Invention Grant
US08364100B2 Method and system for a transmitter loft cancellation scheme that maintains IQ balance 有权
用于维持智商平衡的发射机顶棚取消方案的方法和系统

  • Patent Title: Method and system for a transmitter loft cancellation scheme that maintains IQ balance
  • Patent Title (中): 用于维持智商平衡的发射机顶棚取消方案的方法和系统
  • Application No.: US12792905
    Application Date: 2010-06-03
  • Publication No.: US08364100B2
    Publication Date: 2013-01-29
  • 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: Thomas|Horstemeyer, LLP.
  • Main IPC: H04B1/04
  • IPC: H04B1/04
Method and system for a transmitter loft cancellation scheme that maintains IQ balance
Abstract:
Methods and systems for a transmitter LOFT cancellation scheme that maintains IQ balance are disclosed. Aspects of one method may include providing current compensation to both differential inputs of a mixer for each of I and Q channels. An initial current compensation of X units may be provided, followed by subsequent compensation as needed. The initial compensation may be provided to each differential input of the mixers used for I and Q channels. The subsequent current compensation for the I channel may be independent of the subsequent current compensation for the Q channel. Subsequent current compensation to a first differential input for a mixer may be increased by Y units while decreasing current compensation to the second differential input of the mixer by Y units. In this manner, the DC common mode level for the mixer may remain the same at the initial DC compensation current of X units for both mixers.
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