SEMICONDUCTOR INTEGRATED CIRCUITS

A 1.5 V 7.656 GHz PLL with I/Q outputs for a UWB synthesizer

Chen Pufeng, Zhang Haiying and Ye Tianchun

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Abstract: A fully integrated CMOS phase-locked loop (PLL) which can synthesize a quadrature output frequency of 7.656 GHz is presented. The proposed PLL can be employed as a building block for an MB-OFDM UWB frequency synthesizer. To achieve fast loop settling, integer-N architecture operating with 66 MHz reference frequency and wideband QVCO are implemented. I/Q carriers are generated by two bottom-series cross-coupled LC VCOs. Realized in 0.18 μm CMOS technology, this PLL consumes 16 mA current (including buffers) from a 1.5 V supply and the phase noise is –109.6 dBc/Hz at 1 MHz offset. The measured oscillation frequency shows that the QVCO has a range of 6.95 to 8.73 GHz. The core circuit occupies an area of 1×0.5 mm2.

Key words: 7.656-GHz frequency synthesizer PLL MB-OFDM CMOS

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    Received: 18 August 2015 Revised: 20 February 2010 Online: Published: 01 June 2010

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      Chen Pufeng, Zhang Haiying, Ye Tianchun. A 1.5 V 7.656 GHz PLL with I/Q outputs for a UWB synthesizer[J]. Journal of Semiconductors, 2010, 31(6): 065001. doi: 10.1088/1674-4926/31/6/065001 Chen P F, Zhang H Y, Ye T C. A 1.5 V 7.656 GHz PLL with I/Q outputs for a UWB synthesizer[J]. J. Semicond., 2010, 31(6): 065001. doi: 10.1088/1674-4926/31/6/065001.Export: BibTex EndNote
      Citation:
      Chen Pufeng, Zhang Haiying, Ye Tianchun. A 1.5 V 7.656 GHz PLL with I/Q outputs for a UWB synthesizer[J]. Journal of Semiconductors, 2010, 31(6): 065001. doi: 10.1088/1674-4926/31/6/065001

      Chen P F, Zhang H Y, Ye T C. A 1.5 V 7.656 GHz PLL with I/Q outputs for a UWB synthesizer[J]. J. Semicond., 2010, 31(6): 065001. doi: 10.1088/1674-4926/31/6/065001.
      Export: BibTex EndNote

      A 1.5 V 7.656 GHz PLL with I/Q outputs for a UWB synthesizer

      doi: 10.1088/1674-4926/31/6/065001
      • Received Date: 2015-08-18
      • Accepted Date: 2009-11-16
      • Revised Date: 2010-02-20
      • Published Date: 2010-06-03

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