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文中对 2 912PCM双信道滤波电路进行了讨论 ,应用开关电容电路技术 ,将其进行变换和必要的简化。设计了集成 5 0Hz抑制滤波器电路 ,运用LM 12 4运算放大器及开关电容时域宏模型 ,开关电容的时钟频率选为 12 8kHz进行计算机模拟 ,其结果与理论计算值一致
In this paper, 2 912PCM dual-channel filter circuit is discussed, the application of switched capacitor circuit technology, to transform and simplify the necessary. The integrated 50Hz suppression filter circuit is designed. The LM 12 4 op amp and switched capacitor time-domain macromodel are designed. The clock frequency of the switched capacitor is chosen to be 12 8 kHz for computer simulation. The result is consistent with the theoretical calculation