CAJ | 학술논문

为了满足无线通信系统应用需要,设计了一种主从耦合式LC压控振荡器(VCO).基于0.18 μm CMOS标准工艺,由一个5 GHz主VCO和两个起分频作用的从VCO组成,其中主VCO选用PMOS考毕兹差分振荡结构,在两个互补交叉耦合的从VCO的输出端之间设置有注入式NMOS器件以达到分频的目的.仿真及硬件电路实验结果表明,在1.8 V低电源电压下,5 GHz主VCO的调谐范围为4.68～5.76 GHz,2.5 GHz从VCO的调谐范围为2.32～2.84 GHz;在1 MHz的偏频下,5 GHz主VCO的相位噪声为118.2 dBc/Hz,2.5 GHz从VCO的相位噪声为124.4 dBc/Hz.另外,主从VCO的功耗分别为6.8 mW和7.9 mW,因此特别适用于低功耗、超高频短距离无线通信系统中.
위료만족무선통신계통응용수요,설계료일충주종우합식LC압공진탕기(VCO).기우0.18 μm CMOS표준공예,유일개5 GHz주VCO화량개기분빈작용적종VCO조성,기중주VCO선용PMOS고필자차분진탕결구,재량개호보교차우합적종VCO적수출단지간설치유주입식NMOS기건이체도분빈적목적.방진급경건전로실험결과표명,재1.8 V저전원전압하,5 GHz주VCO적조해범위위4.68～5.76 GHz,2.5 GHz종VCO적조해범위위2.32～2.84 GHz;재1 MHz적편빈하,5 GHz주VCO적상위조성위118.2 dBc/Hz,2.5 GHz종VCO적상위조성위124.4 dBc/Hz.령외,주종VCO적공모분별위6.8 mW화7.9 mW,인차특별괄용우저공모、초고빈단거리무선통신계통중.
To meet the needs of wireless communication system, a master-slave coupled VCO was designed. The VCO based on 0.18 μm CMOS standardized technology is composed of a master 5 GHz VCO and two slave VCOs as the frequency divider. A full PMOS Colpitts differential oscillator structure was adopted on the master VCO. To achieve the function of dividing frequency, an injection NMOS was added between the two coupled slave VCOs. The simulation and hardware experimental results show that when the supply voltage is as low as 1.8 V, the turning ranges of the 5 GHz master VCO and 2.5 GHz slave VCO are from 4.68 to 5.76 GHz and from 2.32 to 2.84 GHz, respectively. When the offset frequency is 1 MHz, the measured phase noise of the master VCO is 118.2 dBc/Hz, while the measured phase noise of the slave VCO worked as divider is 124.4 dBc/Hz. The power consumption is 6.8 mW and 7.9 mW at master and slave VCO, respectively. So it is very suitable for low power and UHF communication systems.