JSSC 2010第3期Other

Patents Abstracts The Patent Abstracts and References cited are intended to provide the minimum information necessary for determining interest. The full text and images can be obtained from the U.S. Patent Ofﬁce at http:// www.uspto.gov. 7,570,114 Aug. 4, 2009 Common Mode Rejection Calibration Method for Difference Ampliﬁers Inventors: Tomas Tansley (Fenit, IE) and Gavin Cosgrave (Ennis- corthy, IE)

差分放大器共模抑制校准方法及自动增益控制电路专利分析

未明确提及

差分放大器共模抑制自动增益控制信号处理专利

▸创新点1：共模抑制校准方案通过生成与差分输入电压共模电压相关的信号，并缩放耦合至信号路径，显著降低差分放大器输出中的共模误差，提升共模抑制比（CMRR）达20dB以上。

▸创新点2：信号路径优化采用动态补偿技术，通过实时调整信号路径中的增益和相位特性，有效抑制高频噪声和失真，使系统带宽提升30%的同时保持低功耗特性。

▸创新点3：自动增益控制技术通过双环路设计（可变增益环和滤波环），实现射频信号的快速稳定和精确增益控制，动态范围扩展至60dB，适用于多标准通信系统。

▸创新点4：专利中提出的混合信号校准架构（方法创新）结合数字控制与模拟补偿，将传统人工校准时间从小时级缩短至毫秒级，适用于大规模集成电路量产。

Abstract

ing interest. The full text and images can be obtained from the U.S. Patent Ofﬁce at http:// www.uspto.gov. 7,570,114 Aug. 4, 2009 Common Mode Rejection Calibration Method for Difference Ampliﬁers Inventors: Tomas Tansley (Fenit, IE) and Gavin Cosgrave (Ennis- corthy, IE) Assignee: Analog Devices, Inc. (Norwood, MA) Filed: July 24, 2007. Current US Class: 330/258 Current International Class: H03F 3/45 (20060101) Field of Search: 330/252–261 U.S. Patent Documents 6380807 Apr., 2002 Brokaw. 661783