绝对式光电编码器精度高、位数多的特点决定其通信方式只能采取串行传输方式,且由相应的通信协议控制信息的传输。本文针对编码器主要生产厂商日本多摩川公司的绝对式光电编码器,采用FPGA设计可用于伺服驱动系统中的接口电路。 Absolute optical encoder high precision, multi-bit characteristics of the decision of its communication can only take the serial transmission mode, and the corresponding communication protocol to control the transmission of information. This paper aims at the absolute optical encoder of Japan Tamagawa Corporation, the major encoder manufacturer, and designs the interface circuit which can be used in the servo drive system with FPGA.