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    • 3. 发明专利
    • Direct conversion receiver architecture
    • 直接转换接收机架构
    • JP2010213310A
    • 2010-09-24
    • JP2010094023
    • 2010-04-15
    • Qualcomm Incクゥアルコム・インコーポレイテッドQualcomm Incorporated
    • LI TAOHOLENSTEIN CHRISTIANKANG INJUPWALKER BRETT CPETERZELL PAUL ECHALLA RAGHUSEVERSON MATTHEW LRAGHUPATHY ARUNSIH GILBERT C
    • H03G1/00H04B1/30H03G3/20H03G3/30H04L27/22H04L27/38
    • H03G3/3078H03G3/3068H03G3/3089
    • PROBLEM TO BE SOLVED: To provide an architecture of a direct down conversion receiver capable of providing required signal gain and DC offset correction. SOLUTION: The architecture has a DC loop for removing DC offset from a signal component, a digital variable gain amplifier (DVGA) for providing a gain range, an automatic gain control (AGC) loop for performing a gain control relating to the DVGA and an RF/analog circuit, and a serial bus interface (SBI) unit for providing control to the RF/analog circuit via a serial bus. Since these two loops perform mutual interaction with each other in design and disposition of the DVGA, an operation mode of the VGA loop is selected based on an operation mode of the DC loop. Within a time period while the DC loop is operating by a capturing mode, selection is made so as to be operated in inverse proportion to a bandwidth of the DC loop in the capturing mode. The control relating to some or all of RF/analog circuits is provided via the serial bus. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供能够提供所需信号增益和DC偏移校正的直接下变频接收机的架构。 解决方案:该架构具有用于从信号分量中去除DC偏移的直流回路,用于提供增益范围的数字可变增益放大器(DVGA),用于执行与增益范围相关的增益控制的自动增益控制(AGC) DVGA和RF /模拟电路以及串行总线接口(SBI)单元,用于通过串行总线向RF /模拟电路提供控制。 由于这两个循环在DVGA的设计和配置中彼此相互作用,所以基于DC循环的操作模式来选择VGA循环的操作模式。 在DC循环通过捕获模式操作的时间段内,选择在捕获模式中与DC环路的带宽成反比地运行。 通过串行总线提供与RF /模拟电路中的一些或全部相关的控制。 版权所有(C)2010,JPO&INPIT