特点:·扩展了锁相环器件所能达到的最高频率·可忽略附加相位噪声·分频器运行功耗低(典型值12mA@3V)简介许多应用需要合成3GHz以上的频率,而这个范围已超过了锁相环器件能够直接产生的最高频率,但通过使用外部分频器,可以扩展锁相环的频率范围。在本文中将介绍怎样使用PE3501分频器和锁相环PE3236产生高达3.5GHz的频率。 Features: • Expands the maximum achievable frequency of PLL devices • Negligible extra phase noise • Low crossover operation power consumption (12mA @ 3V typical) INTRODUCTION Many applications require the synthesis of frequencies above 3GHz, Exceeds the maximum frequency that the PLL device can generate directly, but the frequency range of the PLL can be extended by using an external frequency divider. This article describes how to use the PE3501 divider and PLL PE3236 to generate frequencies up to 3.5GHz.