Invention Grant
US07907921B2 Wireless transmitter having multiple power amplifier drivers (PADs) that are selectively biased to provide substantially linear magnitude and phase responses 有权
具有多个功率放大器驱动器(PAD)的无线发射器被选择性地偏置以提供基本线性的幅度和相位响应

  • Patent Title: Wireless transmitter having multiple power amplifier drivers (PADs) that are selectively biased to provide substantially linear magnitude and phase responses
  • Patent Title (中): 具有多个功率放大器驱动器(PAD)的无线发射器被选择性地偏置以提供基本线性的幅度和相位响应
  • Application No.: US12457542
    Application Date: 2009-06-15
  • Publication No.: US07907921B2
    Publication Date: 2011-03-15
  • Inventor: Meng-An Pan
  • Applicant: Meng-An Pan
  • Applicant Address: US CA Irvine
  • Assignee: Broadcom Corporation
  • Current Assignee: Broadcom Corporation
  • Current Assignee Address: US CA Irvine
  • Agency: Sterne, Kessler, Goldstein & Fox, P.L.L.C.
  • Main IPC: H01Q11/12
  • IPC: H01Q11/12 H04B1/04
Wireless transmitter having multiple power amplifier drivers (PADs) that are selectively biased to provide substantially linear magnitude and phase responses
Abstract:
A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second power amplifier drivers (PADs) having respective first and second non-linear phase responses. The first non-linear phase response is based on a first bias applied to the first PAD, and the second non-linear phase response is based on a second bias applied to the second PAD. The first and second PADs are coupled in parallel to provide a combined substantially linear phase response. According to an embodiment, the first and second PADs have respective first and second average input capacitances. Signal swings about the first and second biases vary the respective first and second average input capacitances, which may be combined to provide a combined average input capacitance that is substantially insensitive to the signal swings about the first and second biases.
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