A 0.8-3 GHz RF-VGA with 35 dB dynamic range in 0.13 μm CMOS

作者：Qin Xi; Huang Xingli; Qin Yajie; Hong Zhiliang^*

来源：Chinese Journal of Semiconductors, 2012, 33(1).

DOI：10.1088/1674-4926/33/1/015009

• 1dB compression point
• Active baluns
• Bandwidth extension
• CMOS technology
• DC-offset cancellation
• Dual-loop feedback
• Dynamic range
• Gain tuning
• Measurement results
• Miller effects
• Minimum noise figure
• Noise performance
• Power supply
• RF-VGA
• Source degeneration
• Variable gain
• Variable gain amplifiers
• Wide-band

A wideband variable gain amplifier (VGA) implemented in 0.13 μm CMOS technology is presented. To optimize noise performance, an active feedback amplifier with 15 dB fixed gain is put in the front, followed by modified Cherry-Hooper amplifiers in cascade providing variable gain, which adopt dual loop feedback for bandwidth extension. Negative capacitive neutralization and capacitive source degeneration are employed for Miller effect compensation and DC offset cancellation, respectively. Measurement results show that the proposed VGA achieves a 35 dB gain tuning range with an upper 3-dB bandwidth larger than 3 GHz and the input 1 dB compression point of -29 dBm at the lowest gain state, while the minimum noise figure is 9 dB at the highest gain state. The core VGA (without test buffer) consumes 32 mW from 1.2 V power supply and occupies 0.48 mm2area.

• 出版日期2012
• 单位复旦大学