Fully integrated 10 GHz CMOS VCO |
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| Authors: | Do M.A. Zhao R. Yeo K.S. Ma J.-G. |
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| Affiliation: | Div. of Circuits & Syst, Nanyang Technol. Univ.; |
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| Abstract: | A differential voltage-controlled oscillator has been designed to operate in the 10 GHz band using a 0.25 μm CMOS process and low Q integrated inductors. The low gain and low Q problems of the components are overcome by the deployment of the cascode configuration with negative conductance generation to enhance the loop gain and Q value. PMOS varactors are used for varying the oscillating frequency from 9.7 to 11.4 GHz. The phase noise at 400 kHz offset is from -101 dB/Hz at the low frequency end to -87 dB/Hz at the high frequency end |
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