A 65 nm CMOS base band filter for 77 GHz automotive radar compensating path loss difference
Microwave Conference Proceedings（2012）
摘要
In this paper, a baseband filter is proposed in order to maintain the constant sensitivity regardless of distance difference for 77 GHz automotive radar system. Using DCOC loop circuit, as well as removing DC offset noise, compensation of the received power difference depending on the distance is achieved. Measured results show that the maximum gain is 51 dB and high pass cutoff frequency can be tuned from 5 KHz to 15 KHz. The slope of high pass filter can be tuned from -10 to -40 dB/decade for the distance compensation. The measured IIP3 is + 4.5 dBm at 100 KHz with 4.3mA at 1.0V supply voltage. The fabricated die size 500 μm × 1050 μm excluding the in/out pads.
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关键词
CMOS integrated circuits,CW radar,FM radar,field effect MIMIC,high-pass filters,millimetre wave filters,road vehicle radar,CMOS base band filter,DCOC loop circuit,IIP3,automotive radar compensating path loss difference,automotive radar system,baseband filter,constant sensitivity,current 4.3 mA,frequency 5 kHz to 15 kHz,frequency 77 GHz,high pass cutoff frequency,high pass filter,received power difference,size 65 nm,voltage 1 V,Active filters,Automotive applications,Baseband,CMOS integrated circuits,Millimeter wave radar,
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