公开(公告)号：US07746179B1

公开(公告)日：2010-06-29

申请号：US11900691

申请日：2007-09-12

申请人： David Walker ,  Nathaniel King, Jr. ,  Robert Koupal

发明人： David Walker ,  Nathaniel King, Jr. ,  Robert Koupal

IPC分类号： H03L7/00

CPC分类号： H03L7/099 ,  H03L7/0891 ,  H03L7/113 ,  H03L7/18

摘要： A method and apparatus for selecting an optimum VCO from an array of VCOs is disclosed. Each VCO in the array has an output range and a limit. In one embodiment, a search set of VCOs is designated as all VCOs in a system. The limit is compared to a tuning value which corresponds to a desired calibration frequency. The comparison divides the array of VCOs into a searched set and a non-searched set. The process is repeated until the non-searched set comprises only one VCO. In another embodiment, the VCOs are ordered such that there is a middle VCO. A VCO in the middle of the array is selected. The limit of the middle VCO is compared to a tuning limit. Based on the comparison, another VCO is selected. The process repeats N times, where N is the logarithm, base 2, of the total number of VCOs to be searched. at the end of the search, an optimum VCO will be found.

摘要翻译： 公开了一种从VCO阵列中选择最佳VCO的方法和装置。 阵列中的每个VCO都具有输出范围和限制。 在一个实施例中，将VCO的搜索集合指定为系统中的所有VCO。 将极限与对应于所需校准频率的调谐值进行比较。 该比较将VCO的阵列划分为搜索集和未搜索的集合。 重复该过程，直到未搜索的集合仅包括一个VCO。 在另一实施例中，VCO被排序成使得存在中间VCO。 选择阵列中间的VCO。 将中间VCO的极限与调谐限制进行比较。 基于该比较，选择另一个VCO。 该过程重复N次，其中N是要搜索的VCO的总数的对数，基数2。 在搜索结束时，将找到最佳的VCO。