An adaptive offset cancellation mixer for direct conversion receivers in 2.4GHz CMOS

被引：0
|
作者：
Lehne, M [1 ]
Stonick, JT [1 ]
Moon, U [1 ]
机构：
[1] Oregon State Univ, Dept Elect & Comp Engn, Corvallis, OR 97331 USA
来源：
ISCAS 2000: IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS - PROCEEDINGS, VOL I: EMERGING TECHNOLOGIES FOR THE 21ST CENTURY | 2000年
关键词：
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper we present a new circuit design for a 2.4GHz CMOS direct conversion mixer incorporating adaptive offset cancellation. The basic circuit structure is that of a Gilbert cell mixer. Offsets are cancelled by dynamically varying the bias on the loads, which are designed to provide constant impedance independent of the load cancellation current. The bias control is regulated via an adaptive dual-loop (gear-shifting) algorithm. Performance is good when canceling offsets of any realistic magnitude. The mixer has a gain of 6.4dB, IIP3 of 17dBm and noise figure of 17dB.
引用
收藏
页码：319 / 322
页数：4
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