| Citation: |
Fu Haipeng, Cai Deyun, Ren Junyan, Li Wei, Li Ning. A low reference spur quadrature phase-locked loop for UWB systems[J]. Journal of Semiconductors, 2011, 32(11): 115012. doi: 10.1088/1674-4926/32/11/115012
****
Fu H P, Cai D Y, Ren J Y, Li W, Li N. A low reference spur quadrature phase-locked loop for UWB systems[J]. J. Semicond., 2011, 32(11): 115012. doi: 10.1088/1674-4926/32/11/115012.
|
A low reference spur quadrature phase-locked loop for UWB systems
DOI: 10.1088/1674-4926/32/11/115012
-
Abstract
This paper presents a low phase noise and low reference spur quadrature phase-locked loop (QPLL) circuit that is implemented as a part of a frequency synthesizer for China UWB standard systems. A glitch-suppressed charge pump (CP) is employed for reference spur reduction. By forcing the phase frequency detector and CP to operate in a linear region of its transfer function, the linearity of the QPLL is further improved. With the proposed series-quadrature voltage-controlled oscillator, the phase accuracy of the QPLL is guaranteed. The circuit is fabricated in the TSMC 0.13 μm CMOS process and operated at 1.2-V supply voltage. The QPLL measures a phase noise of -95 dBc/Hz at 100-kHz offset and a reference spur of -71 dBc. The fully-integrated QPLL dissipates a current of 13 mA.-
Keywords:
- QPLL,
- charge pump,
- UWB,
- glitch,
- S-QVCO
-
References
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] -
Proportional views
DownLoad: