基本信息:
- 专利标题： LOCAL OSCILLATOR LEAKAGE DETECTING AND CANCELLATION
- 申请号：US16954374 申请日：2017-12-18
- 公开(公告)号：US20200382060A1 公开(公告)日：2020-12-03
- 发明人： Joakim Hallin
- 申请人： Telefonaktiebolaget LM Ericsson (publ)
- 申请人地址： SE Stockholm
- 专利权人： Telefonaktiebolaget LM Ericsson (publ)
- 当前专利权人： Telefonaktiebolaget LM Ericsson (publ)
- 当前专利权人地址： SE Stockholm
- 国际申请： PCT/SE2017/051291 WO 20171218
- 主分类号： H03D7/16
- IPC分类号： H03D7/16
摘要：
A mixer circuitry comprises a mixer, a local oscillator (LO) leakage detector, a digital LO leakage cancellation controller and a DAC arrangement. The mixer is configured to mix a first LO signal having an LO frequency fLO with an intermediate frequency (IF) signal and generate an output signal, i.e. a wanted signal. The LO leakage detector measures the LO leakage at the output of the mixer in the presence of the wanted signal. Then in the digital LO leakage cancellation controller, a digital algorithm is run that automatically adjusts the LO leakage in the mixer by steering the digital-to-analog converter arrangement such that the intermediate frequency input signal level to the mixer is adjusted.
公开/授权文献:
- US11012162B2 Local oscillator leakage detecting and cancellation 公开/授权日：2021-05-18
IPC结构图谱:
| H | 电学 |
| --H03 | 基本电子电路 |
| ----H03D | 由一个载频到另一载频对调制进行解调或变换 |
| ------H03D7/00 | 从一个载频到另一载频调制的变换，例如频率变换 |
| --------H03D7/16 | .多重频率变换 |