本文所分析的锁相电路是日本佳能公司近来推出的MDD530/531型5 1/4英吋软磁盘驱动器适配器电路中的一主要部分。软磁盘驱动器作为微机系统的外部信息存贮设备得到广泛应用。因此了解驱动器电路的原理,尤其是读数据电路及锁相电路的原理,为从事微机硬件工作的人员所必需。该电路与其它型号的电路相比,有其独到之处。一、锁相电路原理图锁相技术是读写软磁盘驱动器中软盘片 The phase-locked circuit analyzed in this article is a major part of the recently introduced Canon MDD530 / 531 5 1/4 "floppy disk drive adapter circuit. Soft disk drives are widely used as external information storage devices in microcomputer systems. So understand the principle of the driver circuit, especially the principle of reading data circuits and phase-locked circuits, for personnel engaged in the work of computer hardware necessary. The circuit compared with other types of circuits, has its own uniqueness. First, the phase-locked circuit schematic lock phase technology is to read and write floppy disk drive floppy disk