tracking circuit

In the compensation current tracking control, the system adopts hysteresis control method of timing comparison, which can make the output current of main circuit track the directive current and limit the maximum switching frequency of the main circuit switching device.

对于补偿电流的跟踪控制，采用定时比较的滞环控制法，使得主电路的输出电流能够跟踪指令电流的变化，并且限制了主电路开关器件的最高开关频率。

IBM PC/ XT Interface and control circuit Used in Arc Welding Tracking System

用于弧焊跟踪的IBM Pc/XT接口及控制线路设计

Then the light Pen control of TV tracking window, including the principles of light pen structure, positioning, circuit structure and operation principle of tracking window position controled by light pen and some cautions in the use of light pen are described.

然后叙述数字式电视跟踪窗的光笔控制，其中包括光笔的结构和定位原理，光笔控制跟踪窗位置的电路结构及工作原理，使用光笔中要注意的问题。

The scheme accomplishes range tracking by adopting three range gate tracking to make middle gate always centered at echo pulse center through feedback circuit and deviation calculation circuit.

该方案采用三波门跟踪，通过偏差计算电路和反馈控制电路使中间波门中心始终对准目标回波脉冲中心，完成距离跟踪。

The main task of microcontroller is controlling motor working to make panel tracking the sun and monitoring the working state of charging circuit and power supply circuit, disconnecting the circuit in time when abnormal appears.

单片机控制电机转动，使得太阳能电池板跟踪太阳，并同时检测充电电路和供电电路的工作状态，当出现异常时及时断开电路。

The author also have successful designed the tracking circuit and convolution code encoder and viterbi decoder, and the simulation shows that the results are right and the module is good working.

本文还实现的码跟踪同步电路和维特比卷积码的编码器和译码器，仿真结果也证明其正确性。