监护仪用ECG放大电路的研制

The design of ECG amplifier for clink monitors

介绍一种监护仪使用的 3导联ECG放大电路.它具有电极脱落自动检测电路和起搏器检测电路,由微机程控实现导联切换、消除过驱动、选择频带范围以及灵敏度.它采用三隔离技术(心电信号、数控信号、电源隔离),以确保病人安全.

A 3-lead ECG amplifier for clinic monitors is introduced. It is furnished with auto-detection of lead fault and pace-maker detection function, and is controlled by a personal computer, which manipulate the lead selector, overdriving elimination circuit, the gain and the frequency range of filter. The circuit also adopted three kinds of isolation technique (namely, isolated ECG signal with A/D converter, isolated PC pulse signal with the patients, and isolated power supply) to secure the patients.