【摘要】 针对一个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。其中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】 A Phase Locked Loop (PLL) Frequency Synthesizer for Digital Tuning System (DTS) is presented, which is applied to DTS of car radio receiver. In which, a format for serial data transmission and a pulse-swallow method for programmable divider are adopted. Not only the operation of MCU is simplified, but also high frequency resolution is achieved. The practical product has good market potential.更多还原