(页数:16字数:4059)摘要: 简要介绍PMB 2347双环锁相频率合成器的功能、内部结构、引脚排列及典型的应用电路。PMB 2347双环锁相频率合成器一个高度集成、低功耗的芯片. 采用了高速BICMOS技术,包含了两个锁相环路。具有快速相位检测性能,高输入灵敏度以及输入频率。主要应用于一些数字通信系统如GSM、PCN(DCS 1800)及pcs系统中。
关键字: 锁相环 频率合成器 相位检测 Abstract It briefly introduced The PMB 2347 RF/IF double PLL frequency synthesizer function, internal structure, pin array and typical apply circuit. The PMB 2347 RF/IF double PLL frequency synthesizer is a highly integrated, low-cost frequency synthesizer, The device contains two PLLs with integrated prescalers.Its input sensitivity and input frequencies are very high. Primary applications are single- and dual-band digital cellular systems e.g. GSM, PCN (DCS 1800) and PCS systems.
Key word: PLL Frequency synthesizer PD
1. PMB 2347芯片简介------------------------------------------------3
2. PMB 2347芯片封装与引脚功能--------------------------------------4
3. PMB 2347内部结构与工作原理------------------------------------------------------------------8 4、PMB 2347电路描述-- ------------------------------------ -----------------------------------------10 4.1 总体描述----------------------------------------------------------------------------------10 4.2 编程 ----- --------------------------------------------------------------------------10 4.3 串行接口----------------------------------------------------------------------------------10
5、PMB 2347参数表格数据 -- -----------------------------------------------------------------------11 5.1 PMB 2347绝对最大额定值-- ---------------------------------------------------------11 5.2 PMB 2347工作范围-----------------------------------------------11 5.3 串行数据时序图--------------------------------------------------------------------------13
6. PMB 2347应用电路设计--------------------------------------------14 6.1 晶体振荡器------------------------------------------ 14 6.2 频率合成器------------------------------------------ 14 6.3 锁存检波器------------------------------------------ 14 6.4 电路板布线---------------------------------------------------- 14 7. 总结--------------------------------------------------------------------------------------------------------15
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