This design applied degenerative feedback closed loop control system. The MCU compared real-time the preset value with the measuring results, and adjusted the settings, in order to advanced the output precision of the current generator. 采用负反馈闭环控制系统,单片机实时将预置值和实测值进行比较、调整控制,提高了电流源的输出精度。
Carrier synchronization is implemented by a kind of closed loop with degenerative feedback. Frequency tracking and phase tracking are two different classes of carrier tracking loop. 载波同步通常采用一种闭环反馈回路来对载波相位进行跟踪。