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本文介绍一种用非调制的家用磁带录像机(VCR)进行生理信号记录的系统。垂直同步脉冲调制使对连续模拟信号的记录没有严重的采样失真。控制系统是由2—80A微处理机及相应的外围集成电路构成的。包括1×32KEPROM和8×64KRAM。模拟信号由多路模拟开关控制,经A/D采样后由并行数据变成串行数据,附加同步信号由录像机记录。本系统设有16个输入通道,一个通道时最大带宽为20KHz,(二
This article describes a system for recording physiological signals using a non-modulated VCR. Vertical sync pulse modulation makes continuous sampling of analog signals without serious sampling distortion. Control system is composed of 2-80A microprocessor and the corresponding peripheral integrated circuits. Including 1 × 32KEPROM and 8 × 64KRAM. Analog signal from the multi-channel analog switch control, the A / D sampling by the parallel data into serial data, the additional synchronization signal recorded by the VCR. The system has 16 input channels, a channel when the maximum bandwidth of 20KHz, (two