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    • 2. 发明公开
    • 적응적 연속-시간 필터를 조절하기 위한 위상-고정 루프 기반 제어기
    • 用于调节自适应连续过滤器的相位锁定环路控制器
    • KR1020100016655A
    • 2010-02-12
    • KR1020097024004
    • 2008-04-18
    • 스카이워크스 솔루션즈, 인코포레이티드
    • 유쏘피안,에드워드야테스,데이비드이즈마일,앨리,엠.해처,제프리
    • H04B1/16
    • H03H21/0012H03H11/1291H03H2210/021H03H2210/043H03J2200/10
    • A direct conversion radio-frequency (RF) receiver includes a controller and an adaptive continuous-time filter. The adaptive continuous-time filter receives a multiple-bit control signal generated by the controller to adjust a characteristic of the continuous-time filter. The controller generates the multiple-bit control signal in response to process variation in the semiconductor material used to implement the controller and the adaptive continuous-time filter. A method for tuning an adaptive continuous-time filter comprises determining a RC time constant, converting the RC time constant to a digital word, comparing a select bit of the digital word to a respective bit of a predetermined reference word to generate a control bit, applying the control bit to an adjustable element to modify the RC time constant, repeating the determining, converting, comparing and applying steps until the control bits generate an output word and providing the output word to the adaptive continuous-time filter.
    • 直接转换射频(RF)接收机包括控制器和自适应连续时间滤波器。 自适应连续时间滤波器接收由控制器产生的多位控制信号,以调整连续时间滤波器的特性。 响应于用于实现控制器和自适应连续时间滤波器的半导体材料中的工艺变化,控制器产生多位控制信号。 一种用于调整自适应连续时间滤波器的方法包括:确定RC时间常数,将RC时间常数转换为数字字,将数字字的选择位与预定参考字的相应位进行比较以产生控制位, 将控制位应用到可调元件以修改RC时间常数,重复确定,转换,比较和应用步骤,直到控制位产生输出字并将输出字提供给自适应连续时间滤波器。