A tri-mode Compass/GPS/Galileo RF receiver with all-digital automatic gain control loop

作者：Chen, Dongpo; Yan, Taotao; Jin, Jing; Mao, Cui; Lu, Yuxiao; Pan, Wenjie; Zhou, Jianjun^*

来源：Analog Integrated Circuits and Signal Processing, 2012, 70(1): 69-77.

DOI：10.1007/s10470-011-9656-z

• CMOS
• RF receiver
• Global Positioning System (GPS)
• Galileo
• Compass
• Single-chip radio
• Automatic gain control
• Anti-jamming

A tri-mode RF receiver with all digital automatic gain control (AGC) loop and non-uniform 2-bit analog-to-digital converter (ADC) is designed for the bands of GPS-L1, Galileo-E1 and Compass B1 in 0.18 mu m CMOS process. The RF front-end, analog baseband and frequency synthesizer with voltage controlled oscillator (VCO) have been integrated, and there are only few off-chip components including bypass capacitances, matching network and TCXO. For anti-jamming consideration, an all digital AGC loop with relevant variable gain amplifier (VGA) and non-uniform ADC is implemented to suppress interference and avoid saturation of signal chain. While drawing 35 mA current, this receiver achieves a total noise figure of 4 dB and a maximum gain of 105 dB, with a die area of 2.4 x 2.4 mm(2).

• 出版日期2012-1
• 单位上海交通大学