基于晶体的300MHz450MHz的低功耗10dB的ASK、FSK无线.docVIP

课程设计 题目 基于晶体的300MHz-450MHz的低功耗+10dB的ASK/FSK无线接收机设计 学院名称 指导老师 　 班 级 学 号 学生姓名 　 二0一二年六月 基于晶体的300MHz-450MHz的低功耗+10dB的ASK/FSK无线接收机设计 摘要 该MAX1479晶体引用phase-locked-loop(PLL) VHF/UHF发射器设计传输要求，在OOK, FSK和300MHz数据450MHz频率范围.该MAX1479支持数据速率高达100kbps在ASK模式，更快，更高的耐受性传播频率，温度依赖性.这些MAX1479与MAX1470、MAX1471, MAX1473或MAX7033MAX1479采用16引脚 TQFN 封装（3mm x 3mm)，工作在至的汽车级温度范围内。 关键字： FSK ASK PIC16F819 MAX1479 发射机 Abstract The MAX1479 crystal-referenced phase-locked-loop(PLL) VHF/UHF transmitter is designed to transmit ASK,OOK, and FSK data in the 300MHz to 450MHz frequency range. The MAX1479 supports data rates up to 100kbps in ASK mode and 20kbps in FSK mode (both Manchester coded). The device provides an adjustable output power of more than +10dBm into a 50Ω load. The crystal-based architecture of the MAX1479 eliminates many of the common problems of SAW-based transmitters by providing greater modulation depth, faster frequency settling, higher tolerance of the transmit frequency, and reduced temperature dependence.These improvements enable better overall receiver performance when using the MAX1479 together with a superheterodyne receiver such as the MAX1470,MAX1471, MAX1473, or MAX7033.The MAX1479 is available in a 16-pin thin QFN package (3mm x 3mm) and is specified for the automotive temperature range from -40°C to +125°C. Key word: FSK ASK MAX1479 Transmitter 目 录 MAX1479芯片简介------------------------------------------4 1. 1 MAX1479 芯片基本资料------------------------------------------------- 1. 2 MAX1479 芯片内部框图------------------------------------------------ MAX1479的芯片封装与引脚功能------------------------------------4 2.1 MAX1479 芯片采用16脚TSSOP封装 2.2 MAX1479 的芯片封装引脚形式 2.3 引脚功能描述 2.4 MAX1479芯片主要引脚功能说明 3. MAX1479的详细说明和应用说明 3．1 详细描述--------------------------------------------------------------------------------------9 3.1.1 关断模式 3.1.2 模式选择 3.1.3 时钟输出 3.1.4 包络整形电阻 3.1.5 锁相环 3.1.6 晶体振荡器 3.1.7 功率放大器 3. 2 应用信