直接转换接收机的主动二阶互调校准

2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers Pub Date : 2006-09-18 DOI:10.1109/ISSCC.2006.1696240

Minghui Chen, Yue Wu, M. F. Chang

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引用次数: 31

摘要

采用0.25 μ m CMOS混频器制作了直接转换接收机的温度补偿有源IM2校准电路。平方电路检测射频信号并产生校准电流以消除混频器IM2失真。通过增益增强使负载效应和噪声贡献最小化。IIP2在IMT频段被从bbb20db提升到>80dbm。校准电路消耗1.5mA

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Active 2nd-order intermodulation calibration for direct-conversion receivers

A temperature-compensated active IM2 calibration circuit for direct-conversion receivers is fabricated with a mixer in 0.25mum CMOS. A squaring circuit senses the RF signal and generates a calibration current to cancel mixer IM2 distortion. The loading effect and noise contribution are minimized by gain boosting. IIP2 is boosted >20dB to >80dBm in the IMT band. The calibration circuit draws 1.5mA

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2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers

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