| 发明名称 | Frequency mixer with compensated DC offset correction to reduce linearity degradation | ||
| 摘要 | An apparatus includes a frequency mixer circuit configured to generate a baseband signal based on a local oscillator signal and a radio frequency signal. The apparatus includes a compensation circuit configured to generate a DC offset-compensated signal based on the baseband signal, a DC offset compensation signal, and a second signal. The DC offset compensation signal and the second signal have currents approximately equal in magnitude and opposite in direction. A current of the DC offset-compensated signal is substantially the same as a current of the baseband signal. The compensation circuit may include a DC digital-to-analog converter circuit configured to generate the DC offset compensation signal and the second signal based on a control signal. | ||
| 申请公布号 | US8787503(B2) | 申请公布日期 | 2014.07.22 |
| 申请号 | US201213622014 | 申请日期 | 2012.09.18 |
| 申请人 | ViXS Systems, Inc. | 发明人 | Simmonds David |
| 分类号 | H04L25/06 | 主分类号 | H04L25/06 |
| 代理机构 | Abel Law Group, LLP | 代理人 | Abel Law Group, LLP |
| 主权项 | 1. An apparatus comprising: a frequency mixer circuit configured to generate a baseband signal based on a local oscillator signal and a radio frequency signal; and a compensation circuit configured to generate a DC offset-compensated signal based on the baseband signal, a DC offset compensation signal, and a second signal, the DC offset compensation signal and the second signal having currents approximately equal in magnitude and opposite in direction, a current of the DC offset-compensated signal being substantially the same as a current of the baseband signal. | ||
| 地址 | Toronto, Ontario CA | ||