精确的改进型R波复合触发电路  

A Precise and Improved Trigger Circuit of R Wave

作　　者：江迅[1] 胡佑伦[1] 史锡腾[1] 吴小林[1] 

机构地区：[1]武汉大学人民医院,武汉430060

出　　处：《中国医疗器械杂志》2004年第6期444-447,共4页Chinese Journal of Medical Instrumentation

摘　　要：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.

关 键 词：R波 触发电路 

分 类 号：R540[医药卫生—心血管疾病]