【摘要】 本文介绍双通道诱发电位测试系统,其中双通道生物电放大器采用了光电耦合器和隔离型DC/DC变换器。双通道数字迭加仪采用Z80A芯片和AD7574实现A/D转换和迭加运算并行处理,采用双D/A线路实现波形、光标和字符的显示。分析时间、刺激频率和迭加次数等可用专用键修改。更多还原

【Abstract】 The design technique of a dual-channel evoked potential analysis system is presented, We use optocoupler and isolated DC/DC converter to construct physiological amplifier. ZSOA chips and AD 7574 are used in the digital averager to realize A/D conversion and addition parallelly, and a dual D/A circuit is used to display waveforms, cursors and characters on the oscilloscope. The analysis time. stimulus frequency and addition times can be modified by special key.更多还原