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本期“设计实例”栏目介绍的一种低功耗仪器用的通用滤波器电路,你可以使用并行端口通过 PC 对它进行编程。这种滤波器电路不用数字式电位器而使用模拟开关和锁存器来进行数
This issue of Design Example contains a general-purpose filter circuit for low-power instruments that you can program on a PC using a parallel port. This filter circuit does not use a digital potentiometer using analog switches and latches to count