J. Semicond. > 2011, Volume 32 > Issue 8 > 085008

SEMICONDUCTOR INTEGRATED CIRCUITS

A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering

Xu Jiangtao, Carlos E. Saavedra and Chen Guican

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DOI: 10.1088/1674-4926/32/8/085008

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Abstract: A CMOS wideband front-end IC is demonstrated in this paper. It consists of a low noise transconductance amplifier (LNTA) and a direct RF sampling mixer (DSM) with embedded programmable discrete-time filtering. The LNTA has the features of 0.5–6 GHz wideband, wideband input matching and low noise. The embedded filter following the DSM operates in discrete-time charge domain, filtering the aliasing signals and interferences while controlling the IF bandwidth according to the clock frequency. The measured NF of the front-end was below 7 dB throughout the whole band from 0.5 to 6 GHz. It shows a conversion gain of 12.6 dB and IP1dB of -7.5 dBm at 2.4 GHz. It occupies a chip area of 0.23 mm2 and consumes 14 mA DC current.

Key words: wideband front-end

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    Xu Jiangtao, Carlos E. Saavedra, Chen Guican. A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering[J]. Journal of Semiconductors, 2011, 32(8): 085008. doi: 10.1088/1674-4926/32/8/085008
    Xu J T, Carlos E. Saavedra, Chen G C. A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering[J]. J. Semicond., 2011, 32(8): 085008. doi: 10.1088/1674-4926/32/8/085008.
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    Received: 18 August 2015 Revised: 07 April 2011 Online: Published: 01 August 2011

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      Xu Jiangtao, Carlos E. Saavedra, Chen Guican. A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering[J]. Journal of Semiconductors, 2011, 32(8): 085008. doi: 10.1088/1674-4926/32/8/085008 ****Xu J T, Carlos E. Saavedra, Chen G C. A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering[J]. J. Semicond., 2011, 32(8): 085008. doi: 10.1088/1674-4926/32/8/085008.
      Citation:
      Xu Jiangtao, Carlos E. Saavedra, Chen Guican. A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering[J]. Journal of Semiconductors, 2011, 32(8): 085008. doi: 10.1088/1674-4926/32/8/085008 ****
      Xu J T, Carlos E. Saavedra, Chen G C. A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering[J]. J. Semicond., 2011, 32(8): 085008. doi: 10.1088/1674-4926/32/8/085008.

      A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering

      DOI: 10.1088/1674-4926/32/8/085008
      • Received Date: 2015-08-18
      • Accepted Date: 2011-01-25
      • Revised Date: 2011-04-07
      • Published Date: 2011-07-19

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