Frenger P
Working Hypothesis, Inc., Houston, TX 77282-0506.
Biomed Sci Instrum. 1991;27:227-30.
This design allows generation of a wide range of waveforms from subaudio to ultrasonic directly via software. Waveforms may be calculated on the fly by suitable algorithms or produced from previously created lookup tables. The heart of the design is a fast 16-bit processor which directly executes the Forth programming language. A simple R/2R digital-to-analog converter is coupled to a parallel output port to produce the desired waveforms. This device has been used to generate realistic-appearing normal and abnormal EKG tracings in the lab.
这种设计允许通过软件直接生成从亚音频到超声波的各种波形。波形可以通过合适的算法即时计算得出，也可以从预先创建的查找表中生成。该设计的核心是一个直接执行Forth编程语言的快速16位处理器。一个简单的R/2R数模转换器与一个并行输出端口相连，以产生所需的波形。该设备已被用于在实验室中生成外观逼真的正常和异常心电图描记图。
