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一种只用四块集成电路块的电路,既能测量心率又能测量呼吸率。这种双速率测量电路临床应用时性能良好。它的基本元件是一块廉价的锁相环集成电路块(4046),用来产生与输入速率成正比的线性输出信
A circuit that uses only four integrated circuit blocks that measure both heart rate and respiration rate. This dual rate measurement circuit performs well in clinical applications. Its basic component is an inexpensive phase-locked loop IC block (4046) used to generate a linear output signal proportional to the input rate