发明授权
US07327198B2 Method and system for a polyphase clock for a second intermediate frequency (IF) mixer to improve signal quality
有权
用于第二中频(IF)混频器的多相时钟的方法和系统,以改善信号质量
- 专利标题: Method and system for a polyphase clock for a second intermediate frequency (IF) mixer to improve signal quality
- 专利标题(中): 用于第二中频(IF)混频器的多相时钟的方法和系统,以改善信号质量
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申请号: US10977872申请日: 2004-10-29
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公开(公告)号: US07327198B2公开(公告)日: 2008-02-05
- 发明人: Meng-An Pan
- 申请人: Meng-An Pan
- 申请人地址: US CA Irvine
- 专利权人: Broadcom Corporation
- 当前专利权人: Broadcom Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: McAndrews, Held & Malloy, Ltd.
- 主分类号: H03B21/02
- IPC分类号: H03B21/02 ; H04B1/26 ; H04B1/28
摘要:
Methods and systems for reducing interference in a signal are disclosed herein. Aspects of the method may comprise generating a first local oscillator signal. The generated first local oscillator signal may be phase-shifted to generate a second local oscillator signal and the second local oscillator signal may be phase-shifted to generate a third local oscillator signal. The first, second, and third local oscillator signals may be combined to generate a combined local oscillator signal, where a third harmonic and/or a fifth harmonic may be eliminated from the combined local oscillator signal. The generated second local oscillator signal may be multiplied by a factor of square root of two (√{square root over (2)}). The first and third local oscillator signals may be added to the multiplied second local oscillator signal. An input signal may be mixed with the generated combined local oscillator signal to generate a mixed output signal.
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