A New Technique for the Design of Multi-Phase Voltage Controlled Oscillators

作者：Sun, Jingru^*; Huang, Pan; Sun, Yichuang

来源：Journal of Circuits, Systems, and Computers, 2017, 26(7): 1750113.

DOI：10.1142/S0218126617501134

• Bulk-coupling
• second-harmonic
• low phase noise
• low power consumption
• multiphase voltage controlled oscillator (MVCO)

In this work, a novel circuit structure for second-harmonic multi-phase voltage controlled oscillator (MVCO) is presented. The proposed MVCO is composed of N (N being an integer number and N >= 2) identical inductor-capacitor (LC) tank VCOs. In theory, this MVCO can provide 2N diffrerent phase sinusoidal signals. A six-phase VCO based on the proposed structure is designed in a TSMC 0.18um CMOS process. Simulation results show that at the supply voltage of 0.8 V, the total power consumption of the six-phase VCO circuit is about 1 mW, the oscillation frequency is tunable from 2.3 GHz to 2.5 GHz when the control voltage varies from 0V to 0.8 V, and the phase noise is lower than -128 dBc/Hz at 1 MHz offset frequency. The proposed MVCO has lower phase noise, lower power consumption and more outputs than other related works in the literature.

• 出版日期2017-7
• 单位湖南大学