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TI的DRV8xxx系列会比较合适，外围简单元件数量少，性能与同级别分立驱动器相当。DRV8312 三路半桥输出 50V 3.5A 导通内阻80mOhm。H桥驱动器小电流可用L9110。不需要外围电路...

楼主厉害！不知道用的F4是不是208脚的，少于208脚的F4芯片的SDRAM只有16位而不是32位，LTDC+DMA2D的时钟也只有45M而不是70M，按安富莱那边的测试，32位SDRAM刷屏速度快2...

RTL-SDR的结构如图, 虽然是零中频的结构但是只使用了一个I通道,所以是有镜像频率产生的.中心频率振幅的变化应该是开启了硬件AGC方面设置.我使用RTLSDR直采接收短波是没有这种现象的

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