SEMICONDUCTOR INTEGRATED CIRCUITS

An output amplitude configurable wideband automatic gain control with high gain step accuracy

He Xiaofeng, Mo Taishan, Ma Chengyan and Ye Tianchun

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Abstract: 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 × 300 μm2.

Key words: automatic gain control

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    Received: 20 August 2015 Revised: 23 September 2011 Online: Published: 01 February 2012

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      He Xiaofeng, Mo Taishan, Ma Chengyan, Ye Tianchun. An output amplitude configurable wideband automatic gain control with high gain step accuracy[J]. Journal of Semiconductors, 2012, 33(2): 025009. doi: 10.1088/1674-4926/33/2/025009 He X F, Mo T S, Ma C Y, Ye T C. An output amplitude configurable wideband automatic gain control with high gain step accuracy[J]. J. Semicond., 2012, 33(2): 025009. doi: 10.1088/1674-4926/33/2/025009.Export: BibTex EndNote
      Citation:
      He Xiaofeng, Mo Taishan, Ma Chengyan, Ye Tianchun. An output amplitude configurable wideband automatic gain control with high gain step accuracy[J]. Journal of Semiconductors, 2012, 33(2): 025009. doi: 10.1088/1674-4926/33/2/025009

      He X F, Mo T S, Ma C Y, Ye T C. An output amplitude configurable wideband automatic gain control with high gain step accuracy[J]. J. Semicond., 2012, 33(2): 025009. doi: 10.1088/1674-4926/33/2/025009.
      Export: BibTex EndNote

      An output amplitude configurable wideband automatic gain control with high gain step accuracy

      doi: 10.1088/1674-4926/33/2/025009
      • Received Date: 2015-08-20
      • Accepted Date: 2011-08-15
      • Revised Date: 2011-09-23
      • Published Date: 2012-01-20

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