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check-FM-radio
- FM 接收机测试方法: 为了接收性能的比较及评价，作为规定测试方法。另外，ＦＭ ＭＰＸ 立体声接收机也适用于此测试方法 -FM receiver testing method : To compare the performance of the receiving and evaluation, as a required test. In addition, the FM stereo receiver MPX also apply to this test method
simplex_wireless_calling_system
- 单工无线呼叫系统分发射和接收两大部分。发射部分采用锁相环式频率合成器技术， MC145152和MC12022芯片组成锁相环，将载波频率精确锁定在35MHz，输出载波的稳定度达到4×10-5，准确度达到3×10-5，由变容二极管V149和集成压控振荡器芯片MC1648实现对载波的调频调制；末级功放选用三极管2SC1970，使其工作在丙类放大状态，提高了放大器的效率，输出功率达到设计要求。接收部分以超大规模AM/FM立体声收音集成芯片CXA1238S为主体，灵敏度、镜像抑制、信噪比等各项性能指标均达
patieVIII
- BlueCore7 is a single-chip radio and baseband IC range for Bluetooth 2.4GHz systems including enhanced data rates (EDR) to 3Mbits/s. It includes an integrated FM transmitter and receiver with stereo audio input and output stages, Bluetooth low en
CS8955_RDS
- RDS(Radio Data System)数据广播系统是将数字信号调制到调频波段 (87.5~108MHz)并以广播的形式发送的一种信号传输系统。这种传输模式在北美 和欧洲得到了采用，而且得到越来越多的其他国家的关注。在北美和欧洲 都有 相应的标准，即RBDS 和RDS。 传输数据时，数据加载到57KHz 的副载波频段。副载波经过调制以适应固定 的双相编码信号。这个副载波经过抑制以避免调制后的数据在锁相环立体声解码 器中产生混叠同时还要与德国同样采用57KHz 频率作为
pll
- Phase Locked Loops (PLL) Introduction to PLL The concept of Phase Locked Loops (PLL) first emerged in the early 1930’s.But the technology was not developed as it now, the cost factor for developing this technology was very high. Since the adva
BK1085.pdf
- Beken BK1085 64-125MHz FM stereo transmitter datasheet with register map and example schematic