Design of Wideband Low Phase Noise Class-C QVCO with Low Amplitude and Phase Errors
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 7293700 |
Pages (from-to) | 724-726 |
Journal / Publication | IEEE Microwave and Wireless Components Letters |
Volume | 25 |
Issue number | 11 |
Publication status | Published - 1 Nov 2015 |
Link(s)
Abstract
This letter presents a wideband, low phase noise, quadrature voltage controlled oscillator (QVCO) implemented in 0.18 μm CMOS. In order to improve the phase noise while provide high efficient oscillation, the cooperation of a Class-C operation with a bulk-coupled structure are adopted into a PMOS-only VCO. With high fundamental current amplitude generated and the frequency offset of the QVCO alleviated, the phase noise is improved significantly. The measurement shows 2-8 dB phase noise improvement with a minimum value of-124 dBc/Hz at 1 MHz offset. Wide tuning range of 22.6% is realized by four-bit switched-capacitor-array ranging from 5.6 to 6.9 GHz. The quadrature accuracy of the proposed QVCO is evaluated by the measured results of an image-rejection mixer (IR-mixer), which exhibits a peak image rejection ratio (IRR) of 40 dBc, indicating low amplitude and phase errors simultaneously.
Research Area(s)
- CMOS Class-C QVCO, low amplitude and phase error, low phase noise, wideband
Citation Format(s)
Design of Wideband Low Phase Noise Class-C QVCO with Low Amplitude and Phase Errors. / Zhang, Haiwei; Xue, Quan.
In: IEEE Microwave and Wireless Components Letters, Vol. 25, No. 11, 7293700, 01.11.2015, p. 724-726.
In: IEEE Microwave and Wireless Components Letters, Vol. 25, No. 11, 7293700, 01.11.2015, p. 724-726.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review