| 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
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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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A CMOS wideband front-end chip using direct RF sampling mixer with embedded discrete-time filtering
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.-
Keywords:
- wideband front-end
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References
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] -
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