Fig. 1.
Proposed VCXO block diagram.
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| Citation: |
Yanjun Yang, Yun Zeng. A fully integrated CMOS VCXO-IC with low phase noise, wide tuning range and high tuning linearity[J]. Journal of Semiconductors, 2015, 36(6): 065009. doi: 10.1088/1674-4926/36/6/065009
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Y J Yang, Y Zeng. A fully integrated CMOS VCXO-IC with low phase noise, wide tuning range and high tuning linearity[J]. J. Semicond., 2015, 36(6): 065009. doi: 10.1088/1674-4926/36/6/065009.
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A fully integrated CMOS VCXO-IC with low phase noise, wide tuning range and high tuning linearity
DOI: 10.1088/1674-4926/36/6/065009
More Information
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Abstract
This paper describes a low phase noise, wide tuning range and high tuning linearity CMOS voltage controlled crystal oscillator IC (VCXO-IC) with LVCMOS or LVPECL output. A differential coupled frequency doubling Colpitts oscillator is adopted to obtain low noise 2 × frequency output. A wide tuning range and high linearity are simultaneously achieved by using MOS varactor arrays. The measurement results show that the designed VCXO-IC achieves-134 dBc/Hz phase noise at 1 kHz offset frequency and ± 135 ppm output frequency tuning range within 3% linearity by using 40 MHz fundamental AT-cut crystal. The VCXO-IC is fabricated in the chartered 0.35 μm standard CMOS process and occupies a total silicon area of 2.4 mm2.-
Keywords:
- VCXO,
- varactor,
- linear frequency tuning,
- low phase noise
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References
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] -
Proportional views
