发明授权
US06973297B1 Method and apparatus for down-conversion of radio frequency (RF) signals with reduced local oscillator leakage
有权
降低本地振荡器泄漏的射频（RF）信号的下转换方法和装置
- 专利标题： Method and apparatus for down-conversion of radio frequency (RF) signals with reduced local oscillator leakage
- 专利标题（中）： 降低本地振荡器泄漏的射频（RF）信号的下转换方法和装置
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申请号： US10070012申请日： 2000-09-01
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公开(公告)号： US06973297B1公开(公告)日： 2005-12-06
- 发明人: Tajinder Manku , Lawrence Wong , Yang Ling
- 申请人： Tajinder Manku , Lawrence Wong , Yang Ling
- 申请人地址： CA
- 专利权人： Sirific Wireless Corporation
- 当前专利权人： Sirific Wireless Corporation
- 当前专利权人地址： CA
- 代理机构： Townsend and Townsend and Crew LLP
- 优先权： CA2281236 19990901
- 国际申请： PCT/CA00/00994 WO 20000901
- 国际公布： WO01/17120 WO 20010308
- 主分类号： H03D3/00
- IPC分类号： H03D3/00 ; H03D7/16 ; H04B1/00 ; H04B1/04 ; H04B1/30 ; H04B1/26
摘要：
This patent describes a method of removing the LO-leakage and 1/f noise problems associated with direct conversion RF receivers and other demodulators. In order to solve this problem a virtual LO™ signal is generated within the RF signal path which is tuned to the incoming RF signal. The virtual local oscillator (VLO) signal is constructed using signals that do not contain a significant amount of power (or no power at all) at the LO frequency. Any errors in generating the virtual LO signal are minimized using a closed loop correction scheme.
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