43GHz低功耗和低相噪VCO设计

Design of a 43 GHz VCO with Low Power Dissipation and Low Phase Noise

基于0.13μm CMOS工艺,设计了一个43GHz低功耗和低相噪压控振荡器（VCO）.通过去除尾电流管及改进偏置电路降低了VCO核的功耗和相噪,改进LC谐振回路设计抑制二次谐波噪声进一步改善了整个VCO的相噪.通过后仿真验证,在0～1.2V调谐电压作用下,所设计VCO的调谐范围为41.36～44.56GHz;在1.2V电源电压下整个VCO核的功耗仅为4.8 mW;在中心频率43GHz频偏1 MHz和10 MHz处的相位噪声分别为-97.5dBc/Hz和-119.5dBc/Hz;在外接50Ω负载的情况下,中心频率43GHz处输出功率为-5dBm.

A 43 GHz voltage-controlled oscillator （VCO） with low power consumption and low phase noise has been designed in 0. 13-μm CMOS technology. The dc power consumption of the VCO core is reduced and the phase noise is also improved by removing the tail current source and modifying bias circuit. A modified LC-tank is proposed to suppress the second harmonic noise to further improve the phase noise. The simulated tuning range of the proposed VCO is 41.36～44. 56 GHz when the tuning voltage changes from 0 to 1. 2 V. At a 1.2 V supply, the total dc power dissipation of the VCO core is only 4. 8 mW. At the center frequency of 43 GHz, the simulated phase noises at 1 and 10 MHz offset frequencies are respectively --97. 5 dBc/Hz and --119. 5 dBc/Hz and the simulated output power is --5 dBm with a 50 Ω load.