| Citation: |
Zhou Chunyuan, Zhang Lei, Qian He. A uniform phase noise QVCO with a feedback current source[J]. Journal of Semiconductors, 2012, 33(7): 075001. doi: 10.1088/1674-4926/33/7/075001
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Zhou C Y, Zhang L, Qian H. A uniform phase noise QVCO with a feedback current source[J]. J. Semicond., 2012, 33(7): 075001. doi: 10.1088/1674-4926/33/7/075001.
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Abstract
A novel integrated quadrature voltage controlled oscillator (QVCO) with a feedback current source is presented in this paper. Benefiting from the current adjusting function of the feedback current source, the proposed QVCO exhibits a uniform phase noise over the entire tuning range. This QVCO is implemented in 65-nm CMOS technology. The measurement results show that it draws less than 3-mA average current from a 1.2-V supply and the phase noise is less than -110 dBc/Hz @1MHz offset over the entire tuning range. The fluctuation of phase noise @1MHz offset from the center frequency of 2.84-GHz to 3.27-GHz is less than 1 dBc/Hz, which validates the correctness of the proposed current source feedback technique.-
Keywords:
- QVCO
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References
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] -
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