An output amplitude configurable wideband automatic gain control (AGC) with high gain step accuracy for the GNSS receiver is presented.The amplitude of an AGC is configurable in order to cooperate with baseband chips to achieve interference suppression and be compatible with different full range ADCs.And what's more,the gain-boosting technology is introduced and the circuit is improved to increase the step accuracy.A zero,which is composed by the source feedback resistance and the source capacity,is introduced to compensate for the pole.The AGC is fabricated in a 0.18 μm CMOS process.The AGC shows a 62 dB gain control range by 1 dB each step with a gain error of less than 0.2 dB.The AGC provides 3 dB bandwidth larger than 80 MHz and the overall power consumption is less than 1.8 mA,and the die area is 800 × 300μm2.
参考文献
| [1] | Khoury J M.On the design of constant settling time AGC circuits.IEEE Trans Circuits Syst Ⅱ,1998,45:283 |
| [2] | Li X Q,Dong L M,Peng X H.A 20 dB,250 M CMOS variable gain amplifier for GPS receiver.Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics (PrimeAsia),2010:267 |
| [3] | Lee H D,Lee K A,Hong S.A wideband CMOS variable gain amplifier with an exponential gain control.IEEE Trans Microwave Theory Tech,2007,55:1363 |
| [4] | Rijns J J F.CMOS low-distortion high-frequency variable-gain amplifier.IEEE J Solid-State Circuits,1996,31:1029 |
| [5] | Jeon O,Fox R M,Myers B A.Analog AGC circuitry for a CMOS WLAN receiver.IEEE J Solid-State Circuits,2006,41:2291 |
| [6] | Watanabe O,Otaka S,Ashida M,et al.A 380-MHz CMOS linearin-dB signal-summing variable gain amplifier with gain compensation techniques for CDMA systems.Symposium on VLSI Circuits Digest of Technical Papers,2002:136 |
| [7] | Duong Q H,Le Q,Kim C W,et al.A 95-dB linear low-power variable gain amplifier.IEEE Trans Circuits Syst I,2006,53:1648 |
| [8] | Amoroso F.Adaptive A/D converter to suppress CW interference in DSPN spread-spectrum communications.IEEE Trans Commun,1983,31:1117 |
| [9] | Roovers R.Digital controlled variable gain amplifier (DVGA)for IF to digital conversion.Proceedings of the 24th European Solid-State Circuits Conference,1998:152 |
| [10] | Alegre J P,Celma S,Calvo B,et al.SiGe analog AGC circuit for an 802.11a WLAN direct conversion receiver.IEEE Trans Circuits Syst Ⅱ,2009,56:93 |
| [11] | Jia B,Chen G C,Zhang H.A low-power digitally-programmable accurate decibel-linear CMOS VGA for UWB systems.IEEE International Conference on Electron Devices and Solid-State Circuits,2008:1 |
| [12] | Ngnyen H H,Duong Q H,Le H B,et al.Low-power 42 dB-linear single-stage digitally-controlled variable gain amplifier.Electron Lett,2008,44:780 |
| [13] | Kitsunezuka M,Tokairin T,Maeda T,et al.A low-IF/zero-IF reconfigurable analog baseband IC with an I/Q imbalance cancellation scheme.IEEE J Solid-State Circuits,2011,46:572 |
| [14] | Roovers R.Digital controlled variable gain amplifier (DVGA)for IF to digital conversion.Proceedings of the 24th European Solid-State Circuits Conference,1998:152 |
| [15] | Zhang W,Hassoun M.A small signal analysis of a gain-boosting amplifier.Southwest Symposium on Mixed-Signal Design,2000:141 |
| [16] | Jeon O,Fox RM,Myers B A.Analog AGC circuitry for a CMOS WLAN receiver.IEEE J Solid-State Circuits,2006,41(10):2291 |
| [17] | Behzad R.Design of analog CMOS integrated circuits.Xian Jiaotong University Press,2006 |
| [18] | Kitsunezuka M,Hori S,Maeda T.A widely-tunable reconfigurable CMOS analog baseband IC for software-defined radio.Digest of Technical Papers,IEEE International Solid-State Circuits Conference,2008:66 |
| [19] | Hu H,Yah T T,Mao C,et al.A single ended input wideband variable gain low noise amplifier with balanced differential output and digital AGC for CMMB TV tuner.Proceedings of the 12th International Symposium on Integrated Circuits,2009:393 |
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