公开(公告)号：US08432229B2

公开(公告)日：2013-04-30

申请号：US13179653

申请日：2011-07-11

申请人： Yikui Jen Dong ,  Freeman Y. Zhong

发明人： Yikui Jen Dong ,  Freeman Y. Zhong

IPC分类号： H03B2201/025 ,  H03B2201/02

CPC分类号： H03L7/18 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/1265 ,  H03J2200/10 ,  H03L7/0891

摘要： In described embodiments, a wide toning-range (WTR) inductive-capacitive (LC) phase locked loop (PLL) provides for a large range of differing oscillation frequencies with a set of individual LC voltage controlled oscillator (VCO) paths. The output of each individual wide range LCVCO path is provided to a multiplexor (MUX), whose output is selected based on a control signal from, for example, a device controller. Each of the set of individual wide range LCVCO paths includes a switch that couples the LCVCO to a loop filter of a voltage tuning module, wherein each switch also receives the control signal to disable or enable the LCVCO path when providing the output signal from the MUX. Each switch is configured so as to minimize leakage current drawn by the LCVCO when disabled, and to reduce or eliminate effects of input capacitance of each dormant LCVCO to the loop dynamics of the PLL.

摘要翻译： 在所描述的实施例中，宽调光范围（WTR）电感 - 电容（LC）锁相环（PLL）通过一组单独的LC压控振荡器（VCO）路径提供大范围的不同振荡频率。 每个单独的宽范围LCVCO路径的输出被提供给多路复用器（MUX），其多路器（MUX）的输出是基于来自例如设备控制器的控制信号来选择的。 单个宽范围LCVCO路径中的每一个包括将LCVCO耦合到电压调谐模块的环路滤波器的开关，其中当从MUX提供输出信号时，每个开关还接收控制信号以禁用或启用LCVCO路径 。 每个开关被配置为使得禁用时LCVCO吸收的漏电流最小化，并减少或消除每个休眠LCVCO的输入电容对PLL环路动态的影响。