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心律紊乱和心脏骤停是心血管疾病和内、外科危重症的重要诊断指标和抢救指标。为准确及时地掌握病人的心律,国內外已有越来越多的医疗单位应用心电遥测技术。目前国际上在无线心电遥测中流行FM/FM(双调频调制)、PDM(矩形波脉冲宽度调制、调频发射)、PCM(脉冲编码调制、调频发射)这三种制式。前两种制式电路简单,抗干扰力较强;后一种制式精度高,但价格昂贵。上述三种
Cardiac arrhythmias and cardiac arrest are important diagnostic and rescue indicators of cardiovascular disease and critical surgery and internal medicine. In order to accurately and timely grasp the patient’s heart rhythm, more and more medical units at home and abroad have applied ECG telemetry. Currently in the world of wireless ECG telemetry FM / FM (dual FM modulation), PDM (rectangular wave pulse width modulation, FM transmitter), PCM (pulse code modulation, FM transmitter) these three formats. The first two kinds of standard circuit is simple, strong anti-interference; the latter a high precision, but expensive. The above three