A self-correcting quadrature voltage controlled oscillator

作者：Arai Tomoyuki^*; Hajimiri Ali

来源：IEICE Electronics Express, 2014, 11(19): 20140684.

DOI：10.1587/elex.11.20140684

• CMOS
• voltage controlled oscillator (VCO)
• quadrature
• phase error
• phase noise

A self-correcting quadrature voltage controlled oscillator (QVCO) with phase correcting loop is proposed. It comprises the QVCO core and phase correcting loop, which corrects the quadrature phase error. Two LC VCOs, buffers, and phase shifters are coupled in circular configuration to achieve IQ symmetry. This paper introduces the idea of realizing QVCO with low phase noise and accurate quadrature phase by using the phase correcting loop. The simulation results based on the 65 nm CMOS process show that the self-correcting QVCO has a phase error less than 0.5 degrees and 1 MHz offset phase noise of -120 dBc/Hz at 3.7 GHz with 49% tuning range.

• 出版日期2014