J. Semicond. > 2009, Volume 30 > Issue 2 > 025003

SEMICONDUCTOR INTEGRATED CIRCUITS

A linear stepping PGA used in CMOS image sensors

Xu Jiangtao, Li Binqiao, Zhao Shibin, Li Hongle and Yao Suying

+ Author Affiliations
DOI: 10.1088/1674-4926/30/2/025003

PDF

Abstract: A low power linear stepping digital programming gain amplifier (PGA) is designed for CMOS image sensors. The PGA consists of three stages with gain range from one to nine. The gain is divided into four regions and each range has 128 linear steps. Power consumption of the PGA is saved by good tradeoff between variation of amplifier feedback coefficient, pipeline stages and gain regions. With thermometer-binary mixed coding and linear pipeline gain stepping, the load capacitance keeps constant when the gain of one stage is changed. The PGA is designed in the SMIC 0.18 µm process. Simulation results show that the power consumption is 3.2 mW with 10 bit resolution and 10 MSPS sampling rate. The PGA has been embedded in a 0.3 megapixel CMOS image sensors and fabricated successfully.

Key words: CMOS image sensor programmable gain amplifier linear stepping low power consumption

  • Search

    Advanced Search >>

    GET CITATION

    shu

    Export: BibTex EndNote

    Article Metrics

    Article views: 4594 Times PDF downloads: 2665 Times Cited by: 0 Times

    History

    Received: 18 August 2015 Revised: 21 October 2008 Online: Published: 01 February 2009

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Xu Jiangtao, Li Binqiao, Zhao Shibin, Li Hongle, Yao Suying. A linear stepping PGA used in CMOS image sensors[J]. Journal of Semiconductors, 2009, 30(2): 025003. doi: 10.1088/1674-4926/30/2/025003 ****Xu J T, Li B Q, Zhao S B, Li H L, Yao S Y. A linear stepping PGA used in CMOS image sensors[J]. J. Semicond., 2009, 30(2): 025003. doi:  10.1088/1674-4926/30/2/025003.
      Citation:
      Xu Jiangtao, Li Binqiao, Zhao Shibin, Li Hongle, Yao Suying. A linear stepping PGA used in CMOS image sensors[J]. Journal of Semiconductors, 2009, 30(2): 025003. doi: 10.1088/1674-4926/30/2/025003 ****
      Xu J T, Li B Q, Zhao S B, Li H L, Yao S Y. A linear stepping PGA used in CMOS image sensors[J]. J. Semicond., 2009, 30(2): 025003. doi:  10.1088/1674-4926/30/2/025003.

      A linear stepping PGA used in CMOS image sensors

      DOI: 10.1088/1674-4926/30/2/025003
      • Received Date: 2015-08-18
      • Accepted Date: 2008-06-23
      • Revised Date: 2008-10-21
      • Published Date: 2009-02-16

      Catalog

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return