上查了点资料说两个单运放的性能会比双运放的性能更优,只是功率和成本会大点,请问有这样的说法吗?谢谢。