J. Semicond. > 2008, Volume 29 > Issue 4 > 655-659

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A High Purity Integer-N Frequency Synthesizer in 0.35μm SiGe BiCMOS

Zhang Jian, Li Zhiqiang, Chen Liqiang, Chen Pufeng and Zhang Haiying

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Abstract: An integer-N frequency synthesizer in 0.35μm SiGe BiCMOS is presented.By implementing different building blocks with different types of devices,a high purity frequency synthesizer with excellent spur and phase noise performance has been realized.All the building blocks are implemented with differential topology except for the off-chip loop filter.To further reduce the phase noise,bonding wires are used to form the resonator in the LC-VCO.The frequency synthesizer operates from 239 to 2.72GHz with output power of about 0dBm.The measured closed-loop phase noise is -95dBc/Hz at 100kHz offset and -116dBc/Hz at 1MHz offset from the carrier.The power level of the reference spur is less than -72dBc.With a 3V power supply,the whole chip including the output buffers consumes 60mA.

Key words: SiGe BiCMOSphase-locked loophigh purityloop bandwidth

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    Received: 18 August 2015 Revised: 04 December 2007 Online: Published: 01 April 2008

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      Zhang Jian, Li Zhiqiang, Chen Liqiang, Chen Pufeng, Zhang Haiying. A High Purity Integer-N Frequency Synthesizer in 0.35μm SiGe BiCMOS[J]. Journal of Semiconductors, 2008, In Press. Zhang J, Li Z Q, Chen L Q, Chen P F, Zhang H Y. A High Purity Integer-N Frequency Synthesizer in 0.35μm SiGe BiCMOS[J]. J. Semicond., 2008, 29(4): 655.Export: BibTex EndNote
      Citation:
      Zhang Jian, Li Zhiqiang, Chen Liqiang, Chen Pufeng, Zhang Haiying. A High Purity Integer-N Frequency Synthesizer in 0.35μm SiGe BiCMOS[J]. Journal of Semiconductors, 2008, In Press.

      Zhang J, Li Z Q, Chen L Q, Chen P F, Zhang H Y. A High Purity Integer-N Frequency Synthesizer in 0.35μm SiGe BiCMOS[J]. J. Semicond., 2008, 29(4): 655.
      Export: BibTex EndNote

      A High Purity Integer-N Frequency Synthesizer in 0.35μm SiGe BiCMOS

      • Received Date: 2015-08-18
      • Accepted Date: 2007-10-23
      • Revised Date: 2007-12-04
      • Published Date: 2008-04-03

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