| Citation: |
Li Wenyuan, Li Xian, Wang Zhigong. LC voltage controlled oscillator in 0.18-μm RF CMOS[J]. Journal of Semiconductors, 2011, 32(11): 115003. doi: 10.1088/1674-4926/32/11/115003
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Li W Y, Li X, Wang Z G. LC voltage controlled oscillator in 0.18-μm RF CMOS[J]. J. Semicond., 2011, 32(11): 115003. doi: 10.1088/1674-4926/32/11/115003.
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Abstract
An integrated low-phase-noise voltage-controlled oscillator (VCO) has been designed and fabricated in SMIC 0.18 μm RF CMOS technology. The circuit employs an optimally designed LC resonator and a differential cross-coupling amplifier acts as a negative resistor to compensate the energy loss of the resonator. To extend the frequency tuning range, a three-bit binary-weighted switched capacitor array is used in the circuit. The testing result indicates that the VCO achieves a tuning range of 60% from 1.92 to 3.35 GHz. The phase noise of the VCO is -117.8 dBc/Hz at 1 MHz offset from the carrier frequency of 2.4 GHz. It draws 5.6 mA current from a 1.8 V supply. The VCO integrated circuit occupies a die area of 600 × 900 μm2. It can be used in the IEEE802.11b based wireless local network receiver.-
Keywords:
- VCO
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References
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] -
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