精确的改进型R波复合触发电路

A Precise and Improved Trigger Circuit of R Wave

介绍了一种用R波的一阶及二阶微分复合触发的改进型电路,为使最大范围(0.3-4伏)的R波触发更准确,采用了改进后的硬件型自动增益控制部分,在原电路中又加入了带通滤波部分,降低了大T波的误触发。经实验证实,该电路触发点准确,具有更高的时相精度、宽的触发范围和很好的稳定性。

This paper introduces an improved trigger circuit, which uses a combination of one-order/two-order derivative of R wave to trigger. In this revised circuit, the hardware in order to make the R wave to trigger with max amplitude around 0.3-4 volt, automatic gain control (AGC), and the band-pass filter, which decrease the incidence of false trigger of T wave are used. It is confirmed by the experiments that this revised circuit has an accurate trigger point, wider range, higher preciseness of time-phase and better stability.