摘要
An integrated low power CMOS VCO and its divide by 2 dividers for WLAN transceivers are presented.The VCO is based on on chip symmetrical spiral inductor and differential diode and the divide by 2 dividers are based on the ILFD technique.Due to differential LC tanks and ILFD techniques,power consumption is low.The circuit is implemented in a 0 18μm CMOS process.Measurements show the proposed circuit could produce 3 6/1 8GHz dual band LO signals with a wide tuning range and low phase noise.1 8GHz LO signals are quadrature.It consumes 5mA at V DD =1 5V.The size of die area is only 1 0mm×1 0mm.
实现了应用于无线局域网收发机的集成低功耗 CMOS压控振荡器及其二分频器 .压控振荡器是由在片对称螺旋型电感和差分容抗管组成的 L C负阻型振荡器 ,而二分频器采用了 IL FD结构 .由于采用了差分 L C元件和 IL -FD技术 ,整个电路的功耗很低 .该电路已经用 0 .18μm CMOS工艺实现 .测试结果表明该电路能产生低相位噪声的 3.6 / 1.8GHz双带本振信号 ,并具有很宽的可控频率范围 .当电源电压为 1.5 V时 ,该电路消耗了 5 m A的电流 .芯片面积为 1.0 m m× 1.0 m m.
