发明授权
- 专利标题: Harmonic cancellation for frequency conversion harmonic cancellation
- 专利标题(中): 用于变频谐波消除的谐波消除
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申请号: US13327836申请日: 2011-12-16
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公开(公告)号: US08666352B2公开(公告)日: 2014-03-04
- 发明人: Stephen A. Jantzi , Amr M. Fahim
- 申请人: Stephen A. Jantzi , Amr M. Fahim
- 代理机构: Trellis IP Law Group, PC
- 主分类号: H04B1/26
- IPC分类号: H04B1/26
摘要:
A radio frequency (RF) receiver, such as a television tuner, includes a harmonic cancellation circuit. The harmonic cancellation circuit includes a primary signal path to generate a first intermediate frequency (IF) signal by mixing an RF signal with a reference signal and a harmonic feedforward signal path to generate a second IF signal representing signal content of the RF signal near an nth-order harmonic of a frequency fLO of the first reference signal, n comprising a positive integer. The harmonic cancellation circuit further includes a summation stage to generate a third IF signal based on a difference between the first IF signal and the second IF signal.