【摘要】 讨论了应用于 5GHz无线局域网 (WLAN)射频收发机的频率合成器的设计。该设计以一个 4阶II型电荷泵锁相环为基础 ,采用整数分频的频率合成方式。环路的参数首先通过系统级的建模和仿真确定 ,各电路模块使用TSMC 0 .18μmCMOS工艺设计。整个频率合成器已通过电路级仿真并交付流片。更多还原

【Abstract】 An integer-N frequency synthesizer based on a fourth-order, type-2 charge pump phase-locked loop is designed for 5 GHz WLAN radio transceivers. A high-level model is built for quick loop dynamic characterization and parameter tuning. Loop components including a low spurious charge-pump, a low noise voltage-controlled oscillator and a high speed prescaler are designed in TSMC 0.18 μm CMOS process.更多还原