کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
547820 | 872060 | 2009 | 6 صفحه PDF | دانلود رایگان |
A wide band, differentially switch-tuned CMOS monolithic LC–VCO is presented in this paper, as well as a frequency divider for high linearity, low Kvco quadrature signal generation. A linearity control logic is proposed. The Kvco linearity is improved to be lower than 17.68 MHz/V. By using the proposed CML DFF, the operating frequency of the frequency divider is increased by 20% with a power consumption of 3.6 mW. The proposed design has been fabricated and verified in a 0.18 μm CMOS process. The QVCO is tuned in a combined way of continuous technology and 4 bit binary switch capacitor array (SCA) discrete tuning technology. The measurement indicates that the QVCO has a 19.7% tuning range from 1.816 to 2.213 GHz. The measured phase noise is −112.25 dBc/Hz at 1 MHz offset from the 1.819 GHz carrier and draws a current of 4.0 mA around at a 1.8 V supply.
Journal: Microelectronics Journal - Volume 40, Issue 6, June 2009, Pages 881–886