发明授权
- 专利标题: Low-noise amplifier
- 专利标题(中): 低噪声放大器
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申请号: US11895427申请日: 2007-08-24
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公开(公告)号: US07495515B1公开(公告)日: 2009-02-24
- 发明人: Jason H. Branch , Lawrence E. Connell , Patrick L. Rakers , Poojan A. Wagh
- 申请人: Jason H. Branch , Lawrence E. Connell , Patrick L. Rakers , Poojan A. Wagh
- 申请人地址: US TX Austin
- 专利权人: Freescale Semiconductor, Inc.
- 当前专利权人: Freescale Semiconductor, Inc.
- 当前专利权人地址: US TX Austin
- 代理商 Charles W. Bethards
- 主分类号: H03F3/04
- IPC分类号: H03F3/04
摘要:
Methods and corresponding systems in a low noise amplifier include selecting a selected sub-band for amplifying, wherein the selected sub-band is one of a plurality of sub-bands, wherein each sub-band is a portion of a frequency band, and wherein each sub-band has a corresponding sub-band center frequency. Next, a gate-source capacitor is adjusted so that a real part of an LNA input impedance corresponds to a real part of a source impedance at the selected sub-band center frequency. A match capacitor is also adjusted so that the LNA input impedance corresponds to the complex conjugate of the source impedance at the selected sub-band center frequency. The gate-source capacitor and the match capacitor can each be adjusted by recalling capacitor values from memory that correspond to the selected sub-band, and connecting selected capacitor components in response to the recalled capacitor values.
公开/授权文献
- US20090051441A1 LOW-NOISE AMPLIFIER 公开/授权日:2009-02-26