Invention Grant
US09025709B2 Receiver front-end circuit, communication unit and method therefor 有权
接收机前端电路,通信单元及其方法

  • Patent Title: Receiver front-end circuit, communication unit and method therefor
  • Patent Title (中): 接收机前端电路,通信单元及其方法
  • Application No.: US14221302
    Application Date: 2014-03-21
  • Publication No.: US09025709B2
    Publication Date: 2015-05-05
  • Inventor: Chih-Fan LiaoMing-Da Tsai
  • Applicant: Mediatek Inc.
  • Applicant Address: TW Science-Based Industrial Park, Hsin-Chu
  • Assignee: Mediatek Inc.
  • Current Assignee: Mediatek Inc.
  • Current Assignee Address: TW Science-Based Industrial Park, Hsin-Chu
  • Agent Winston Hsu; Scott Margo
  • Main IPC: H04B1/10
  • IPC: H04B1/10 H04L1/00
Receiver front-end circuit, communication unit and method therefor
Abstract:
A receiver front end circuit includes a low-noise amplifier including: a first receiver path having: a first low-noise transconductor to amplify a received signal and output the amplified received signal; and a first mixer to down-convert the amplified received signal. A second receiver path includes: an auxiliary receiver having: a second transconductor to output an amplified received signal; a baseband amplifier having an input port and an output port; a first resistance coupling the input port to the output port of the baseband amplifier and to convert the amplified received signal from current to voltage and set a voltage gain of the second receiver path; and a second resistance coupled from the output port of the baseband amplifier to the first mixer output. In some examples, frequency-upconversion feedback path includes a third mixer to frequency up-convert the amplified received signal at an output of the second receiver path.
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