用于汽车雷达的76-81GHz高线性CMOS接收机前端

2018 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA) Pub Date : 2018-11-01 DOI:10.1109/CICTA.2018.8705711

Zongming Duan, Dongfang Pan, Yan Wang, Bingbing Liao, Yuefei Dai, F. Lin

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引用次数: 0

摘要

76-81 GHz接收机(Rx)前端在65纳米的COMS中实现，用于汽车雷达。前端由低噪声放大器(LNA)、带两级变压器的级间网络和带跨导(Gm)级和四开关的混频器铁芯组成。三级共源LNA采用反激变压器反馈技术。传统的吉尔伯特混合器通过在Gm级和开关级之间插入变压器平衡器来改进。因此，可以实现高线性性能。Rx前端功耗为22mW, 80ghz时输入1dB压缩点(P1dB)为- 15.5 dBm。76 ~ 81 GHz时的转换增益(CG)为8.5 ~ 11.5 dB，噪声系数为7.2 ~ 8.7 dB。除去pad，芯片尺寸仅为0.23 mm2。

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A 76-81GHz High-linearity CMOS Receiver Front-end for Automotive Radar

a 76-81 GHz receiver (Rx) front-end is implemented in 65-nm COMS for automotive radar. The front-end consists of a low noise amplifier (LNA), an interstage network with two-stage transformer, and a mixer core with transconductance (Gm) stage and quad-switch. Flyback transformer-feedback technique is adopted for the three-stage common source (CS) LNA. Traditional Gilbert-mixer is improved by inset a transformer balun between Gm stage and switch stage. Therefore, high-linearity performance can be achieved. The Rx front-end consumes 22mW and the input 1dB compression point (P1dB) is - 15.5 dBm at 80 GHz. The conversion gain (CG) is 8.5-11.5 dB at 76-81 GHz, while noise figure is 7.2-8.7 dB. The chip size is only 0.23 mm2 excluding PADs.

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来源期刊

2018 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

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