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频率反馈环的分析

Analysis on Frequency Feedback Loop
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摘要 简单介绍了锁相环和脉冲控制锁相法的基本原理,进一步分析了锁相环的自捕捉能力、频率反馈环的构成、频差检波器的特性与参数等,结果表明用阶梯扫描加频率反馈环频率引导装置能使窄带锁相环在较短时间内在宽频率实现频率捕捉。 This paper briefly introduces the basic principles of the phase locked loop (PLL) and pulse-controlled phase locking method, and further analyses the self catching capacity of PLL, the composition of the frequency feedback loop, the features and parameters of the frequency difference detector and so on, the results of which show that the step scanning plus the frequency guide of the frequency feedback loop can make the narrowband PLL realize the frequency catching on broadband in shorter period of time.
作者 魏旭航
出处 《科技情报开发与经济》 2002年第6期131-133,共3页 Sci-Tech Information Development & Economy
关键词 信号频率 频率反馈环 频率捕捉 锁相环 脉冲控制锁相法 接收机 frequency of signal frequency feedback loop frequency catching
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