发明授权
- 专利标题： Local oscillator leakage control in direct conversion processes
- 专利标题（中）： 直接转换过程中的本地振荡器泄漏控制
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申请号： US10020607申请日： 2001-12-10
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公开(公告)号： US06960962B2公开(公告)日： 2005-11-01
- 发明人: Paul E. Peterzell , David Maldonado , Kevin Gard , Puay Hoe See , Jeremy Dunworth , Gurkanwal Sahota
- 申请人： Paul E. Peterzell , David Maldonado , Kevin Gard , Puay Hoe See , Jeremy Dunworth , Gurkanwal Sahota
- 申请人地址： US CA San Diego
- 专利权人： Qualcomm Inc.
- 当前专利权人： Qualcomm Inc.
- 当前专利权人地址： US CA San Diego
- 代理商 Philip R. Wadsworth; Charles D. Brown; George C. Pappas
- 主分类号： H03L7/183
- IPC分类号： H03L7/183 ; G01N33/14 ; H03D3/00 ; H04B1/30 ; H04B1/40 ; H03B21/01 ; H03L7/00 ; H04B1/00
摘要：
A system and method for generating a local oscillator (LO) frequency in a zero intermediate frequency (IF) receiver or transmitter is presented. A signal is received from a voltage controlled oscillator (VCO). The signal has a VCO frequency. The VCO frequency is divided by a number N to produce a signal having a divided-down frequency. The signal having the VCO frequency is then mixed with the signal having the divided-down frequency to produce an output signal having an output frequency. Local oscillator leakage is reduced. Thus, the receiver or transmitter may operate in multiple wireless communication bands and modes and meet the associated specifications.
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