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Erschienen in:
01.11.2014
A Wide Tuning Range Voltage Controlled Oscillator with a High Tunable Active Inductor
Erschienen in: Wireless Personal Communications | Ausgabe 1/2014
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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.