A Wide Tuning Range Voltage Controlled Oscillator with a High Tunable Active Inductor |
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Authors: | Hojjat Babaei Kia Abu Khari A’ain |
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Affiliation: | 1. Johor, Malaysia
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Abstract: | This paper presents a wide tuning range CMOS voltage controlled oscillator (VCO) with a high-tunable active inductor circuit. In this VCO circuit, the coarse frequency is achieved by tuning the integrated active inductor circuit. The VCO circuit is designed in 0.18 (upmu hbox {m}) CMOS process and simulated with Cadence Spectra. The simulation results show the frequency tuning range from 120 MHz to 2 GHz resulting in a tuning range of 94 %. The phase noise variation is from (-) 80 to (-) 90 dBc/Hz at a 1 MHz frequency offset, and output power variation is from (-) 4.7 to (+) 11.5 dBm. The active inductor power consumption is 2.2 mW and the total power dissipation is 7 mW from a 1.8 V DC power supply. By comparing the proposed VCO circuit with the general VCO topology, the results show that this VCO architecture by using the novel, high-tunable and low power active inductor circuit, presents a better performance regarding low chip size, low power consumption, high tuning range and high output power. |
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