搜索 - 科创网

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内容：引用张静茹:这个功率未必有楼主的这个芯片功率大呢我是回复的楼主：PS：求一个FM射频功放电路，用9018的那种，功率不用太大，让这个芯片输出放大一下距离覆盖达到300米就行了

内容：然而如果二本振与中射频部分ppm相差太大，积分的时间又比较长且不走运的话，是有可能恰好积分周期处于两个时钟系统的差频上的，在某些情况下，三个一中频信号积分出来的东西都很小甚至是0，此时三个信号都不显著，,如果射频部分和数字部分的时钟都是来自晶振的话，应该问题不大。

内容：采样通常有三种方案：射频直接采样、基带采样、中频采样。,射频采样是最符合软件定义无线电理念的架构，当时在HF频段射频直接采样需要相当大的动态范围，相应的产品，如SDR-IQ，成本较高但性能一般，高速ADC器件功耗通常也较大。,丰富的插件使这些软件可以适应多种多样的射频前端硬件。

约找到 1041 条结果，耗时 0.234 秒

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