| 发明名称 |
VOLTAGE CONTROLLED OSCILLATOR BAND-SELECT FAST SEARCHING USING PREDICTIVE SEARCHING |
| 摘要 |
A method, an apparatus, and a computer program product are provided. The apparatus tunes a frequency provided by a VCO. The apparatus determines a relative capacitance change associated with a first frequency and a desired frequency from a look-up table. The apparatus adjusts a capacitor circuit in the VCO based on the determined relative capacitance change determined from the look-up table in order to tune from the first frequency to the desired frequency. The apparatus determines that the frequency provided by the VCO is a second frequency different than the desired frequency after adjusting the capacitor circuit. The apparatus performs an iterative search to further adjust the capacitor circuit when a difference between the second frequency and the desired frequency is greater than a threshold. |
| 申请公布号 |
US2014253255(A1) |
申请公布日期 |
2014.09.11 |
| 申请号 |
US201313790150 |
申请日期 |
2013.03.08 |
| 申请人 |
QUALCOMM Incorporated |
发明人 |
Chan Ngar Loong Alan;Yang Jeongsik;Lee Sang-Oh |
| 分类号 |
H03L7/00 |
主分类号 |
H03L7/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method of tuning a frequency provided by a voltage controlled oscillator (VCO), comprising:
determining a relative capacitance change associated with a first frequency and a desired frequency from a look-up table; adjusting a capacitor circuit in the VCO based on the determined relative capacitance change determined from the look-up table in order to tune from the first frequency to the desired frequency; determining that the frequency provided by the VCO is a second frequency different than the desired frequency after adjusting the capacitor circuit; and performing an iterative search to further adjust the capacitor circuit when a difference between the second frequency and the desired frequency is greater than a threshold. |
| 地址 |
US |
