【摘要】 针对汽车音响收音数字调谐系统的实例,介绍了一种广播用双波段锁相环频率合成芯片的设计方法。设计采用串行端口按位传输数据的方式,在程序分频器部分使用了吞脉冲技术,不仅简化了控制器的操作,同时也获得了较高的频率分辨力,实际产品具有广泛的市场前景。更多还原

【Abstract】 We present a phase locked loop (PLL) frequency synthesizer for digital tuning system (DTS), which is used for DTS of car radio receiver. We use a mode of serial transmission data and a pluse-swallow method in programmable divider. The operation of MCU has been simplified, and at the same time this method receives high frequency resolution. The practical product has good market applied prospect.更多还原