基于电流复用技术的低功耗正交信号VCO  

A low-power quadrature signal generation VCO based on current reusing technology

作　　者：张顶顶[1,2,3] 张钊锋[1,3] 廖友春[1,2] 

机构地区：[1]中国科学院上海高等研究院,上海201210 [2]中国科学院大学,北京100049 [3]上海科技大学,上海201210

出　　处：《电子技术应用》2017年第7期32-35,39,共5页Application of Electronic Technique

摘　　要：针对低功耗蓝牙(Bluetooth Low Energy,BLE)正交上/下变频收发机,实现了一种低功耗的正交信号产生器。相比传统电流复用技术VCO,增加尾电流源以降低平均电流损耗,同时确保相位噪声满足指标要求。基于TSMC0.18μm标准CMOS工艺的仿真结果表明,正交信号频率为849.7 MHz时,在偏移中心频率1 MHz时的相位噪声为-126 d Bc/Hz;在1.8 V电源电压下仅消耗1.05 m A电流,Fo M值为182 d Bc。经过二分频后的正交信号总体频率范围是783~866 MHz,整体版图面积为0.38 mm^2。相位噪声和频率范围满足BLE指标要求,对其他低功耗射频应用具有指导意义。A low-power quadrature signal generator Voltage Controlled Oscillator （VCO） is implemented for quadrature upconversion and downconversion transceiver for Bluetooth Low Energy（BLE） application. Compared to conventional VCO based on current reusing technology, the stacked VCO and divide-by-two frequency divider has tail current source to help decrease current consumption. Besides, the phase noise requirements of BLE is satisfied. The simulation results based on TSMC 0.18 μm process show that the phase noise is -126 dBc/Hz at 1 MHz offset for 849.7 MHz quadrature signal. The VCO and divider consume only 1.05 mA from a 1.8 V supply, achieving FoM of 181 dBc. The overall frequency range of the quadrature signal is about 783 -866 MHz, and the area of the chip is 0.38 mm^2. This design meet the requirements of frequency range and phase noise of BLE, and has guiding significance for other low power RF applications.

关 键 词：电流复用 低功耗 正交信号 

分 类 号：TN4[电子电信—微电子学与固体电子学]