Invention Grant
US08401510B2 Common-gate common-source transconductance stage for RF downconversion mixer 有权
用于RF下变频混频器的共栅共源极跨导级

  • Patent Title: Common-gate common-source transconductance stage for RF downconversion mixer
  • Patent Title (中): 用于RF下变频混频器的共栅共源极跨导级
  • Application No.: US12859533
    Application Date: 2010-08-19
  • Publication No.: US08401510B2
    Publication Date: 2013-03-19
  • Inventor: Yue Wu
  • Applicant: Yue Wu
  • Applicant Address: US CA San Diego
  • Assignee: QUALCOMM Incorporated
  • Current Assignee: QUALCOMM Incorporated
  • Current Assignee Address: US CA San Diego
  • Agent Eric Ho
  • Main IPC: H04B1/26
  • IPC: H04B1/26
Common-gate common-source transconductance stage for RF downconversion mixer
Abstract:
In an embodiment, a method and apparatus for downconverting a received RF signal in a wireless device where differential signals from an off-chip matching network may be input to a CGCS input stage of a mixer, which downconverts the signals to baseband or some intermediate frequency. The input stage includes a pair of NMOS transistors in a common-gate configuration and a pair of PMOS transistors in a common-source configuration. A potential advantage of the CGCS input stage over the existing CGO transconductance stage configuration is that by adding a common-source stage through the PMOS differential-pair, the transconductance gain is decoupled from the high Q matching network.
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