| 发明名称 | Auto frequency calibration for a phase locked loop and method of use | ||
| 摘要 | An apparatus comprises a code generator configured to generate a coarse tuning signal and a reset signal based on a reference frequency and a phase difference signal. The apparatus also comprises a digital loop filter configured to generate a fine tuning signal based on the phase difference signal. The apparatus further comprises a voltage control oscillator configured to generate an output signal based on the coarse tuning signal and the fine tuning signal. The apparatus additionally comprises a divider configured to generate a divider frequency based on a divider control signal and the output signal. The phase difference signal is based, at least in part, on the divider frequency, and the divider is configured to be reset based on the reset signal. | ||
| 申请公布号 | US9490819(B2) | 申请公布日期 | 2016.11.08 |
| 申请号 | US201514603900 | 申请日期 | 2015.01.23 |
| 申请人 | TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD. | 发明人 | Chen Yen-Jen;Kuo Feng Wei;Chen Huan-Neng;Jou Chewn-Pu |
| 分类号 | H03L7/06;H03L7/08;H03L7/10;H03L7/197;G04F10/00;H03L7/085;H03L7/099;H03M1/00 | 主分类号 | H03L7/06 |
| 代理机构 | Hauptman Ham, LLP | 代理人 | Hauptman Ham, LLP |
| 主权项 | 1. An apparatus comprising: a code generator configured to generate a coarse tuning signal and a reset signal based on a reference frequency and a comparison of a phase difference signal with a base-line signal; a digital loop filter configured to generate a fine tuning signal based on the phase difference signal; a voltage control oscillator configured to generate an output signal based on the coarse tuning signal and the fine tuning signal; and a divider configured to generate a divider frequency based on a divider control signal and the output signal, wherein the phase difference signal is based, at least in part, on the divider frequency, and the divider is configured to be reset based on the reset signal. | ||
| 地址 | TW | ||