一种通用宽带FM解调电路的设计  

Design of a General-Purpose Wideband FM Demodulation Circuit

作　　者：王建国[1] 叶甜春[1] 冯炳军[2] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]杭州中科微电子有限公司,杭州310053

出　　处：《微电子学》2009年第2期159-164,共6页Microelectronics

摘　　要：实现了一款可用于卫星接收系统中频段电视信号的解调电路。该芯片的设计基于BiC-MOS工艺。采用5 V电源电压供电,利用单片锁相环(PLL)实现宽带FM解调,外围器件只包括本地振荡维持网络和环路反馈元件,PLL工作频率可达800 MHz。芯片内部还集成了自动增益控制(AGC)、模拟自动频率控制(AFC)模块。该芯片具有较高的信号接收灵敏度。A general-purpose wideband FM demodulation circuit for satellite TV signal receiver systems was presented. The design was based on BiCMOS technology. Operating at 5 V supply, the circuit uses monolithic phase locked loop（PLL）for wideband FM demodulation. External components for the circuit include local oscillator sustaining network and loop feedback elements. The PLL system could operate at 800 MHz. Automatie gain control（AGC） and automatic frequency control（AFC）were also integrated into the chip. The circuit had a high receiving sensitivity.

关 键 词：FM解调 锁相环 环形振荡器 自动增益控制 自动频率控制 

分 类 号：TN431.1[电子电信—微电子学与固体电子学] TN763