J. Semicond. > 2010, Volume 31 > Issue 7 > 075011

SEMICONDUCTOR INTEGRATED CIRCUITS

A novel reconfigurable variable gain amplifier for a multi-mode multi-band receiver

Zheng Jiajie, Mo Taishan, Ma Chengyan and Yin Ming

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DOI: 10.1088/1674-4926/31/7/075011

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Abstract: This paper presents a novel approach for designing a reconfigurable variable gain amplifier (VGA) for the multi-mode multi-band receiver system RF front-end applications. The configuration, which is comprised of gain circuits, control circuit, DC offset cancellation circuit and mode switch circuit is proposed to save die area and power consumption with the function of multi-mode and multi-band through reusing. The VGA is realized in 0.18 μm CMOS technology with 1.8 V power supply voltage providing a gain tuning range from 5 to 87 dB when the control voltage varies from 0 to 1.8 V. The 3 dB bandwidth is about 80 MHz for all levels of control voltage (all gains). Also, the DC offset cancellation circuit can effectively suppress DC offset to a value of less than 40 mV at the output regardless of the input. The overall power consumption is less than 3 mA, and die area is 705 × 100 μm2.

Key words: variable gain amplifier

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    Received: 18 August 2015 Revised: 26 February 2010 Online: Published: 01 July 2010

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      Zheng Jiajie, Mo Taishan, Ma Chengyan, Yin Ming. A novel reconfigurable variable gain amplifier for a multi-mode multi-band receiver[J]. Journal of Semiconductors, 2010, 31(7): 075011. doi: 10.1088/1674-4926/31/7/075011 ****Zheng J J, Mo T S, Ma C Y, Yin M. A novel reconfigurable variable gain amplifier for a multi-mode multi-band receiver[J]. J. Semicond., 2010, 31(7): 075011. doi:  10.1088/1674-4926/31/7/075011.
      Citation:
      Zheng Jiajie, Mo Taishan, Ma Chengyan, Yin Ming. A novel reconfigurable variable gain amplifier for a multi-mode multi-band receiver[J]. Journal of Semiconductors, 2010, 31(7): 075011. doi: 10.1088/1674-4926/31/7/075011 ****
      Zheng J J, Mo T S, Ma C Y, Yin M. A novel reconfigurable variable gain amplifier for a multi-mode multi-band receiver[J]. J. Semicond., 2010, 31(7): 075011. doi:  10.1088/1674-4926/31/7/075011.

      A novel reconfigurable variable gain amplifier for a multi-mode multi-band receiver

      DOI: 10.1088/1674-4926/31/7/075011
      • Received Date: 2015-08-18
      • Accepted Date: 2010-01-25
      • Revised Date: 2010-02-26
      • Published Date: 2010-07-05

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