论文部分内容阅读
用微机中的定时/计数器产生脉冲频率已是各种自动测量系统常用的方法之一。因为可以用软件编程实现频率的自动转换,所以这种方式广泛应用于通信、检测、自动控制等方面,尤其在智能化仪器、仪表中的应用更为突出。但如何用这种方法产生高精度正弦波、三角波一直没有获得令人满意的结果。大范围的频率变换使得用低通滤波器产生正弦波的方法无能为
Using the timer / counter in the computer to generate the pulse frequency is one of the most commonly used methods for various automatic measurement systems. Because the software can be programmed to automatically convert frequency, so this method is widely used in communications, testing, automatic control, etc., especially in intelligent instruments, instruments in the application of more prominent. However, how to generate high-precision sine wave by this method has not achieved satisfactory results. A wide range of frequency transformations make it impossible to generate a sine wave using a low-pass filter